LAB GRUPPEN E 20:2 4000 Watt Amplifier User Guide
- June 5, 2024
- Lab gruppen
Table of Contents
LAB GRUPPEN E 20:2 4000 Watt Amplifier User Guide
Important Safety Instructions
Caution: Risk of Electric shock do not open
****Terminals marked with this symbol carry electrical current of sufficient magnitude to constitute risk of electric shock. Use only high-quality professional speaker cables with ¼” TS or twist-locking plugs pre-installed. All other installation or modification should be performed only by qualified personnel.
**** This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure – voltage that may be sufficient to constitute a risk of shock.
**** This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature. Please read the manual.
Caution
To reduce the risk of electric shock, do not remove the top cover (or the rear
section). No user serviceable parts inside. Refer servicing to qualified
personnel.
Caution
To reduce the risk of fire or electric shock, do not expose this appliance to
rain and moisture. The apparatus shall not be exposed to dripping or splashing
liquids and no objects filled with liquids, such as vases, shall be placed on
the apparatus.
Caution
These service instructions are for use by qualified service personnel only. To
reduce the risk of electric shock do not perform any servicing other than that
contained in the operation instructions. Repairs have to be performed by
qualified service personnel.
- Read these instructions.
- Keep these instructions.
- Heed all warnings.
- Follow all instructions.
- Do not use this apparatus near water.
- Clean only with dry cloth.
- Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
- Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
- Use only attachments/accessories specified by the manufacturer.
Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip over.- Unplug this apparatus during lightning storms or when unused for long periods of time.
- 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 or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
- The apparatus shall be connected to a MAINS socket outlet with a protective earthing connection.
- Where the MAINS plug or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.
- Correct disposal of this product: This symbol indicates that this product must not be disposed of with household waste, according to the WEEE Directive (2012/19/EU) and your national law. This product should be taken to a collection center licensed for the recycling of waste electrical and electronic equipment (EEE). The mishandling of this type of waste could have a possible negative impact on the environment and human health due to potentially hazardous substances that are generally associated with EEE. At the same time, your cooperation in the correct disposal of this product will contribute to the efficient use of natural resources. For more information about where you can take your waste equipment for recycling, please contact your local city office, or your household waste collection service.
- Do not install in a confined space, such as a book case or similar unit.
- Do not place naked flame sources, such as lighted candles, on the apparatus.
- Please keep the environmental aspects of battery disposal in mind. Batteries must be disposed-of at a battery collection point.
- This apparatus may be used in tropical and moderate climates up to 45°C.
Introduction
The information contained in this Quick Start Guide is sufficient for proper installation of E Series amplifiers, and for configuration of settings in typical applications.
Please refer to the full Operation Manual for detailed information on maintenance, cooling requirements, warranty, and configuration for complex installations.
Unpacking and visual checks
Every Lab Gruppen amplifier is carefully tested and inspected before leaving the factory and should arrive in perfect condition. If any damage is discovered, please notify the shipping carrier immediately. Save the packing materials for the carrier’s inspection and for any future shipping.
Installation
Free air flow from front to rear is required for cooling. No doors or covers should be mounted either in front of or behind the amplifiers. Amplifiers may be stacked directly on top of each other with no spacing, though some spacing may enable more convenient installation of rear cabling. See the specifiication page for size and weights.
WARNING: Please refer to the information on the label located on the product top cover for electrical and safety information before installing or operating the device.
Cooling
E Series devices use a forced–air cooling system with airflow from front to rear, allowing high continuous power levels without thermal problems. Ensure that there is sufficient space in front of and behind the amplifiers to allow for fee air flow. Please refer to the full Operation Manual for thermal dissipation value when installing large numbers of amplifiers in air conditioned spaces.
NOTE: Fit solid blanks (not ventilation blanks) to unused rack spaces to ensure effective air ciculation. Leaving gaps in between items of equipment degrades the effectiveness of forced-air cooling.
Operating voltage
All E Series amplifiers have a universal power supply that operates on mains from 100 – 240 V at 50 or 60 Hz. The IEC receptacle on the rear panel accepts the supplied IEC cord which terminates in a connector appropriate for the country of sale. When AC power is connected, the amplifier goes into standby (amber indication on power LEDs). It will go on if the power button is pressed (or if signal is supplied to either input or if the GPI is closed). The power LED shows green for “on” indication.
Grounding
For safety reasons, never disconnect the earth (ground) pin on the AC power cord. Use balanced input connections to avoid hum and interference.
Signal ground is floating via a resistor to chassis, and therefore grounding is automatic.
Audio inputs
Audio inputs are electronically balanced and use three-pole Phoenix type connectors. Follow the +, – and Ground labels when making connections.
Loudspeaker outputs
Loudspeaker outputs use detachable block-type connectors. Maximum connector current rating is 41 Arms (exceeding capacity of the amplifier). Cables up to 4 mm2 (12 AWG) can be accommodated. Observe polarity to avoid low frequency cancellation loss.
Note: A channel’s amplifier module is based on an inherently bridged topology. DO NOT CONNECT ANY TERMINAL TO GROUND.
Front panel
The front panel presents the following amplifier status indicators:
POWER – Bi-color LED indicates standby (amber) and on (green).
TEMP (temperature) – Flashing yellow indicates excessive temperature in
the power supply unit (PSU) or output stage(s). When temperature exceeds the
danger threshold, the LED shows steady yellow and the amplifier mutes.
SIG (input signal present) – Green indication when input signal exceeds
signal present threshold.
LIM (limit) – Illuminates when the amplifier limits the signal. Limiting
is engaged when the channel:
- Reaches the selected voltage limit threshold (as determined by model and position on the limit switch)
- Rail voltage sags below the selected threshold
- Maximum current output reached
- Mains voltage cannot maintain rail voltage
Rear panel
-
Important note on Auto Power On/Off – All E Series amplifiers include an Auto Power Down/On (APD) scheme. As shipped (factory default), the amplifier will go to low power standby mode when no signal is present for 20 minutes. It will return to power on mode when signal exceeds the signal present threshold. For information on calibrating the signal present threshold, please refer to the Operation Manual.
-
Power button and indication – When pressed momentarily, toggles power state between standby and on. Indicator shows amber for when it goes into standby, amber if it is forced into standby by pressing the power knob, and green for on.
-
Attenuators – Range is 0 dB to -infinity; vertical is -10 dB. Amplifier sensitivity is 4 dBu with attenuator at 0 dB and 14 dBu at -10 dB.
-
SIG – Illuminates green when input signal above Signal Present Threshold (SPT). For adjustment of SPT value, please refer to the full Operation Manual.
-
High-pass / Full-range – Selects flat or high-pass filter at 50 Hz.
-
Limit switch – See specification page for switch settings.
The E Series can also be used asymmetrically; i.e. one channel delivers more than the other(s). Please download the operational manual for examples at www.labgruppen.com/support/download -
GPIO – GPIO allows use of external relays for power on and off. See the Operation Manual for information on GPIO facilities.
-
70V / Lo-Z (E 5:4 and E 10:4) – The 70V position should be selected for constant voltage systems. 100V loudspeakers can be driven, but the power will be half of the selected tap. The 70V position is also used for full rated power into 16 ohm loads. The Lo-Z position should be selected for full power into 2 or 4 ohm loads, or for limiting maximum output into 16 ohms. For 8 ohm, see the following table.
| 4 Ω| 8 Ω (Lo-Z/Hi-Z)| 16 Ω (Lo-Z/Hi-Z)| 70
V| 100 V
---|---|---|---|---|---
E 10:4| 1 dBu: 250 W| 4 dBu: 250 W| “4dBu: 125 W/ 3 dBu: 250 W”| 4 dBu:
250 W| 4 dBu: 250 W
E 5:4| 1 dBu: 125 W| 4 dBu: 125 W| “4dBu: 63 W / 0 dBu: 125 W”| 4
dBu: 125 W| 4 dBu: 125 W
*If the “70V” mode is used
Specifications
| **** | E20:2 | E40:2 | E20:4 | E 40:4 | E 10:4 | E 5:4 |
|---|
General
Number of powered channels| 2| 2| 4| 4| 4| 4
Total output all channels driven| 2000 W| 4000 W| 2000 W| 4000 W| 1000 W| 500
W
Max output voltage per channel| 141 Vp / 100 Vrms| 160 Vp / 113 Vrms| 141 Vp /
100 Vrms| 141 Vp / 100 Vrms| 100 Vp / 70 Vrms| 100 Vp / 70 Vrms
Max output current per channel| 22.6 Arms| 35.4 Arms| 16.3 Arms| 21.2 Arms| 14
Arms| 10 Arms
Asymmetric load operation| Units are capable of delivering extra power to one
channel while sending significantly less to the other
E 5:4| E 5:4| E 5:4| E 5:4
---|---|---|---
E 5:4| E 5:4| E 5:4| E 5:4
E 5:4| E 5:4| E 5:4| E 5:4| 3 dBu: 1000 W @ 70 V mode| 1 dBu: 250 W @ Lo-Z
mode| 1 dBu: 125 W @ Lo-Z mode
E 5:4| E 5:4| E 5:4| E 5:4| 3 dBu: 1000 W @ 100 V mode| 4 dBu: 250 W @ Lo-Z
mode| 4 dBu: 125 W @ Lo-Z mode
E 5:4| E 5:4| E 5:4| E 5:4| 4 dBu: 625 W @ 100 V mode| 4 dBu: 125 W @ Lo-Z
mode 3 dBu: 250 W @ 70 V mode| 4 dBu: 63 W @ Lo-Z mode 0 dBu: 125 W @ 70 V
mode
E 5:4| E 5:4| E 5:4| E 5:4| 4 dBu: 1000 W @ 70 V mode| 4 dBu: 250 W @ 70 V
mode| 4 dBu: 125 W @ 70 V mode
E 5:4| E 5:4| E 5:4| E 5:4| 4 dBu: 1000 W @ 100 V mode 4 dBu: 900 W @ 42 V
mode| 4 dBu: 250 W @ 70 V mode into 100 V load tapped @ 500 W N/R| 4 dBu: 125
W @ 70 V mode into 100 V load tapped @ 250 W N/R
E 5:4
E 5:4| E 5:4| E 5:4| E 5:4
E 5:4| E 5:4| E 5:4| E 5:4| 4 dBu: 1750 W @ 70 V mode| 4 dBu: 500 W @ Lo-Z
mode 2 dBu: 750 W @ 70 V mode| 4 dBu: 250 W @ Lo-Z mode -1 dBu: 400 W @ 70 V
mode
E 5:4| E 5:4| E 5:4| E 5:4| 4 dBu: 1250 W @ 100 V mode| 4 dBu: 250 W @ Lo-Z
mode 4 dBu: 625 W @ 70 V mode| 4 dBu: 125 W @ Lo-Z mode 3 dBu: 500 W @ 70 V
mode
E 5:4| E 5:4| E 5:4| E 5:4| 4 dBu: 625 W @ 100 V mode| 4 dBu: 125 W @ Lo-Z
mode 4 dBu: 310 W @ 70 V mode| 4 dBu: 63 W @ Lo-Z mode 4 dBu: 310 W @ 70 V
mode
E 5:4| E 5:4| E 5:4| E 5:4| 4 dBu: 1450 W @ 70 V mode| 4 dBu: 750 W @ 70 V
mode| 4 dBu: 500 W @ 70 V mode
E 5:4| E 5:4| E 5:4| E 5:4| 4 dBu: 2000 W @ 100 V mode<0.1%| 4 dBu: 750 W @ 70
V mode into 100 V load tapped @ 1500 W <0.1%| 4 dBu: 500 W @ 70 V mode into
100 V load tapped @ 1000 W <0.1%
E 5:4
E 5:4| E 5:4| E 5:4| E 5:4
E 5:4| E 5:4| E 5:4| E 5:4| <0.05%| <0.05%| <0.05%
E 5:4| E 5:4| E 5:4| E 5:4| >106 dBA| >106 dBA| >106 dBA
E 5:4| E 5:4| E 5:4| E 5:4| >70 dB| >70 dB| >70 dB
E 5:4| E 5:4| E 5:4| E 5:4| 2 Hz – 40 kHz| 2 Hz – 40 kHz| 2 Hz – 40 kHz
E 5:4| E 5:4| E 5:4| E 5:4| 20 kΩ| 20 kΩ| 20 kΩ
E 5:4| E 5:4| E 5:4| E 5:4| 50 dB| 50 dB| 50 dB
E 5:4| E 5:4| E 5:4| E 5:4| 25 mΩ| 25 mΩ| 25 mΩ
| E 20:2| E 40:2| E 20:4| E 40:4| E 10:4| E 5:4
---|---|---|---|---|---|---
Limiters and Gain
LIMIT switch (per channel)| 3 positions: A, B and C| 3 positions: A, B and C|
3 positions: A, B and C| 3 positions: A, B and C| 2 positions: 70 V and Lo-Z|
2 positions: 70 V and Lo-Z
Max output voltage, LIMIT switch pos A (70 V)| 141 Vp / 100 Vrms| 160 Vp /
113 Vrms| 141 Vp / 100 Vrms| 141 Vp / 100 Vrms| 100 Vp / 70 Vrms| 100 Vp / 70
Vrms
Max output voltage, LIMIT switch pos B| 100 Vp / 70 Vrms| 141 Vp / 100 Vrms|
100 Vp / 70 Vrms| 100 Vp / 70 Vrms| N/A| N/A
Max output voltage, LIMIT switch pos C (Lo-Z)| 63 Vp / 45 Vrms| 100 Vp / 70
Vrms| 63 Vp / 45 Vrms| 59 Vp / 42 Vrms| 63 Vp / 45 Vrms| 45 Vp / 32 Vrms
Gain in LIMIT switch pos A (70 V)| 38.2 dB| 39.3 dB| 38.2 dB| 38.2 dB| 35.2
dB| 35.2 dB
Gain in LIMIT switch pos B| 35.2 dB| 38.2 dB| 35.2 dB| 35.2 dB| N/A| N/A
Gain in LIMIT switch pos C (Lo-Z)| 31.2 dB| 35.2 dB| 31.2 dB| 30.7 dB| 31.2
dB| 28.2 dB
Level adjustment (per channel)| Rear panel potentiometer, detented from -∞ to
0 dB
Sensitivity and Maximum Output Power (all ch. driven)| 4 dBu: 900 W @ 42
V mode| N/R| N/R
---|---|---|---
2 Ω load| 4 dBu: 1000 W @ 45 V mode| 3 dBu: 2000 W @ 70 V mode| 1 dBu: 500 W @
45 V mode
4 Ω load| 3 dBu: 1000 W @ 70 V mode| 3 dBu: 2000 W @ 100 V mode| 4 dBu: 500 W
@ 45 V mode| 3 dBu: 1000 W @ 70 V mode| 1 dBu: 250 W @ Lo-Z mode| 1 dBu: 125 W
@ Lo-Z mode
8 Ω load| 3 dBu: 1000 W @ 100 V mode| 4 dBu: 1600 W @ 113 V mode| 3 dBu: 500 W
@ 70 V mode| 3 dBu: 1000 W @ 100 V mode| 4 dBu: 250 W @ Lo-Z mode| 4 dBu: 125
W @ Lo-Z mode
16 Ω load| 4 dBu: 625 W @ 100 V mode| 4 dBu: 800 W @ 113 V mode| 3 dBu: 500 W
@ 100 V mode| 4 dBu: 625 W @ 100 V mode| 4 dBu: 125 W @ Lo-Z mode 3 dBu: 250 W
@ 70 V mode| 4 dBu: 63 W @ Lo-Z mode 0 dBu: 125 W @ 70 V mode
70 V load| 4 dBu: 1000 W @ 70 V mode| 4 dBu: 2000 W @ 70 V mode| 4 dBu: 500 W
@ 70V mode| 4 dBu: 1000 W @ 70 V mode| 4 dBu: 250 W @ 70 V mode| 4 dBu: 125 W
@ 70 V mode
100 V load| 4 dBu: 1000 W @ 100 V mode| 4 dBu: 2000 W @ 100 V mode| 4 dBu: 500
W @ 100 V mode| 4 dBu: 1000 W @ 100 V mode 4 dBu: 900 W @ 42 V mode| 4 dBu:
250 W @ 70 V mode into 100 V load tapped @ 500 W N/R| 4 dBu: 125 W @ 70 V mode
into 100 V load tapped @ 250 W N/R
Sensitivity and Maximum Output Power (single ch. max)
2 Ω load| 4 dBu: 1000 W @ 45 V mode| 4 dBu: 2500 W @ 70 V mode| 1 dBu: 500 W @
45 V mode
4 Ω load| 3 dBu: 2000 W @ 100 V mode| 4 dBu: 3200 W @ 113 V mode| 3 dBu: 1000
W @ 70 V mode| 4 dBu: 1750 W @ 70 V mode| 4 dBu: 500 W @ Lo-Z mode 2 dBu: 750
W @ 70 V mode| 4 dBu: 250 W @ Lo-Z mode -1 dBu: 400 W @ 70 V mode
8 Ω load| 4 dBu: 1250 W @ 100 V mode| 4 dBu: 1600 W @ 113 V mode| 4 dBu: 1250
W @ 100 V mode| 4 dBu: 1250 W @ 100 V mode| 4 dBu: 250 W @ Lo-Z mode 4 dBu:
625 W @ 70 V mode| 4 dBu: 125 W @ Lo-Z mode 3 dBu: 500 W @ 70 V mode
16 Ω load| 4 dBu: 625 W @ 100 V mode| 4 dBu: 800 W @ 113 V mode| 4 dBu: 625 W
@ 100 V mode| 4 dBu: 625 W @ 100 V mode| 4 dBu: 125 W @ Lo-Z mode 4 dBu: 310 W
@ 70 V mode| 4 dBu: 63 W @ Lo-Z mode 4 dBu: 310 W @ 70 V mode
70 V load| 4 dBu: 1550 W @ 70 V mode| 4 dBu: 2450 W @ 70 V mode| 4 dBu: 1100 W
@ 70 V mode| 4 dBu: 1450 W @ 70 V mode| 4 dBu: 750 W @ 70 V mode| 4 dBu: 500 W
@ 70 V mode
100 V load| 4 dBu: 2000 W @ 100 V mode| 4 dBu: 3500 W @ 100 V mode| 4 dBu:
1600 W @ 100 V mode| 4 dBu: 2000 W @ 100 V mode <0.1%| 4 dBu: 750 W @ 70 V
mode into 100 V load tapped @ 1500 W <0.1%| 4 dBu: 500 W @ 70 V mode into 100
V load tapped @ 1000 W <0.1%
Performance
THD (20 Hz – 20 kHz @ 1 W into 8 Ω)| <0.1%| <0.1%| <0.1%
THD @ 1 kHz, 1 dB below clipping| <0.05%| <0.05%| <0.05%| <0.05%| <0.05%|
<0.05%
Signal-to-noise ratio| >106 dBA| >106 dBA| >106 dBA| >106 dBA| >106 dBA| >106
dBA
Channel separation (crosstalk) @ 1 kHz| >70 dB| >70 dB| >70 dB| >70 dB| >70
dB| >70 dB
Frequency response| 2 Hz – 40 kHz| 2 Hz – 40 kHz| 2 Hz – 40 kHz| 2 Hz – 40
kHz| 2 Hz – 40 kHz| 2 Hz – 40 kHz
Input impedance| 20 kΩ| 20 kΩ| 20 kΩ| 20 kΩ| 20 kΩ| 20 kΩ
Input common mode rejection, CMR| 50 dB| 50 dB| 50 dB| 50 dB| 50 dB| 50 dB
Output impedance| 25 mΩ| 25 mΩ| 25 mΩ| 25 mΩ| 25 mΩ| 25 mΩ
Dark grey aluminium front and black steel chassis
- Limiter switch positions for E 10:4 and E 5:4 All specifications are subject to change without notice
LEGAL DISCLAIMER
Music Tribe accepts no liability for any loss which may be suffered by any person who relies either wholly or in part upon any description, photograph, or statement contained herein. Technical specifications, appearances and other information are subject to change without notice. All trademarks are the property of their respective owners. Midas, Klark Teknik, Lab Gruppen, Lake, Tannoy, Turbosound, TC Electronic, TC Helicon, Behringer, Bugera, Aston Microphones and Coolaudio are trademarks or registered trademarks of Music Tribe Global Brands Ltd. © Music Tribe Global Brands Ltd. 2021 All rights reserved.
LIMITED WARRANTY
For the applicable warranty terms and conditions and additional information regarding Music Tribe’s Limited Warranty, please see complete details online at community.musictribe.com/pages/support#warranty.
Important information
- Register online. Please register your new MusicTribe equipment right after you purchase it by visiting musictribe.com. Registering your purchase using our simple online form helps us to process your repair claims more quickly and efficiently. Also, read the terms and conditions of our warranty, if applicable.
- Malfunction. Should your MusicTribe Authorized Reseller not be located in your vicinity, you may contact the MusicTribe Authorized Fulfiller for your country listed under “Support” at musictribe.com. Should your country not be listed, please check if your problem can be dealt with by our “Online Support” which may also be found under “Support” at musictribe.com. Alternatively, please submit an online warranty claim at musictribe.com BEFORE returning the product.
- Power Connections. Before plugging the unit into a power socket, please make sure you are using the correct mains voltage for your particular model. Faulty fuses must be replaced with fuses of the same type and rating without exception.
FEDERAL COMMUNICATIONS COMMISSION COMPLIANCE INFORMATION
Responsible Party Name: Music Tribe Commercial NV Inc.
Address: 122 E. 42nd St.1, 8th Floor NY, NY 10168, United States
Email Address: legal@musictribe.com
E Series
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:
- this device may not cause harmful interference, and
- this device must accept any interference received, including interference that may cause undesired operation.
Important information:
Changes or modifications to the equipment not expressly approved by Music Tribe can void the user’s authority to use the equipment.
Hereby, Music Tribe declares that this product is in compliance with Directive 2014/35/EU,Directive 2014/30/EU, Directive 2011/65/EU and Amendment 2015/863/EU, Directive 2012/19/EU, Regulation 519/2012 REACH SVHC and Directive 1907/2006/EC.
Full text of EU DoC is available at https://community.musictribe.com/
EU Representative: Music Tribe Brands DK A/S
Address: Gammel Strand 44, DK-1202 København K, Denmark
UK Representative: Music Tribe Brands UK Ltd.
Address: 6 Lloyds Avenue, Unit 4CL London EC3N 3AX, United Kingdom
