dasaudio INTEGRAL-A Audio User Manual
- October 27, 2023
- dasaudio
Table of Contents
dasaudio INTEGRAL-A Audio
Overview
DAS Audio is a unique brand. We
create sound solutions for businesses,
always adapted to the different needs
of our clients.
The Integral Series is the heart and brain of our installation solutions. It
comprises of a series of devices that in addition to feeding and processing
the signal of our speakers, allow an absolute control to our users,
guaranteeing the protection and quality of the equipment.
You are about to discover what it means to work with our brand, and this is just the beginning. You will have access to quality training materials on our website, where you will discover specific business solutions and learn how to use them: dasaudio.com/en/training/
This user manual is designed to guide you, swiftly and smoothly, during the installation of our equipment, but in case you have any questions or doubts, do not hesitate to contact our technical support team by writing directly to [email protected] or, if you prefer, through our website, contacting your nearest office at dasaudio.com/contact
Description and features
Thank you for purchasing Integral-A Series amplifi-ers. They have been designed with the latest and most advanced Class D technology. As a result, a family of high-performance multichannel amplifiers with universal mains has been created for small to medium-sized applications.
- 2 or 4-channel models
- Switched Mode Power Supply 90- 240 Vac
- Class D amplification
- Selectable Low or High Impedance operation
- Built-in limiter
- Built-in high-pass lter at 80Hz (selectable)
- Independent volume controls per channel
- ON LED indicator for unit status
- Dual LED Signal/Clip indicators per channel
- Overtemperature and overcurrent protection
- DC protection
- Short circuit protection
- Stereo (low impedance) and Bridge (high imped-ance) modes
- Ultra-lightweight
- Terminal block input and outputs connectors
If there is unusual DC voltage at the output of the unit, the amplifier will be
blocked until power is cycled off & on.
When DC voltage is due to excessively high voltage at the amplifier´s input,
the unit will attempt to reactivate 3 times before shutting down.
- Current limiting: The amplifier has a built-in current limiter to protect it under overload conditions. The current limiter will allow a typical current of 30Apeak during audio peaks without disabling the amplifier. If an external clip limiter has not been implemented, or if an external clip limiter is not capable of limiting the output current properly (e.g., if a permanent short is loading the amplifier), the amplifier will be disabled to prevent any damage. The current limiting depends on the amplifier´s temperature. The higher the temperature, the lower the current limit for optimal amplifier protection.
- The amplifier monitors the internal rail voltages to prevent overloading of internal components and to ensure proper operation of the integrated amplifiers.
Front panel
A LED “ON” / “Standby” / “Protect”
The “ON” LED indicator lights up green when the am-plifier is on. When the
amplifier is in standby mode, the LED indicator illuminates red. An orange LED
indicates that the amplifier is in protection mode.
The protection mode can be triggered by: Overheating: Thermal protection
will be enabled when the internal power supply, transformer or one of the two
amplifier channels overheat due to inadequate cooling. When the amplifier has
cooled down, the channel’s ou-tput will be activated, and operation will
resume.
DC protection: DC protection protects the loudspeaker from damage in the
event the amplifier attempts to de-liver direct current (DC) to the
loudspeaker. This could happen either because the voltage on the input of the
amplifier is too high or if the unit has an internal fault.
Overvoltage: In case internal rail voltage is too high, the unit will
disable or mute the channels and temporarily will shut itself down to prevent
damage to internal com-ponents.
Undervoltage: In case internal rail voltage is too low, the unit will
disable or mute the channels to ensure correct amplifier operation. Once the
internal rail voltage rises to a normal level again, the amplifier channels
will be re-enabled.
B Output channel volume controls
The volume levels per channel can be adjusted using the front panel rotary switch encoders. Gain is at maxi-mum when the encoder is turned fully clockwise.
C “Signal / Clip” LED indicators
The LED indicators illuminate when signal is present at the amplifier inputs and they depend upon the posi-tion of the level control. If the input signal level exceeds the input sensitivity of the amplifier, Clip LED indica-tors will light up orange (soft clip) or red (severe clip).
Rear panel
A Speaker output
The units are equipped with 4-pin “Terminal Block” connectors (5.08mm-pitch). Stereo and Bridge or Line 100/70V configurations will be connected as follows:
B Entradas
The units are equipped with 5-pin “Terminal Block” (3.5mm-pitch) connectors.
C Mode Switch
It allows to configure the mode for the unit: stereo or bridge/line 100/70V.
Typically, amplifiers are used in stereo mode, where in-put A feeds channel A
and input B feeds channel B.
Utilize Bridge mode to combine power from the two channels into a single
output. Use Bridge mode to con-nect cabinets with 100 / 70V transformers
directly to the amplifier´s output. In Bridge mode, inputs B and D are
disabled, use inputs A and C.
D Power Switch
Turns the amplier on (position) and off (position ). When the amplier is powered, the LED ON will illumi-nate.
Installation
Rack Mounting
There are two 1U DIN models (A-402/404) and four 2U DIN models
(A-1002/1004/1602/1604). All units have standard 19-inch rack mounting width
and are equipped with four front panel mounting holes for use with M5 or M6
screws. Amplifier dimensions can be found in the “Line Drawings” section of
this manual.
Cooling system
The amplifiers are equipped with a fan located in a side panel to keep the unit
under stable conditions. The fans are managed by a microcontroller which
varies their speed according to the needs. Air inlets are located on one side
of the amplifier. Under no circumstances should they be blocked. The side walls
of the rack should be a minimum of 2 inches (5 cm) from the amplifier sides.
The back of the rack should be opened.
Input Cable Connections
DAS Audio recommends using professional balanced cables (two conductors,
shielded, 0.22 mm2 or 22-24 AWG) to connect the amplifier balanced input using
3.5 mm pitch “terminal block” connectors. Wiring should only be performed by
qualified personnel.
Speaker Cable Connections
To connect the loudspeakers, 4-pin terminal block (5.08 mm pitch)
connectors are used:
If two channels are bridged, they can be used for a 100/70V (high impedance) line.
Select 4 / 8 ohm impedance to work in stereo mode with 4 channels.
Select the transformer tap position (10/20/30W) to work in Bridge mode with two line channels 100/70V
DAS Audio recommends using professional, high quality, two-conductor cables
for speaker connection. For optimum results, speaker wires should be twisted
cable, if possible. To prevent the possibility of short circuits, the wires
should be stripped back no more than 6 mm (1/4”). The maximum cable run for
the line (100 / 70V) will be determined by the cable gauge (section) and the
rated power of the line.
For best performance, cable loss should not exceed 10% (approx. 1dB
The values below are a reference when selecting cable gauge/length (copper cables):
Cable loss in dB for 100V line
| L (m) | AWG | S (mm2) | 200W | 400W | 500W | 1000W |
|---|---|---|---|---|---|---|
| 10 | 16 | 13 | -0,05 | -0,1 | -0,12 | -0,24 |
| 10 | 14 | 2,1 | -0,03 | -0,06 | -0,075 | -0,15 |
| 10 | 12 | 3,3 | -0,018 | -0,037 | -0,047 | -0,1 |
| 25 | 16 | 1,3 | -0,12 | -0,24 | -0,3 | -0,6 |
| 25 | 14 | 2,1 | -0,075 | -0,14 | -0,18 | -0,36 |
| 25 | 12 | 3,3 | -0,05 | -0,1 | -0,12 | -0,23 |
| 50 | 16 | 1,3 | -0,24 | -0,47 | -0,6 | -1,12 |
| 50 | 14 | 2,1 | -0,18 | -0,3 | -0,36 | -0,7 |
| 50 | 12 | 3,3 | -0,1 | -0,18 | -0,23 | -0,46 |
| 75 | 16 | 1,3 | -0,35 | -0,7 | -0,85 | -1,7 |
| 75 | 14 | 2,1 | -0,22 | -0,43 | -0,54 | -1,05 |
| 75 | 12 | 3,3 | -0,14 | -0,28 | -0,34 | -0,68 |
Cable loss in dB for 70V line
| L(m) | AWG | S(mm2) | 200W | 400W | 500W | 1000W |
|---|---|---|---|---|---|---|
| 10 | 16 | 13 | -0,1 | -0,2 | -0,24 | -0,48 |
| 10 | 14 | 2,1 | -0,06 | -0,12 | -0,15 | -0,3 |
| 10 | 12 | 3,3 | -0,036 | -0,074 | -0,094 | -0,2 |
| 25 | 16 | 1,3 | -0,24 | -0,48 | -0,6 | -1,2 |
| 25 | 14 | 2,1 | -0,15 | -0,28 | -0,36 | -0,72 |
| 25 | 12 | 3,3 | -0,1 | -0,2 | -0,24 | -0,46 |
| 50 | 16 | 1,3 | -0,48 | -0,94 | -1,2 | -2,24 |
| 50 | 14 | 2,1 | -0,36 | -0,6 | -0,72 | -1,4 |
| 50 | 12 | 3,3 | -0,2 | -0,36 | -0,46 | -0,92 |
| 75 | 16 | 1,3 | -0,7 | -1,4 | -1,7 | -3,4 |
| 75 | 14 | 2,1 | -0,44 | -0,86 | -1,08 | -2,1 |
| 75 | 12 | 3,3 | -0,28 | -0,56 | -0,68 | -1,36 |
Mains Power Connection
Connect your amplifier to the mains power outlet using a suitable power cord
for your country. First, connect the IEC mains power cable connector to the
amplifier, and then connect the other end of the cord to the mains power
supply.
Warning: Do not attempt to disable the third prong (ground connection), as it is a safety feature of this connector, by using an adapter or other methods.
Power Consumption
Measured current consumption delivering 1/3 of rated output power to the
loads, including pink noise, corresponds to the worst-case scenario and it can
be
used when designing audio installations.
Depending on the mains power supply, these are the values:
-
A-402/404
1.5A a 230Vac, y 3A a 115Vac -
A-1002/1004
1.7A a 230Vac y 3.4A a 115Vac -
A-1602/1604
3A a 230Vac y 6A a 115Vac
Specifications
Dibujo de líneas
Troubleshooting
Annex: Balanced and Unbalanced Connections
There are two common ways of carrying the audio signal with microphone or line level:
Unbalanced line: Uses a two-conductor cable, carrying the signal as a potential difference between the two wires. Electromagnetic noise (interference) from the surroundings can be picked up and added to the signal carried by the cables, appearing at the output of our system as noise. Connectors that carry unbalanced signal have two pins, such as RCA (Phono), and 1/4” (6.35 mm often referred to as jack) mono. Three-pin connectors, such as XLR (Cannon), may also carry an unbalanced signal when one of the pins is not in use.
Balanced line: Uses a three-conductor cable. One of the conductors, known as the ground conductor, acts as a shield against electromagnetic noise. The other signal wires have the same potential difference with respect to ground, but one of the signals is reversed in polarity. Noise that cannot be rejected by the shield affects both signal wires equally. Most professional audio electronic devices use balanced inputs. In these devices the input circuit recognizes only the potential difference between the two signal-carrying wires with opposite polarity, thus rejecting noise, with the same polarity on both wires. Connectors that carry a balanced signal have three pins, such as XLR (Cannon), and 1/4” stereo jack.
References
- DAS Audio
- Training - DAS Audio
- Sistemas de sonido profesional | ¿Necesitas asesoramiento? - DAS Audio