d b 40D Reference Sound Choice Pro Audio User Manual

d b 40D Reference Sound Choice Pro Audio

Specifications

• Model: xD40D
• Version: 1.3
• Power Cord: Z2612.024 NEMA 5-20P (US)
• Compliance: EN 55032:2019 Class B
• Impedance: 4 ohms minimum per channel

Product Usage Instructions

1. Intended Use

The d&b 40D amplifier is designed for installation purposes and is intended to be used with applicable d&b loudspeakers. It can be used in LINEAR mode as a power amplifier for linear installations.

Note: d&b audiotechnik will not be liable for any damages to third-party loudspeakers when used with d&b amplifiers in LINEAR mode.

2. Safety Instructions

Before using the product, carefully read and follow these safety instructions:

1. Keep these instructions for future reference.
2. Read and heed all warnings.
3. Follow all instructions provided.
4. Do not connect output pins to other amplifier inputs/outputs or to the ground to avoid damage or electric shock.
5. Lay cables carefully to prevent crushing or tripping hazards.
6. Use the mains plug as the disconnecting device and keep it accessible.
7. An experienced user should supervise equipment usage, especially by inexperienced individuals.

3. Loudspeaker Types

The maximum number of cabinets driven by each channel varies based on their nominal impedance. Refer to the respective loudspeaker manual or the d&b website for detailed information on supported loudspeakers and configurations.

The minimum recommended impedance per channel is 4 ohms.

Frequently Asked Questions

• Q: What should I do if I encounter acoustic interference or malfunctions with the amplifier?
  • A: If you experience acoustic interference or malfunctions, ensure that the unit is not operated in the immediate vicinity of high-frequency transmitters such as wireless microphones or mobile phones. While damage to the device is unlikely, it is best to operate it away from such sources to avoid potential issues.

“`

xD40D Reference manual 1.3 en

Notes on document version All previous versions of this document are hereby no longer valid. Version 1.3: 1. US power cord Z2612.024 NEMA 5-20P within delivery as
standard added. Refer to: Þ Chapter 2 “Scope of supply” on page 6 2. Chapter “Hardware reference” Þ Section “Power supply” revised. Refer to: Þ Chapter 8.1 “Power supply” on page 31.
General information 40D Reference manual Version: 1.3 en, 02/2024, D2039.EN .01 Copyright © 2024 by d&b audiotechnik GmbH & Co. KG; all rights reserved. Keep this document with the product or in a safe place so that it is available for future reference. We recommend you to regularly check the d&b website for the latest version of this document. When reselling this product, hand over this document to the new owner. If you supply d&b products, please draw the attention of your customers to this document. Enclose the relevant documents with the systems. If you require additional documents for this purpose, you can order them from d&b. d&b audiotechnik GmbH & Co. KG Eugen-Adolff-Str. 134, D-71522 Backnang, Germany T +49-7191-9669-0, F +49-7191-95 00 00 docadmin@dbaudio.com, www.dbaudio.com

IMPORTANT SAFETY INSTRUCTIONS

IMPORTANT SAFETY INSTRUCTIONS

Explanation of graphical symbols
The lightning symbol within a triangle is intended to alert the user to the presence of uninsulated “dangerous voltages” within the unit’s chassis that may be of sufficient magnitude to constitute a risk of electric shock to humans.
Before using this product, carefully read the applicable items of the following safety instructions.
1. Keep these instructions for future reference. 2. Read these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. WARNING! To reduce the risk of fire or electric shock:
­ Do not expose this unit to rain or moisture. ­ Keep water or other liquids away from the unit. ­ Do not place liquid filled containers, for example
beverages, on top of the unit. ­ Do not operate the unit while it is wet or standing in liquid. 6. Always operate the unit with the chassis ground wire connected to the electrical safety earth. Do not defeat the safety purpose of a grounding-type plug. A grounding-type plug has two blades and a third grounding prong. The third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 7. Do not use this unit if the power cord is damaged or frayed. Protect the power cord from being walked upon or pinched, particularly at the plugs and the point where it exits from the apparatus. 8. The unit is intended for use in a 19″ rack. Follow the mounting instructions. When a rack on wheels is used, exercise caution when moving the loaded rack to avoid injury from tipping over. 9. Unplug this apparatus during lightning storms or when unused for long periods of time.

The exclamation point within a triangle is intended to alert the user to the presence of important operating and service instructions in the literature accompanying the product.
10. Never connect an output pin to any other amplifier input or output pin or to the earth (ground). This may damage the unit or lead to electric shock.
11. Lay all cables connected to the unit carefully so that they cannot be crushed by vehicles or other equipment and that no one can either step on them or trip over them.
12. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way such as: ­ Power-supply cord or plug is damaged. ­ Liquid has been spilled into the unit. ­ An object has fallen into the unit. ­ The unit has been exposed to rain or moisture. ­ The unit does not operate normally. ­ The unit was dropped or the chassis is damaged. ­ Do not remove top or bottom covers. Removal of the covers will expose hazardous voltages. There are no user serviceable parts inside and removal may void the warranty.
13. Use the mains plug as the disconnecting device and keep it readily accessible. If the mains plug is not readily accessible due to mounting in a 19″ equipment cabinet, then the mains plug for the entire rack must be readily accessible.
14. An experienced user must always supervise the equipment, especially if inexperienced adults or minors are using the equipment.

d&b 40D Reference manual 1.3 en

d&b 40D Reference manual 1.3 en

Intended use

Intended use
The d&b 40D amplifier is designed for installation purposes and is intended to be used with applicable d&b loudspeakers.
A “LINEAR” setup is available allowing the amplifier to be used as a linear installation power amplifier.
Note: d&b audiotechnik will accept no liability for any damages to third-party loudspeakers when operated with d&b amplifiers in “LINEAR” mode.
NOTICE!
The device complies with the electromagnetic compatibility requirements of EN 55032:2019 (product family standard for audio, video, audio-visual and entertainment lighting control apparatus for professional use) for the environment Class B (residential).
Acoustic interference and malfunctions may occur if the unit is operated in the immediate vicinity of high-frequency transmitters (e.g. wireless microphones, mobile phones, etc.). Damage to the device is unlikely, but cannot be excluded.

1.1 Loudspeaker types The maximum number of cabinets driven by each channel varies depending on their nominal impedance. It can be found in the respective loudspeaker manual and also in the data section of each loudspeaker product page on the d&b website at www.dbaudio.com.
The minimum recommended impedance per channel is 4 ohms.

Nom. impedance 4 8 12 16 20

Cabinets per channel 1 2 3 4 5

A list of d&b loudspeakers supported by the amplifier is included in the Release notes of the amplifier firmware. The latest version can be found on the d&b website at www.dbaudio.com.

d&b 40D Reference manual 1.3 en

5

Scope of supply

Scope of supply
Before starting up the device, please verify the shipment for completeness and proper condition of the items. If there is any sign of obvious damage to the unit and/or the power cord, do not operate the unit and contact your local dealer from whom you received it.

Pos. Qty.

[1]

1

Including:

[1.1*] 1 [2]

9

d&b Code Z2830
Z2612.xxx

[3]

2

[4]

1

[5]

1

[6]

1

D2036.EN .01

Description

d&b 40D Amplifier
Power cord (specific to country*)
3-pin Phoenix Euroblock female: Intended for the INPUT/LINK/FAULT connector sockets. Connector type: MSTB 2.5 / 3-STZ – Phoenix order code: 1776168
4-pin Phoenix Euroblock male: Intended for the SPEAKER OUTPUTS connector sockets. Connector type: IPC 5/4-STF-7.62 – Phoenix order code: 1709173
9-pin Phoenix Euroblock female: Intended for the GPI connector socket. Connector type: MSTB 2.59-STZ-5.08 – Phoenix order code: 1764316
5-pin Phoenix Euroblock female: Intended for the GPO connector socket. Connector type: MSTB 2.55-STZ-5.08 – Phoenix order code: 1776142
d&b 40D Start-up manual.

Z2612.000 3-pin Schuko CEE 7/7

Z2612.010 3-pin UK BS 1363A

Z2612.024 3-pin U.S. NEMA 5-20P within delivery

Z2612.025 3-pin U.S. NEMA L6-20P optional

Z2612.035 3-pin Japan NEMA L6-20P

Z2612.040 3-pin South Korea KS C8305

Z2612.050 3-pin Australia AS 3112

Z2612.060 3-pin China GB 2099

Z2612.070 3-pin Switzerland SEV 1011

Z2612.090 3-pin Denmark Afsnit 107-2-D1

*Mains plug types and associated standards (Similar illustrations, not in scale)

Z2612.100 3-pin South Africa SANS 164-1

Z2612.110 3-pin Argentina IRAM 2073

Z2612.120 3-pin Brazil NBR 14136

Z2612.130 3-pin India IS 1293

6

d&b 40D Reference manual 1.3 en

Technical specifications

Technical specifications

Operating conditions Operating temperature (*continuous/**short-term)

­10 °C … +40*/+50* °C (+14 °F … +104/+122** °F)

Storage temperature

­20 °C … +70 °C (­4 °F … +158 °F)

Humidity (rel.), non-condensating

< 70 %

Power supply Switched mode power supply with automatic mains range selection and active Power Factor Correction (PFC).

Mains connector

powerCON® TRUE 1 TOP

Rated mains voltage (High range)

208 – 240 V, 50 – 60 Hz

Rated mains current (High range)

13 A

Rated mains voltage (Low range)

100 – 127 V, 50 – 60 Hz

Rated mains current (Low range)

20 A

Protection circuits Mains and power supply: Overvoltage and undervoltage, inrush current limiter, internal fuse.
Output: Overcurrent, DC offset, HF voltage limiter, pop-noise suppression.
Cooling: Temperature-dependent fan, self-resetting overtemperature protection.

Power consumption (typical values) Standby Idling Peak output

13 W 130 W 2900 W

Audio power outputs* SPEAKER OUTPUTS A/B/C/D

2 x 4-pin Phoenix Euroblock female

Maximum output voltage/current

180 Vpeak/35 Apeak

Output power rating EIA-426B noise CF 12 dB

4 x 2000 W/8

4 x 2400 W/4

Sine wave 1 kHz, long term, +40 °C (+104 °F)

4 x 250 W/4

Frequency response (­1 dB, Linear mode)

35 Hz ­ 25 kHz

Gain (Linear mode @ 0 dB)

31 dB

Output noise/Dynamic range

Output noise (BW 20 kHz)/dynamic range (BW 20 kHz, reference

180 Vpk)

Analog input

350 µVRMS/111 dB

Analog input, A-weighting

250 µVRMS/114 dB

Digital input

200 µVRMS/116 dB

Digital input, A-weighting

150 µVRMS/119 dB

THD+N / Crosstalk THD+N (unweighted, 20 ­ 20 kHz) 4 x 250 W/8 ohms 4 x 250 W/4 ohms Crosstalk (20 ­ 20 kHz)

< ­86 dB/0.005 % < ­83 dB/0.007 %
< ­70 dBr 4 x 250 W into 8/4

Analog inputs and outputs INPUT A1 – A4

3-pin Phoenix Euroblock male

Pin assignment

( ) GND, neg., pos.

Input impedance

32 k, electronically balanced

CMRR @ 100 Hz/1 kHz / 10 kHz

80/>80/>70 dB

Maximum input level (balanced/unbalanced)

+25/+18 dBu

+27.3 dBu @ 0 dBFS

Digital inputs and outputs

INPUT – D1/2, D3/4)

3-pin Phoenix Euroblock male, AES3

Pin assignment

( ) GND, AES Signal, AES Signal

Input impedance

110 , transformer balanced

Sampling frequency

44.1 | 48 | 96 | 192 kHz

Word length

16 – 24 bit

LINK – D1/2, D3/4

3-pin Phoenix Euroblock male

Pin assignment

( ) GND, AES Signal, AES Signal

electronically balanced

Output modes

Mains on: analog signal buffering (refresh)

Mains off/power fail: bypass relay

ETHERNET 1 (PRI)/ETHERNET 2 (SEC)

Connector type

2 x RJ 45

ETHERNET 1 (PRI)

Remote control via R1, Star topology

ETHERNET 2 (SEC)

Currently disabled

IP settings (factory default)

IP address/Subnet mask

192.168.1.40/255.255.255.0

GPI/GPO/FAULT External power supply

24 VDC ±25% (18 ­ 30 VDC)/150 W

GPI

8 x Opto-coupled (galvanic isolation)

High-level

18 … 30 VDC

Low-level

0 … 9 VDC

Serial resistance

5.4 kOhms

Forward voltage drop (Uf (max.))

3.7 V

Input current draw per pin @ 9/18/24/30 VDC

1.5/2.6/3.7/4.8 mA

Connector type

1 x 9-pin Phoenix Euroblock male

Pin assignment

( ) GND, GPIs 1 ­ 8

GPO High-state Low-state Max. current draw Connector type Pin assignment

4 x Low-Side-Switch-Relay Closed (connected to common GPO GND)
Open (high resistive) 1 A/Total: 4 A
1 x 5-pin Phoenix Euroblock male ( ) GND, GPOs 1 ­ 4

FAULT

NO – Normally Open | NC – Normally Closed 1 x 3-pin Phoenix Euroblock male

d&b 40D Reference manual 1.3 en

7

Technical specifications

Digital Signal Processing System start-up time

< 21 sec.

Time to tone (Standby/ReadyStandby)

< 4/< 1 sec.

Time to tone (Off/Wake on Audio)

< 21 /< 4 sec.

Conversion

96 kHz

Latency analog/digital (AES) input

0.3/0.3 msec.

A/D conversion

27 Bit (dual-stacked A/D converters)

Internal processing

Combination of high-resolution fixed point

and floating point processing

Equalizer

two user definable 16-band equalizers

Filter types: PEQ/Notch/HiShlv/LoShlv/Asym

Delay

0.3 msec. – 10 sec.

Frequency generator

Pink noise or Sine wave 10 Hz ­ 20 kHz

Controls and indicators RESET
TFT color touchscreen

Recessed push-button (rear panel) 4.3″/480 x 272 pixels

Fan noise emission Rack mounted, measured on axis, 1 m (3.3 ft) to front panel, A-weighting.

Min./Max. RPM

30/50 dB(A)

Ambient temperature 23 °C/73.4 °F

Dimensions and weight Height x width x depth
Weight

2 RU x 19″ x 465 mm (18.3″) 13.3 kg/29.3 lb

40D enclosure dimensions in mm [inch] 8

d&b 40D Reference manual 1.3 en

Technical specifications

*Audio power output ­ Measurement references:
All data is valid for 23 °C (73.4 °F) ambient temperature and 230 VAC/50 Hz mains supply. The power rating of noise signals is defined as the maximum of the instantaneous output power divided by a factor of two.

The power of burst signals refers to the power during the “on” period.
The duration of the peak output of a sine wave signal is defined at a drop of 0.5 dB/10% relative to the maximum output power.

EIA-426B noise Crest factor 12 dB
9 dB
6 dB
1 kHz burst On/off time 20 ms/0 dB 480 ms/­20 dB 200 ms/0 dB 600 ms/­20 dB 1 kHz sine wave Channels used 1
4

Load 4 ohms 8 ohms 4 ohms 8 ohms 4 ohms 8 ohms
Load 4 ohms 8 ohms 4 ohms 8 ohms
Load 4 ohms 8 ohms 4 ohms 8 ohms

Power rating 4 x 2400 W 4 x 2000 W 4 x 1300 W 4 x 2000 W 4 x 700 W 4 x 1150 W
Power 4 x 1200 W 4 x 1150 W 4 x 700 W 4 x 750 W
Max. output power 1 x 2400 W 1 x 2000 W 4 x 2400 W 4 x 2000 W

Power average 4 x 300 W 4 x 250 W 4 x 325 W 4 x 500 W 4 x 375 W 4 x 575 W
Duration of max. output 110 ms 2000 ms 5 ms 4 ms

d&b 40D Reference manual 1.3 en

9

Technical specifications

Measurement references
For all noise signals, the values are measured at the maximum level just before any amplifier limiter activity (no Gain Reduction).
Noise CF 12 dB: Noise signal according to EIA-426-B with a crest factor of 12 dB. This represents the use case of live music or less compressed recorded music.
Noise CF 9 dB: Noise signal according to EIA-426-B with a crest factor of 9 dB. This represents the use case of music with medium compression.

3.1 Current/power draw and thermal dissipation
Noise CF 6 dB: Noise signal according to EIA-426-B with a crest factor of 6 dB. This represents the use case of heavily compressed music.
Sine wave (100 ms): 1 kHz sine wave signal, 0 dBFS input level and a duration of 1 s. The RMS current value is calculated over a 100 ms time window. This window is stepped in increments of 10 ms over the recording. The resulting value is the highest current within a window of 100 ms.

230 VAC / 50 Hz / 0.5 Source impedance – all channels driven

State

Load Mains [ohms] current
[A RMS]

Power factor

Input power
[W]

Standby

–

0.26

0.22

13.5

Standby/Wake on Audio

–

0.29

0.31

20.8

ReadyStandby

–

0.43

0.54

52.6

Eco

–

0.83

0.54

103

Idling

–

0.75

0.74

127

Noise CF 12 dB

8

6.1

4

7.8

0.95

1300

0.96

1700

Noise CF 9 dB

8

11.6

0.98

2550

4

8.2

0.97

1800

Noise CF 6 dB

8

13

4

8.8

0.99

2900

0.98

1950

Sine wave max. 1 s

8

16.6

–

–

4

16.5

–

–

Output power [W] –
–
–
–
–
1000 1200
2000 1300
2300 1400
–

Power loss [W] 13.5
20.8
52.6
103
127
300 500
550 500
600 550
–

BTU/hr kCal/hr

46

12

71

18

179

45

351

89

433

109

1024

258

1706

430

1876

473

1706

430

2047

516

1876

473

–

–

–

–

208 VAC / 60 Hz / 0.5 Source impedance – all channels driven

State

Load Mains [ohms] current
[A RMS]

Power factor

Input power
[W]

Standby

–

0.28

0.20

11.9

Standby/Wake on Audio

–

0.32

0.32

20.8

ReadyStandby

–

0.46

0.53

50.2

Eco

–

0.86

0.54

97

Idling

–

0.82

0.74

126

Noise CF 12 dB

8

6.8

4

8.8

0.96

1350

0.96

1750

Noise CF 9 dB

8

13.1

0.98

2600

4

9.2

0.98

1850

Noise CF 6 dB

8

13.7

0.99

2750

4

9.9

0.98

2000

Sine wave max. 1 s

8

18.4

–

–

4

18.4

–

–

Output power [W] –
–
–
–
–
1000 1200
2000 1300
2100 1400
–

Power loss [W] 11.9
20.8
50.2
97
126
350 550
600 550
650 600
–

BTU/hr kCal/hr

41

10

71

18

171

43

331

83

430

108

1194

301

1876

473

2047

516

1876

473

2218

559

2047

516

–

–

–

–

10

d&b 40D Reference manual 1.3 en

Technical specifications

120 VAC / 60 Hz / 0.2 Source impedance – all channels driven

State

Load Mains [ohms] current
[A RMS]

Power factor

Input power
[W]

Standby

–

0.23

0.41

11.4

Standby/Wake on Audio

–

0.32

0.50

18.8

ReadyStandby

–

0.60

0.72

52.0

Eco

–

1.44

0.60

104

Idling

–

1.26

0.86

130

Noise CF 12 dB

8

12.1

0.96

1350

4

15.9

0.96

1800

Noise CF 9 dB

8

18.8

0.98

2100

4

16.6

0.98

1900

Noise CF 6 dB

8

19.7

0.99

2250

4

17.7

0.98

2000

Sine wave max. 1 s

8

25.2

–

–

4

27.7

–

–

Output power [W] –
–
–
–
–
1000 1200
1600 1300
1650 1400
–

Power loss [W] 11.4
18.8
52.0
104
130
350 600
500 600
600 600
–

BTU/hr
39 64 177 355 444 1194 2047 1706 2047 2047 2047 –

kCal/hr
10 16 45 89 112 301 516 430 516 516 516 –

100 VAC / 60 Hz / 0.2 Source impedance – all channels driven

State

Load Mains [ohms] current
[A RMS]

Power factor

Input power
[W]

Standby

–

0.21

0.49

10.3

Standby/Wake on Audio

–

0.34

0.55

18.7

ReadyStandby

–

0.65

0.75

48.2

Eco

–

1.54

0.61

94.8

Idling

–

1.45

0.88

128

Noise CF 12 dB

8

14.9

0.97

1400

4

19.9

0.96

1850

Noise CF 9 dB

8

21.2

0.98

2000

4

20.8

0.98

1950

Noise CF 6 dB

8

21.0

0.99

2000

4

21.1

0.99

2000

Sine wave max. 1 s

8

30.3

–

–

4

32.7

–

–

Output power [W] –
–
–
–
–
1000 1200
1450 1300
1450 1350
–

Power loss [W] 10.3
18.7
48.2
94.8
128
400 650
550 650
550 650
–

BTU/hr
35 64 164 323 437 1365 2218 1876 2218 1876 2218 –

kCal/hr
9 16 41 82 110 344 559 473 559 473 559 –

d&b 40D Reference manual 1.3 en

11

Overview

4.1 Connections

Overview

[1] Mains connector socket.
Refer to Þ Chapter 5.2.1 “Mains connection” on page 14. [3] Output connectors. [2] Audio INPUT (analog/digital) and

Refer to Þ Chapter 5.2.3 “SPEAKER

LINK connectors.

OUTPUTS” on page 16.

Refer to Þ Chapter 5.2.2 “Audio

input and output connectors”

on page 15.

[4] ETHERNET.
Refer to Þ Chapter 5.2.4 “ETHERNET (Dual Ethernet port)” on page 17. [5] GPI /GPO connector.
[6] Refer to Þ Chapter 5.2.5 “GPI/GPO (Hardware description)” on page 18. [7] FAULT connector.
Refer to Þ Chapter 5.2.6 “FAULT” on page 18.

4.2 Controls and indicators – User interface

[9] User interface / Status indicators Refer to [8] RESET
Refer to Þ Chapter 5.3.1 “RESET (System reset)” on page 19

12

d&b 40D Reference manual 1.3 en

Startup

Startup
5.1 Rack mounting and cooling
Rack mounting The enclosure is designed to fit standard 19″ equipment racks or cabinets.
NOTICE!
When mounting the device into 19″ equipment racks or cabinets, it is strongly recommended that you: Always fix the device at its front AND rear-mounted
rack ears using appropriate rack mounting screws and U washers, as shown in the graphic opposite. Alternatively use shelves fixed to the inner sides of the equipment rack or cabinet.
Cooling Thermal conditions are a vital factor to ensure operational safety of the power amplifiers. The amplifiers are equipped with two internal fans that draw cool air from the front into the housing and channel the warm air towards the back of the device. Please ensure that adequate cool airflow is provided. Do not block or cover the front panel air intake or the vents on
the rear panel. If the amplifiers are installed in sealed cabinets (e.g. in fixed
installations), use additional fan modules with filters that can be easily replaced without opening the sealed cabinets. Do not combine the amplifiers with D6 or D12 amplifiers in one rack. Do not rack up the amplifiers together with other devices producing additional heat with opposing airflow.

d&b 40D Reference manual 1.3 en

13

5.2 Connections

Startup

5.2.1 Mains connection
WARNING! Potential risk of electric shock or fire.
The device is a protective class 1 unit. A missing earth (ground) contact may cause dangerous voltages in the housing and controls and may lead to electric shock. Connect the device to mains power supplies with protective
earth only. If there is any sign of obvious damage to the power cord
and/or mains plug, do not use the power cord and replace it before further use. Please ensure the mains connector is accessible at any time to disconnect the device in case of malfunction or danger. If the mains plug is not readily accessible due to mounting in a 19″ rack or equipment cabinet, then the mains plug for the entire rack or cabinet must be readily accessible. Do not connect or disconnect the mains plug under load.
Before connecting the device to mains voltage, check that the mains voltage and frequency correspond to the specifications on the rating label next to the mains connector socket on the rear panel of the unit.
Mains voltage range: 100 to 240 VAC, ~50/60 Hz, 1800 W.
A powerCON® TRUE 1 TOP mains connector socket [1] is fitted on the rear panel and an appropriate power cord [1.1] is supplied.

14

d&b 40D Reference manual 1.3 en

Startup

5.2.2 Audio input and output connectors The rear panel features eight installation specific Phoenix Euroblock connectors with the following assignments:
four analog inputs (A1 – A4) two digital AES3 inputs (D1/2 and D3/4 – four channels) with
corresponding LINK outputs.

Each input channel can be routed to any of the output channels A to D Þ Input routing.

Analog INPUT (A1 – A4)
A 3-pin Phoenix Euroblock connector (male) is provided for each analog input to accept the supplied 3-pin Phoenix Euroblock connector (female). To feed (link) the input signal on to the next device in the signal chain, the connector can also be used as a cable tap.

Specifications Pin assignment

( ) GND, neg., pos.

Input impedance

32 kOhms, electronically balanced

CMRR @ 100 Hz/1 kHz/10 kHz

80/>80/>70 dB

Maximum input level (balanced/unbalanced)

+25/+18 dBu

+27.3 dBu @ 0 dBFS

Digital INPUT and LINK (D1/2 – D3/4)
A 3-pin Phoenix Euroblock connector (male) is provided for each pair of digital inputs to accept the supplied 3-pin Phoenix Euroblock connector (female).

The corresponding digital LINK output (1/2, 3/4) can be used to feed a refreshed input signal to the next device in the signal chain. The signal shape (the rising and falling edges of the signal) and level are refreshed with an analog buffer amplifier.

A power fail relay is incorporated to prevent interruption of the signal chain should there be a power failure. In this situation, the digital input signal bypasses the analog buffer amplifier and is routed directly to the LINK output.

Specifications Pin assignment

( ) GND, AES Signal, AES Signal

Input impedance

110 ohms, transformer balanced

Sampling frequency

44.1 | 48 | 96 | 192 kHz

Word length

16 – 24 bit

Digital LINK (D1/2, D3/4)

3-pin Phoenix Euroblock male

electronically balanced

analog signal buffering (refresh), power fail relay (Bypass)

d&b 40D Reference manual 1.3 en

15

Startup
5.2.3 SPEAKER OUTPUTS
WARNING! Potential risk of electric shock or fire.
Risk of electric shock The amplifier output pins can carry dangerous voltages. Only use isolated loudspeaker cables with correctly fitted
connectors. Never connect an amplifier output pin to any other input or
output connector pin or protective earth (ground). Bridge mode is not applicable. Risk of fire To avoid any heating of the output connector terminal (glowing contact), the wires need to be properly fitted to the output connector terminal. Only use the enclosed Phoenix Euroblock connector terminals
[3]. Observe the maximum cross-section of 6 mm2 (AWG 10). Ensure all contact screws are properly tightened.
Recommended torque settings (min/max): 0.7/0.8 N×m. Ensure the fixing screws of the connector terminal are properly
fitted to the output connector socket of the device.
The amplifier is equipped with two Phoenix Euroblock connector sockets (female), one for each pair of amplifier output channels (A/B, C/D).
All pins of both output connectors are hardwired and permanently driven using the following pin assignment.
SPEAKER OUTPUTS A (B, C, D) + = Amp A (B, C, D) pos. — = Amp A (B, C, D) neg.

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Star topology

Startup

5.2.4 ETHERNET (Dual Ethernet port)

NOTICE! Only shielded network cables (STP) must be used!

The device allows standard remote control via the d&b Remote network using the d&b R1 Remote control software or the integrated Web remote interface. For this purpose, use the upper RJ45 (ETHERNET 1/PRI) connector socket (1 Gbit/s/100 Mbit/s ­ peer-to-peer) requiring star topology network wiring. Daisy-chaining is not supported.
Note: The bottom RJ45 connector socket (ETHERNET 2/SEC) is not enabled but is reserved for future feature implementations.

LED indicators
The two LED indicators above the respective connector in use indicate the following states:

Green Yellow

Illuminates permanently when the device is connected to an active network and flashes as long as a data stream is transmitted.
Is off when the speed is 100 Mbit/s. Illuminates permanently when the speed is
1 Gbit/s.

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17

GPI | GPO Schematic circuit diagrams and logic level chart (GPI)
FAULT Schematic circuit diagram and switching status: a) Device is On and operating b) Device is Off or general device error
18

Startup

5.2.5 GPI/GPO (Hardware description) Up to eight opto-coupled GPI pins [5] (General Purpose Input) and up to four GPO pins [6] (General Purpose Output) are available as additional digital control lines. This enables external control and detection functions.
Note: A detailed description of how to configure the GPIOs and assign the available software objects (functions) correspondingly is given in Þ Chapter 6.2 “GPIO Configuration” on page 25.

Each GPI provides either level (Hi/Lo active – non-latching) or edge (rising/falling – latching) triggering.
Note: When using a GPI or GPO contact, observe the following:
An external DC power supply is required. GPI: The corresponding pin is connected via an opto-
coupler with a serial resistance of 5.4 k. GPO: The corresponding pin is connected to ground
(GND/ ) via a relay (Low-Side-Switch). Make sure the current per GPO pin does not exceed 1 A.

Technical specifications

External power supply

24 VDC ±25% (18 ­ 30 VDC)/150 W

GPI

8 x Opto-coupled (galvanic isolation)

High-level

18 … 30 VDC

Low-level

0 … 9 VDC

Serial resistance

5.4 kOhms

Forward voltage drop (Uf (max.))

3.7 V

Input current draw per pin @ 9/18/24/30 VDC

1.5/2.6/3.7/4.8 mA

Connector type

1 x 9-pin Phoenix Euroblock male

Pin assignment

( ) GND, GPIs 1 ­ 8

GPO High-state Low-state Max. current draw Connector type Pin assignment

4 x Low-Side-Switch-Relay Closed (connected to common GPO GND)
Open (high resistive) 1 A/Total: 4 A
1 x 5-pin Phoenix Euroblock male ( ) GND, GPOs 1 ­ 4

5.2.6 FAULT An additional 3-pin Phoenix Euroblock fault contact [7] is provided allowing a general device error to be remotely indicated.
Note:
The assignment of the corresponding software object is fixed and cannot be changed by the user.
During a firmware update, the fault contact switches to status b), as shown in the graphic opposite.

NO Normally Open

C

Common

NC Normally Closed

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d&b 40D Reference manual 1.3 en

5.3 Controls and indicators

Startup

5.3.1 RESET (System reset) A reset button (RESET [8]) is located on the rear panel next to the digital LINK D3/D4 connector terminal. To prevent accidental system reset, the button is slightly recessed. To perform a system reset, proceed as follows:
Note: All device preferences will be set to factory defaults except for the network and fixed device settings.
1. Isolate the device from mains power by releasing the powerCON connector and turn it counterclockwise.
2. Press and hold the «RESET» button using an appropriate pen. 3. While holding the «RESET» button pressed, repower the
device by turning the powerCON connector clockwise. Long confirmation beep. 4. Release the «RESET» button and briefly press the button again within 2 sec. Short confirmation beep Þ the device will reboot.
5.3.1.1 Network reset option (IP settings) Executing the following reset procedure allows you to locally change/edit the network (IP) settings, if required. Once the settings have been changed and the device has been shut down, the access to the network settings will be disabled again after repowering the device. 1. During normal operation, press and hold the «RESET» button
for 5 sec. Long confirmation beep. 2. Release the «RESET» button and briefly press the button again within 2 sec. Short confirmation beep.
The network settings will become accessible for editing by tapping the «Network» navigation button as shown in the graphic opposite.
19

Screen access and structure chart

Startup
5.3.2 TFT color touchscreen – User interface
NOTICE!
The touch panel utilizes a thin flexible sheet that may be damaged by sharp objects or heavy treatment.
The user interface consists of a 4.3″ TFT color touchscreen [9] with a resolution of 480 x 272 pixels. The resistive touchscreen responds to pressure and therefore can be operated by a fingertip, even when wearing gloves or by an appropriate stylus tip (pen).
Screen contents The display provides comprehensive information regarding the channel settings/statuses as well as the device settings/statuses. The structure of the screen content(s) is divided into two main axes, the «Home» view, including the «Channel» settings/statuses, and the «Device» settings/statuses views. Accessing the screen contents Þ To access a particular subscreen, simply tap ( ) the
corresponding screen item, shown as an example in the graphic below.

5.4 Screen contents
5.4.1 Home From the Home screen, the screen structure is divided into two main sections (axes), the Header and Data (Channel strip) sections.
The navigation buttons allow for vertical access to the subscreens while the tab structure on the right side of each subscreen provides a clear horizontal order.
In addition, the header gives direct access to the Network subscreen.
The Home screen can be accessed from any subscreen at any level using the Home button ( ).
Header The header section features the most vital device status information. This includes (from left to right):

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d&b 40D Reference manual 1.3 en

Startup

1. Power-on indicator

Yellow: Indicates the start-up phase of the power supply.

Green: Indicates that the device is switched on.

Grey: Indicates that the device is in standby mode.

Red:

Indicates a device error.

2. Device name and output mode settings
This navigation button provides direct access to the Þ Input subscreen.

3. Network settings and status
This navigation button provides direct access to the Þ Network subscreen.

OCA IP:

Green: The device is connected to the d&b Remote network and R1 is in «Online» mode.
Black: The device is not connected to the d&b Remote network or R1 is offline.
IP adress.

ID: Remote ID.

In addition, the network speed is indicated by dedicated LEDs with the following color code:

Green 1 Gbit/s network. Yellow 10/100 Mbit/s network.

Grey No link up.

4. Additional information field regarding the power on status of the device.

Data – Channel strips The data section features the actual channel strips starting with the input connector and then following the real signal flow from left to right. All vital information is displayed. This includes:
1. Input signal present (ISP).
2. Channel configuration and signal status (ISP/GR/OVL).
3. Channel mute status.
4. Error messages.

5.4.2 Input The data section of the Input subscreen provides the following information:
1. The Fallback and Override settings.
2. Input metering for both the digital (AES (D)) and analog (Analog (A)) inputs.
3. Underneath the meter bars the input monitoring (IM) status is indicated by a dedicated LED with the following color code: Grey IM not activated Blue IM activated Red IM fault
A corresponding error message will be issued in the header of the Home screen and in addition, the affected channel is indicated within the ISP indicators on the left of the data area.

21

Startup

5.4.3 Output The data section of the Output subscreen provides the following information:
Note: The values indicated in the graphic opposite do not correspond to real- world conditions.

1st line Speaker Input Output GR/ Headrm.
Impedance Power Temperature ISP/OSP
GR/OVL
Mains/SMPS

Mute status of each channel.

Loudspeaker setups selected for the individual channels.

Actual input signal levels of the individual channels.

Actual output voltages of the individual amplifier channels.

Relationship between headroom (Headrm.) and gain reduction (GR) with peak hold for 1 sec.

Display ranges:

GR:

0 dB Þ +32 dB.

Headrm.: ­32 dB Þ 0 dB.

Actual load impedance values for the individual amplifier channels.

Power actually delivered by the individual amplifier channels.

Actual temperatures of the individual amplifier channels.

Indicates whether the input signal (ISP) as well as the amplifier output signal (OSP) of the individual channel are present.

Indicates whether gain reduction (GR Yellow) of the respective channel is active or the respective channel is overloaded (OVL Red).

Displays the actual mains voltage and frequency followed by the actual power consumption of the power supply.
In addition the actual temperature of the power supply is indicated.

5.4.4 Network
The data section of the Network subscreen provides the following information:

Mode: IP: IP mask: IP gateway: MAC:
Status: Remote ID

Actual IP mode. Actual IP settings.
Displays the fixed MAC address of the device. Provides status information on the network. Unique Remote identifier of the respective device in the format [nn].[nn]. The first two digits represent the Subnet. Within the network up to 100 subnets can be defined (values 0 to 99).

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Startup

The following two digit represents the Device ID for each subnet (values 1 to 63).

In addition the network speed is indicated by dedicated LEDs with the following color code:

Green Yellow Grey

1 Gbit/s network. 10/100 Mbit/s network. No link up.

5.4.5 More
In the More subscreen, additional information is provided via further navigation buttons (subscreens) and information fields.
In addition, the current firmware version («Firmware CO») and the «Serial number» of the devices are indicated at the bottom of the screen.

5.4.5.1 GPIO The data section of the GPIO subscreen provides a general overview of the assigned functions and the actual statuses of both the GPI and the GPO contacts at one glance.
In addition, a more detailed view is provided on separate tabs for either the GPI or the GPO configurations (Mode/Function) and their current states.
Status Three status LEDs are provided indicating the following states:
1. The first LED indicates the status of the GPIOs.
For GPIs the logical status and for GPOs the status of the relay ( ).
2. The second LED indicates the status of the related Object (binary object) or AmpPreset ( ).
3. The third LED illuminates as soon as an error has occurred ( ).

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Startup
5.4.5.2 Event log The event log stores a maximum of 10000 records. Once the maximum number of records is reached, the system starts deleting the first ones.
5.4.5.3 AmpPresets The number of the currently active AmpPresest is shown.

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Device configuration

Device configuration
6.1 Initial device setup The device is mainly intended to be set up and operated via the d&b Remote network using the d&b R1 Remote control software. Provided R1 is already installed and the device has been connected either directly or through the network, proceed as follows:
Þ From the startup menu, choose the «R1 V3 Initial device setup» entry. R1 is launched and automatically switches to «Online» mode and the «Service» view is displayed. In the left pane of the view, the connected device is listed. In the right pane, the corresponding «Filter» Þ «Initial device setup» is set by default and provides you with basic parameters (in alphabetical order) to set up the device.
6.2 GPIO Configuration 1. To configure the GPIOs, switch R1 to «Configuration»
mode. 2. From the «System views» select «Service».
R1 enters the «Service» view with the «Interfaces» tab being active.
3. Select the «Devices» tab. In the right pane of the «Service» view the «Properties» tab becomes accessible
4. From the «Filter» drop-down list select «GPIOs» or «Initial device setup» The table will become accessible indicating the GPI/GPO states and providing the related parameter function and mode.

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25

GPI function
Display only Mainly intended as Debug function. Displays the status of the respective GPIO without any assignment to Objects or Presets.
Power on Channel mute (Mute Ch A … Mute Ch D, Mute all) AmpPreset 1 … 15 Alarm preset 1 … 3 Backup 1 … 3 Input Fallback/Input Override
GPO function
Mains Voltage OK Power OK
Indicates when the power amplifier stage has reached its full rail voltage and the device is ready for operation (Þ not Standby). Channel error Ch A Error … Ch D Error, Error Ch any (cumulative output) Channel protection Ch A Protection … Ch D Protection, Protection Ch any (cumulative output) Internal Error Indicates an internal error of the device which causes an interruption of the audio signal. Explicitly excluded are “Load monitoring, System check and Overvoltage or Undervoltage” conditions/states. Channel mute (Mute Ch A … Mute Ch D, Mute any, Mute all)

Device configuration

Within the «GPIOs» table, the parameter are listed for either GPIs and GPOs.

GPI state GPO state
GPI internal state GPO internal state GPI function GPO function GPI mode GPO mode

The GPIO state corresponds to the voltage applied in relation to the selected GPI mode. The GPIO internal state depends on the selected GPI/O function.
Assigns the corresponding function (Object). Trigger/switching behavior of the corresponding GPI/GPO contact. It can be combined with either level (non- latching) or edge (latching) triggering, as detailed below.

GPI mode Off: The corresponding GPI contact is disabled. Input, level, lo: Level triggered – Lo active Input, level, hi: Level triggered – Hi active Input, edge, rising: Edge triggered – rising Input, edge, falling: Edge triggered – falling –

GPO mode Off: The corresponding GPO contact is disabled.
Output, level, NO: Level triggered – normally open (NO)
Output, level, NC: Level triggered – normally closed (NC)
GPO manual control: Manual operation (hand control). Mainly intended for test purposes.

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Device configuration

Status Three status LEDs are provided indicating the following states:
The first LED indicates the status of the GPIOs.
For GPIs the logical status and for GPOs the status of the relay.
For outputs, the logical status is “1” ( ) when the relay is closed.
For edge triggered inputs, the internal Object/AmpPreset states are the same as the GPI status and vice versa.
For outputs in “NO” mode (normally open), the statuses of the Object and GPO are the same. In “NC” mode (normally closed), the status of the GPO is inverted.
For level triggered inputs, the GPI status is defined by the external voltage applied. However, the triggered Object/AmpPreset can be changed for whatever reason, i.e. an AmpPreset was modified or an AmpPreset, which is defined for a dedicated GPI is loaded.

The second LED indicates the status of the related Object (binary object) or AmpPreset.
Objects/AmpPresets and GPIs are evaluated separately.
For Objects, the logical status is “1” ( ) when the Object is logical “1” (binary object).
For AmpPresets, the logical status is “1” ( ) when the AmpPreset is loaded and not modified.

The third LED illuminates as soon as an error has occurred ( ).
Provided the corresponding GPI/GPO is selected, a corresponding message will be issued on the bottom left of the GPIO screen.

Recommended and tested browsers:

Windows:

Firefox V22.0 or higher Microsoft Internet Explorer V11 or higher Microsoft Edge V12 or higher Google Chrome V21 or higher Opera V15 or higher

macOS:

Safari V6.0 or higher Firefox V22.0 or higher Google Chrome V21 or higher Opera V15 or higher

iOS:

iOS 6 or higher

Android:

Mobile Firefox V27.0 or higher Android Browser V4.4 or higher

6.3 Web Remote interface Alternatively, the integrated Web Remote interface also provides direct access to the user interface using a standard web browser. The Web Remote interface is mainly intended for configuring a single device.
Note: A detailed description of the Web Remote interface is given in Þ Chapter 7 “Web Remote interface” on page 28.
Physical setup and direct connection Simply connect the LAN connector port of your computer to the upper RJ45 (ETHERNET 1/PRI) connector socket [4] of the device. By factory default, the IP address is set to: 192.168.1.40. To access the device, manually assign an IP address to the computer in your network in the same subnet as the device. 1. Navigate to the network settings of your computer associated
with your network adapter. 2. Open the corresponding network properties dialog. 3. Enter a static IP address (e.g. 192.168.1.11) in the same
subnet (255.255.255.0) as the device. 4. Confirm the changes and close the network properties dialog. 5. To display the Web Remote interface page of the device,
enter its IP address (192.168.1.40) in the address bar of your web browser.

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27

Web Remote interface

Web Remote interface

In addition, a Web Remote interface is integrated which provides direct access to the user interface of a single amplifier using a standard web browser.
Note: The user interface of the amplifier can only be accessed after connecting the amplifier to a computer via Ethernet. It is possible to connect the computer and the amplifier directly, however, this requires the IP mode DHCP+LL.
The use of a router with DHCP server is recommended for setting up the network connection. If the router also provides a wireless access point, the amplifier may also be controlled using mobile devices.

Recommended and tested browsers:

Windows:

Firefox V22.0 or higher Microsoft Internet Explorer V11 or higher Microsoft Edge V12 or higher Google Chrome V21 or higher Opera V15 or higher

macOS:

Safari V6.0 or higher Firefox V22.0 or higher Google Chrome V21 or higher Opera V15 or higher

iOS:

iOS 6 or higher

Android:

Mobile Firefox V27.0 or higher Android Browser V4.4 or higher

Remote control
To enable remote control via the Web Remote interface, proceed as follows:

1. Establish a connection between the network connector of the amplifier and the router.
After a while, the «Remote» tab of the amplifier screen will display the IP address the DHCP server has assigned to the device.

2. Type this address into the address field of the browser or the mobile device that is connected to the network.
In this case: 10.5.2.78

3. For multiple amplifiers, open one browser tab for each amplifier connected and apply the corresponding IP address.

Web Remote interface page The Web Remote interface page is split into four tabs: the «Web Remote», «Event log», «Commands» and «Service» tabs.
Web Remote tab The «Web Remote» tab shows the actual screen of the connected amplifier.
All screens and screen items can be accessed by simply clicking the relevant item.

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d&b 40D Reference manual 1.3 en

Web Remote interface
Password dialog Once the device is locked with a password, the Web Remote interface is also locked and can no longer be accessed. A corresponding dialog will pop up to allow you to unlock the device.
Event log tab The «Event log» stores a maximum of 10000 records. Once the maximum number of records is reached, the system starts deleting the first ones Þ Ring buffer. The number of records displayed depends on the size of the browser window.
Located on the right-hand side of the record list are various Navigation buttons allowing you to scroll through the list using the «Page Up/Down» or «Line Up/Down» buttons or by directly jumping to the «Latest» record. In addition, the editable «Record» field allows you to enter a dedicated record number. The corresponding record will be displayed at the very bottom of the record list.
Storage option ( ) In addition, a storage option is provided which allows you to store the Event log data locally. This is mainly intended for service and/or troubleshooting purposes. To save the Event log data locally, proceed as follows: 1. Select the «Save» button at the bottom right corner of the web
browser window. A corresponding dialog will pop up providing you with a
drop-down list from which you can select either the number («Last [n]») of records or «All» records to be saved. 2. Choose the desired option from the drop-down list and select «Save». The event log data will be downloaded and the download progress will be displayed. Once the download is completed, a corresponding message will be displayed. 3. Select «Save» to store the Event log data locally. Your web browser will display the corresponding dialog and the file will be saved as Event.log to the local download directory you have specified in the download settings of your browser.
Commands tab This functionality is intended for service purposes only.
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Web Remote interface

Service tab The «Service» tab provides a «Backup»/«Restore» function for the complete device configuration.
Note: Backups can only be restored on devices of the same type and that have a matching firmware version.

Login

To access the service functions, you first have to log in.
If the device is locked by password protection, use the corresponding password to log in. If no password protection is applied, use “dbaudio” as a password.

Backup

Þ Select the «Download backup file from device» button to store the backup file (*.backup) locally.
Your web browser will display the corresponding dialog and the file will be saved to the local download directory you have specified in the download settings of your browser.

Restore

1. Select the «Upload backup file to device» button to upload the backup file onto the device.
Your web browser will display the corresponding dialog.
Once the backup file is uploaded, the «Remote ID» and «IP settings» become accessible and can be edited, if necessary by simply clicking into the corresponding input field..
2. As a final step, select the «Activate backup file on device» button to apply the backup and remote settings.

Log file collection

For service or trouble shooting purposes, a log file collection can be downloaded.
Þ Select the «Download log file collection» button to store the collection file (*.logpack.) locally.
Your web browser will display the corresponding dialog and the file will be saved to the local download directory you have specified in the download settings of your browser.

Logout

To exit the «Service» tab functions, click the «Logout» button at the top.

Licenses and Copyright
Selecting the d&b logo at the top left opens the «Licenses and Copyright» information page.

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Operation

Operation (Hardware references)

8.1 Power supply The device utilizes a switch mode power supply with active Power Factor Correction (PFC) and automatic mains range selection.
The power supply is equipped with mains voltage monitoring, overvoltage and undervoltage protection as well as an inrush current limiter.

8.1.1 Active Power Factor Correction (PFC)
The active Power Factor Correction provides a clean and highly efficient sinusoidal current draw, thus providing highest performance under adverse mains conditions or when very long power cabling is necessary. The power factor is above 0.9 for mains power consumption values of 350 W or higher.

8.1.2 Mains voltage monitoring
The mains voltage and frequency are recorded by the power supply and can be viewed on screen. Where voltages outside of this range are present, a self- resetting protective circuit responds quickly to isolate the internal “Main Power Supply” leaving only a supervisory circuit running to monitor the mains voltage. The device accepts mains voltages of up to 400 VACRMS without damage to the device in case of a missing neutral line or running phase to phase.

8.1.3 Automatic mains range selection The automatic mains range selection enables the device to be used with any mains supply worldwide without the need for manual action. The automatic range selection is only available on plug-in but not during operation. Once in high or low range, the SMPS expects a permanent mains voltage in this range. To switch from one range to the other, the unit must be disconnected from the mains.
The power supply incorporates a “Mains Power Supply” and an “Auxiliary Power Supply”.
Mains Power Supply The Mains Power Supply feeds the power amplifiers within the following nominal mains ranges:

High range Low range

208 – 240 VAC 100 – 127 VAC

Auxiliary Power Supply
The Auxiliary Power Supply feeds the DSP section and the device control and operates within the range from 55 VACRMS to 400 VACRMS.

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Operation (Hardware references)

55 Ü

75

Undervoltage

Standby (Protection)

55

Þ

85

Ü

133

Low range

Operation

Þ

140

Behavior with fluctuating mains voltages With mains voltages other than the nominal voltages specified above, the device switches to the adequate mode for either “Standby” (Protection) or “Operation”.
The voltage thresholds are dependent on the slope of the mains voltage change.

Undefined
Standby (Protection)

170

Ü

High range

Operation

190

Þ

266

Ü

400

Overvoltage

Standby (Protection)

276

Þ

400

Undervoltage Undefined Overvoltage

Depending on the operating state, the device will be switched to Standby mode (Protection).

NOTICE!
In Overvoltage state with mains voltages above 400 V, damage to the device cannot be excluded.
In Undervoltage state, the Auxiliary Power Supply for the device control operates down to 55 VACRMS.
Up to this threshold …: The display remains active and the device can be operated
locally. The LED indicators on the front panel remain active. Remote control via web remote or R1 is still possible without
restrictions. Below this threshold, the device will be switched off.
8.1.4 Mains inrush current limiter The Main Power Supply is started softly to limit inrush current. Up to two 40D may be powered up at the same time without triggering a line circuit breaker of 13 – 16 A (@ 230 V) or 20 A (@ 100 – 120 V) respectively.
8.1.5 Mains supply requirements Due to its automatic mains voltage selection, the amplifier can be fed from all usual mains voltages within the rated ranges as stated in Þ Chapter 8.1.3 “Automatic mains range selection” on page 31.
For the average and peak current requirements for specific mains voltages please refer to Þ Chapter 3.1 “Current/power draw and thermal dissipation” on page 10.
To ensure safe and stable operation, observe the following recommendations and specifications: Operate a single amplifier on a 13 A circuit breaker at 208 to
240 V (high range) or on a 20 A circuit breaker at 100 to 127 V (low range). Operate the amplifier at a high-range supply (208 to 240 V), if possible. A low-range supply (100 to 127 V) requires a cable cross section that is 4 times higher to achieve comparable power performance.

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Operation (Hardware references)

When three amplifiers are operated with a three-phase (120°) mains supply, the current on the N (neutral) conductor can be minimized by matching loads and signals between the three devices.
Keep the supply line as short as possible and its cross section as high as possible, especially when operating the device at 100 to 127 V. Voltage drop at full load (20/13 A at 115/230 V) should not exceed 5 %. For reference specifications, refer to the following table.

Maximum cable lengths for 5 % voltage drop at 3600 W mains power draw

Cable cross section 100 V

120 V

208 V

1.3 mm2 – AWG 16

Not permitted

Not permitted

21 m/69 ft

1.5 mm2

Not permitted

Not permitted

24 m/79 ft

2.1 mm2 – AWG 14

Not permitted

Not permitted

33 m/108 ft

2.5 mm2

Not permitted

Not permitted

40 m/131 ft

3.3 mm2 – AWG 12

12 m/39.5 ft

18 m/60 ft

53 m/174 ft

4.0 mm2

15 m/50 ft

21 m/69 ft

63 m/206.5 ft

5.3 mm2 – AWG 10

19 m/62 ft

28 m/92 ft

83 m/272 ft

6.0 mm2

22 m/72 ft

32 m/105 ft

95 m/312 ft

8.4 mm2 – AWG 8

31 m/101 ft

44 m/144 ft

133 m/436 ft

230 V 25 m/82 ft 29 m/95 ft 40 m/131 ft 49 m/161 ft 64 m/210 ft 78 m/256 ft 102 m/334.5 ft 116 m/380.5 ft 162 m/531.5 ft

8.1.6 Generator operation/UPS requirements
To operate the amplifier using a mains generator or uninterruptible power supply (UPS), observe the following:
With the 40D amplifier the apparent power figure (VA value) is about the same as the effective power figure (W value).
Use a generator or UPS that can deliver the maximum power required by the entire system. Assume a short time power draw of 3 kVA per 40D. This is particularly important when using a UPS without dedicated short-time overload capability.
Run the generator or UPS at 220 to 240 V, if available. 50 or 60 Hz is not an issue.

8.2 Power amplifiers
The power amplifiers fitted to the 40D utilize Class D technology similar to a switch mode power supply. Compared to the known linear amplifier concept (Class A, AB, G or H), Class D power amplifiers produce less heat and allow for a compact and lightweight design.
While supplying very high maximum output swing, they maintain high efficiency with any kind of signal and load and run as cool as possible. Channels share the same power supply and are thermally coupled to provide even higher average power figures when unevenly loaded. TOP/SUB setups and active cardioid subwoofers are cases of typical use. A sophisticated circuit design decreases the impact of the load on the amplifier performance and enables a well defined sound reproduction. A comprehensive set of protection features individually prevents each channel from overload and/or damage/fault. Channels that are not affected will continue to operate, if safely possible.

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Operation (Hardware references)
8.3 Cooling fans Two temperature and level controlled fans are incorporated for cooling the internal components, which allows greater cooling during louder program material. The fan speed is consequently reduced during quieter passages preventing background noise interference. If the unit heats up a «Temp. Warning» is issued and the fans will give full cooling power permanently.

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Service/Maintenance and care

Service/Maintenance and care
9.1 Service
CAUTION! Potential risk of explosion.
The device incorporates a lithium battery which may cause danger of explosion if not replaced correctly. Refer replacement only to qualified service personnel authorized by d&b audiotechnik.
Do not open the device. No user serviceable parts inside. In case of any damage do not operate the device under any circumstances. Refer servicing only to qualified service personnel authorized by d&b audiotechnik. In particular if: objects or liquids have entered the device. the device does not operate normally. the device was dropped or the housing is damaged.
9.2 Maintenance and care During normal operation, the amplifier provides maintenance-free service. Due to the cooling concept, no dust filters are required. As a result, filter exchange or cleaning the filters is not necessary. However, the air-intake is covered by a grill which should be regularly cleaned (vacuumed) using an appropriate vacuum cleaner.
9.2.1 Touchscreen cleaning After a certain period of time, the touchscreen may require cleaning. For this purpose, proceed as follows: Use a soft cloth only. Do not use any solvent cleaners. To remove very heavy dirt from the panel, it may be helpful to use a special cleaning spray for TFT screens. In this case, proceed as follows: 1. Spray on the soft cloth before wiping the screen.
Never apply/spray directly on the screen as the liquid could penetrate the device.
2. Wipe the screen with moderate pressure.

d&b 40D Reference manual 1.3 en

35

ID 11 15 16 19 20 21 25 27
28 30 32-34 35 36 37
38
39

Service/Maintenance and care

9.3 Possible error messages
The following table lists possible error messages appearing within the Web Remote interface ordered by the error Id.

Display text

Eventlog text

Description

Location

Possible reasons

System error 128

System error 128 (I2C, IC 0x%02X, Pos %d)

Internal I2C comm. DS error

Internal hardware or software fault

Unknown device type Unknown device type Unknown device type %d

Wrong or missing serial No.

Invalid device ident Invalid device ident Invalid hardware

%d

configuration

ADDAC, Amp, SMPS Missing or wrong module identification

Invalid display ident Invalid display board Invalid DISPLAY

ident %d

identification

Display

Missing or wrong DISPLAY identification

Program error %u Program error %d, Program error

DSP

%d, %d, %d

Various

Invalid DSP Data

Invalid DSP database Invalid DSP data

DSP

(Position %d, Error

%d)

Software error

Program error %u Program error %d: Program error

DSP

AWL error %d in

AWL %d, line %d

Various

SMPS in bootloader SMPS stuck in bootloader

Software missing on SMPS SMPS controller

Firmware update failed or flash corruption, retry update

SMPS comm. error

SMPS communication SMPS comm. error SMPS error (error %04X) Missing keepalive for
1 sec

SMPS fault or internal communication disturbed

SMPS temp. error %d SMPS temperature Critical SMPS

°C

error %3d°C (power temperature

%uW)

SMPS

Insufficient cooling

SMPS supply error

SMPS supply error XXXVXXX (%5dmV, err %04X)

Supply voltage out of SMPS range

Fluctuating mains voltage, SMPS fault

SMPS ZK1 overvoltage

SMPS supply error Zk1 overvoltage (Zk1 %3dV, %04X)

Supply voltage out of SMPS range

Mains surge

Mains surge detected SMPS surge restart (Zk1 peak %3dV, Mains peak %3dV)

SMPS

Rapid surge on mains voltage

Mains undefined range

Mains undefined

Mains voltage out of SMPS

range (avg %3dV, err range at startup

%04X)

Refer to: Þ Chapter 8.1 “Power supply” on page 31

SMPS overcurrent

SMPS overcurrent (i- SMPS overcurrent peak %3.1dA, avg %3dV, err %04X)

SMPS

Refer to: Þ Chapter 8.1 “Power supply” on page 31

Mains overvoltage

Mains overvoltage (avg %3dV, peak %3dV, err %04X)

Mains voltage too SMPS high for current range

Refer to: Þ Chapter 8.1 “Power supply” on page 31

36

d&b 40D Reference manual 1.3 en

Service/Maintenance and care

ID

Display text

Eventlog text

Description

Location

Possible reasons

40

Mains undervoltage Mains undervoltage Mains voltage too SMPS

Refer to:

(avg %3dV, peak low for current range

Þ Chapter 8.1

%3dV, err %04X)

“Power supply”

on page 31

41

Mains frequency faul Mains frequency fault Mains frequency out SMPS

External

(%3d Hz, err %04X) of range

43

SMPS restart error SMPS error: too

SMPS restart fault SMPS

An error prevents

many restarts (restart

startup or SMPS fault

count %d)

44

SMPS rail “Eco” erro SMPS rail “Eco” error SMPS rail “Eco” error SMPS

Power consumption

(i-peak %3.1dA, rail

too high in “Eco”

%3dV, err %04X)

45

SMPS rail startup SMPS rail startup SMPS rail error at SMPS

Power consumption

error

error (i-peak %3.1dA, startup

too high during

rail %3dV, err %04X)

startup phase

46

SMPS rail run error SMPS rail run error (i- SMPS rail error

SMPS

Power Consumption

peak %3.1dA, rail

too high in normal

%3dV, err %04X)

mode.

47

SMPS controller reset SMPS controller

SMPS controller

SMPS

Various

unexpectedly reset unexpectedly reset

(reason: %04X)

50

Invalid device para Channel ‘%c’: invalid Invalid device

DSP

Software error or

device parameters parameters

wrong device type

(device ident %d)

detected

51

Invalid DSP prog %u Channel ‘%c’ : invalid DSP program invalid DSP

Software error

DSP program %d

52

DSP boot error

Channel ‘%c’: DSP DSP boot error

DSP

DSP or software error

boot error (DSP

program %d)

53

DSP systick stall

DSP ‘%c’ system ticker DSP Systick stalled DSP

DSP or software error

stalled

58

DSP comm. error

Channel ‘%c’: DSP DSP comm. error

DSP

DSP fault or software

communication error

error

59

Invalid setup data Channel ‘%c’: invalid DSP invalid setup DSP

Software error

speaker setup

data

(speaker id %d, no.

%d, err %d)

61

Invalid AP slot %d Channel ‘%c’: invalid Invalid

AP slot %d (file

ArrayProcessing data

version %d)

Software error

78

Full amp. error.

Full amp. error

Full amp. error

SMPA

All channels show an

(SMPA AB %04X,

error

SMPA CD %04X)

79

Amp. in bootloader Channel ‘%c’ stuck in Amp. in bootloader SMPA

Firmware update

bootloader

failed or flash

corruption, Retry

update

80

Amp. comm. error Channel ‘%c’

Amp. comm. error SMPA

Communication

communication error No keepalive for 1

disturbed or SMPA

(error %04X)

sec

fault

82

Temperature error %d Channel ‘%c’

Critical amp. channel SMPA

Insufficient cooling

°C

temperature error %d temperature

°C (power %uW)

d&b 40D Reference manual 1.3 en

37

ID 83-87 88
89 90 91
92
93
94 95 96 97 98 99 100 124 150 160

Service/Maintenance and care

Display text

Eventlog text

Description

Location

Supply fault

Channel ‘%c’ supply Aux. supply voltage SMPA fault XXXX (err %04X, out of range %5dmV)

Overcurrent

Channel ‘%c’ output overcurrent (CL counter %3.1ukCnt, power %uW, temp. %d°C)

Overcurrent, Overvoltage on output

SMPA

DC on output

Channel ‘%c’ DC error

DC on output

SMPA

HF on output

Channel ‘%c’ HF error HF on output

SMPA

Ext. amp. error

Channel ‘%c’ ext. amp. reported an error (ext. err %04X, err %04X)

Ext. Amp. controller in SMPA protection

Ext. amp. no comm.

Channel ‘%c’ ext. amp. no communication (ext. err %04X, err %04X)

Ext. amp. no comm.

SMPA

Sudden overtemp.

Channel ‘%c’ sudden temporary overtemperature (ipeak %3.1dA)

Sudden temporary overtemperature on channel

SMPA

Overtemperature %d Channel ‘%c’

Channel mute due to SMPA

°C

overtemperature %d overtemperatur

°C (power %uW)

Clock fault

Channel ‘%c’ clock fault (%3.1ukHz, power %uW)

Clock fault

SMPA

Supply fault

Channel ‘%c’ supply Supply fault fault 220V (err %04X, %5dmV)

SMPA

Rail loss mute

Channel ‘%c’ muted due to rail loss (err %04X, %3.1dV)

Rail unexpectedly low SMPA

Mains loss mute

Channel ‘%c’ muted Mains unexpectedly SMPA due to mains loss (err not OK %04X, avg. %3dV)

Temp. warning %d°C Channel ‘%c’

High channel

SMPA

temperature warning temperature warning

%d°C (power %uW)

SMPS temp. warning SMPS temperature

%d°C

warning %3d°C

(power %uW)

High SMPS

SMPS

temperature warning

OCA remote error

OCA remote error %u

OCA remote error

Speaker imp. fault

Load Monitoring impedance error

Input fallback

Input fallback (A1= Input Fallback %d, A2=%d, D1=%d, D2=%d)

Possible reasons Hardware fault
Short curcuit on output
Hardware fault Software error
Current peak on output
Insufficient cooling
SMPA fault
Hardware fault, short on output, SMPA, SMPS fault Mains voltage loss
Mains voltage loss
Insufficient cooling
Insufficient cooling
Speaker or cable fault Input Fallback was activated

38

d&b 40D Reference manual 1.3 en

ID 161-164
165-168

Service/Maintenance and care

Display text

Eventlog text

Description

Input monitoring fault Input monitoring fault Input Monitoring AX (level %4.1ddBu, Fault threshold %4.1ddBu)

Input monitoring fault

Input monitoring fault Input Monitoring

DX (level

Fault

%4.1ddBFS, lock %d,

DS data pri %d, DS

data sec %d)

Location

Possible reasons Cabling
Cabling, routing, unlocked

d&b 40D Reference manual 1.3 en

39

Manufacturer’s declarations

Manufacturer’s declarations
10.1 Declaration of Conformity This declaration applies to:
d&b Z2830 40D Amplifier
by d&b audiotechnik GmbH & Co. KG.
All product variants are included, provided they correspond to the original technical version and have not been subject to any later design or electromechanical modifications.
We herewith declare that said products are in conformity with the provisions of the respective directives including all applicable amendments.
Detailed and applicable declarations are available on request and can be ordered from d&b or downloaded from the d&b website at www.dbaudio.com.
10.2 WEEE Declaration (Disposal) Electrical and electronic equipment must be disposed of separately from normal waste at the end of its operational lifetime.
Please dispose of this product according to the respective national regulations or contractual agreements. If there are any further questions concerning the disposal of this product, please contact d&b audiotechnik.
WEEE-Reg.-Nr. DE: 13421928
10.3 Licenses and Copyright A list of the components and a full-text version of all licenses and copyrights can be accessed using the amplifier’s Web Remote interface.
Þ Selecting the d&b logo at the top left of the «Web Remote» interface page allows access to the «Licenses and Copyright» information page.
This page provides an overview of the open source software used in this product. As required by the GPL and LGPL licenses, we will send you a copy of the used source code on request. If you would like to obtain a copy, please contact us by mail to: software.support@dbaudio.com

40

d&b 40D Reference manual 1.3 en

www.dbaudio.com

D2039.EN .01, 02/2024 © d&b audiotechnik GmbH & Co. KG

www.dbaudio.com

D2039.EN .01, 02/2024 © d&b audiotechnik GmbH & Co. KG

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