LAB GRUPPEN E 5:4_US1 500W Amplifier with 4 Flexible Output-Channels for Installation Applications (E 5:4_US1)

Vendor: Lab Gruppen
LAB GRUPPEN E 5:4_US1 500W Amplifier with 4 Flexible Output-Channels for Installation Applications (E 5:4_US1) The E 10:4 has Smart Green Credentials delivering a low lifetime cost of ownership. Small in Size, Huge...

LAB GRUPPEN E 5:4_US1 500W Amplifier with 4 Flexible Output-Channels for Installation Applications (E 5:4_US1)

The E 10:4 has Smart Green Credentials delivering a low lifetime cost of ownership.

Small in Size, Huge in Benefits

Building on Lab Gruppen’s touring reputation for sonic excellence and rock-solid durability, the E Series brings a competitive edge to the installation market by adding ultra-compact size, high operating efficiency, output configuration flexibility, and an unprecedented cost-benefit ratio. At the heart of the E Series is Lab Gruppen’s IDEEA (IntelliDrive Energy Efficient Amplifier) technology. Based around a patented Class D variant output stage, IDEEA produces high power levels with very low distortion while drawing minimal mains current. Lab Gruppen’s proprietary Rail Sensing Limiter (RSL™), also exclusive to E Series, greatly reduces signal clipping to ensure high-quality audio output at all times. User configurable for Hi-Z (70 V) or Lo-Z, RSL senses rail voltages and optimizes each output for instantaneous load conditions. RSL settings also facilitate asymmetric loading of the channels to optimize performance and efficiency. Total available output power can be allocated among the channels as required by the application. This makes it possible, for example, to drive a small sub on one channel, a number of 70 V ceiling loudspeakers on the second channel, and a pair of full-range low-impedance loudspeakers on the two remaining channels.

Lab Gruppen Performance with Energy Star Compliance

By maintaining very low current draw during operating cycles even at high output levels, and reduced power consumption during non-operational cycles, our Energy Star-qualified products harness impeccable Lab Gruppen sonic performance and robust power output while meeting the rigorous efficiency requirements of current Energy Star certification standards. Lab Gruppen’s IDEEA architecture secures full Energy Star compliance by combining net operating efficiency of greater than 80% with an auto-power-down feature. After 20 minutes with no input signal, the amplifier automatically switches to standby mode – with consumption of less than 1 W – and switches back on when an input signal returns. GPIO facilities enable third-party systems to remotely control and monitor power state via contact closure.

Smart Green Credentials with Our IDEEA Platform

The established IntelliDrive Energy Efficient Amplifier (IDEEA) platform stands as the pinnacle of our amplifier design evolution, harnessing technologies from our flagship PLM Series to craft ingenious contractor solutions distinguished by their exceptional environmental sustainability.

Flexible Asymmetric Loading

Maximize performance and efficiency by customizing the allocation of total output power between channels or consolidating all power into a single channel for mono applications. This versatility enables you to effortlessly drive a small subwoofer on one channel while powering a series of 70 V distributed ceiling loudspeakers on the other, tailored to your specific needs.


  • 500 W amplifier carrying 4 flexible output channels in a high power density 1 rack unit form factor saves rack space and system cost

  • Energy efficient with Energy Star certification for supreme green credentials and exceptionally low lifetime running costs

  • Flexible IntelliDrive permits delivering the 4 x 125 W at constant voltage 70 V or low impedance (2, 4, 8 and 16 Ohms) on any channel

  • Asymmetric channel loading allows mixing and matching loads with different impedances to maximize overall system efficiency and inventory utilization

  • High efficiency amplifier with low power consumption and minimized heat generation lowers demands on the installations' mains distribution and cooling systems

  • IDEEA outputs stage based on proprietary, state-of-the-art Class-D amplifier technology for superior performance

  • Comprehensive fail safe circuit protection ensures continued operation even under reduced operating conditions

  • Auto-standby and auto-power-on reduces power consumption to below 1 W in non-operating cycles

  • Rail Sense Limiter (RSL) greatly reduces signal clipping and ensures simple configuration for constant voltage and low impedance loads

  • Built in 50 Hz high pass filter selectable per channel available on rear panel switch

  • Per channel attenuation knob and signal LED on rear panel for simple commissioning

  • Efficient cooling with temperature controlled fans with front to back airflow

  • Aluminum front panel with power and temperature LEDs and per channel signal and limit LEDs

  • GPIO connector with power control and indication for further system integration

  • Balanced high-quality analog inputs and amplifier outputs on detachable screw terminals

Number of amplifier channels


Total output all channels driven

500 W

Peak output voltage per channel

100 V / 70 Vrms

Max. output current

9.9 Arms

Max output power (all channels driven)
2 ohms


4 ohms

125 W

8 ohms

125 W

16 ohms

125 W (requires the “70 V” mode for the RSL, “Lo-Z” gives 63 W)

70 V

125 W

100 V

Can deliver 125 W to a 100 V load tapped at 250 W

THD 20 Hz - 20 kHz at 1 W


THD at 1 kHz and 1 dB below clipping


Signal to Noise Ratio

>112 dBA

Channel separation (Crosstalk) at 1 kHz

> 70 dB

Frequency Response

2 Hz - 40 kHz

Input impedance

20 kOhm

Common Mode Rejection (CMR)

50 dB

Output impedance

25 mOhm

Gain, Sensitivity and Limiters
Limit and gain switch defining limit and gain (per channel)

2 pos: Lo-Z and 70 V

VPL for 70 V mode

100 V

VPL for Lo-Z mode

44.7 V

Sensitivity for stated power into 8 Ohm in Lo-Z mode

4 dBu

Sensitivity for 70.7 V out in 70 V mode

4 dBu

Sensitivity for stated power into 4 Ohm in Lo-Z mode

1 dBu

Sensitivity for stated power into 16 Ohm in 70 V mode

0 dBu

Gain in 70 V mode

35.2 dB

Gain in Lo-Z mode

28.2 dB

Level adjustment (per channel)

Rear panel potentiometer, from -inf to 0 dB

Connectors and Switches
Input connectors (per ch.)

3 - pin detachable screw terminals, electronically balanced

Output connectors (per ch.)

2 - pin detachable screw terminals

High pass filter

Fixed at 50 Hz, switchable per channel

Power control

Can be used to go between standby and ON

GPI (power control input)

Contact closure type, 2-pin detachable screw terminal, controls the power state

GPO (power state output)

Contact closure type, 2-pin detachable screw terminal, for external monitoring of the power state


Two fans, front-rear airflow, temperature controlled speed

Nominal voltage

100 - 240 VAC

Operating voltage

85 – 265 VAC

Standby consumption

<1 W

Mains connector

IEC inlet


W: 483 mm (19”), H: 44 mm (1 U), D: 381 mm (15”)


6 kg (13.2 lbs)


Dark grey aluminum front and black steel chassis