CHF 1'450.00

The E 5:4 has smart green credentials delivering low lifetime cost of ownership

Overview Image

Small in size, huge in benefits

Building on Lab.gruppen’s touring reputation for sonic excellence and rock-solid durability, 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 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

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.


Tech Spec Overview

  • High power density – 4 x 125 W in 1U
  • Certified Energy Star compliant
  • Flexible – IntelliDrive delivers similar power per channel at 70 V or Low-Z (4, 8 and 16 ohms)
  • Asymmetric loading – Allows “mixing and matching” of loads with different impedances to maximize both overall system efficiency and inventory utilization
  • IDEEA™ output stage based on patented Class D variant
  • Exceptionally low lifetime operating costs
  • High efficiency – Extremely low power consumption and heat output
  • Auto-standby function – Power consumption < 1 W in standby mode
  • RSL switch – Innovative circuit senses rail voltage and optimizes output for instantaneous load conditions
  • Efficient cooling – Dual temperature-controlled fan
  • Comprehensive circuit protection and fault indication

Tech Spec

ModelE 5:4
Number of amplifier channels4
Total output all channels driven500 W
Peak output voltage per channel100 V / 70 Vrms
Max. output current9.9 Arms
Max output power (all channels driven)
2 ohmsN.R.
4 ohms125 W
8 ohms125 W
16 ohms125 W (requires the “70 V” mode for the RSL, “Lo-Z” gives 63 W)
70 V125 W
100 VCan deliver 125 W to a 100 V load tapped at 250 W
THD 20 Hz - 20 kHz at 1 W<0.1%
THD at 1 kHz and 1 dB below clipping<0.05%
Signal to Noise Ratio>112 dBA
Channel separation (Crosstalk) at 1 kHz> 70 dB
Frequency Response2 Hz - 40 kHz
Input impedance20 kOhm
Common Mode Rejection (CMR)50 dB
Output impedance25 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 mode100 V
VPL for Lo-Z mode44.7 V
Sensitivity for stated power into 8 Ohm in Lo-Z mode4 dBu
Sensitivity for 70.7 V out in 70 V mode4 dBu
Sensitivity for stated power into 4 Ohm in Lo-Z mode1 dBu
Sensitivity for stated power into 16 Ohm in 70 V mode0 dBu
Gain in 70 V mode35.2 dB
Gain in Lo-Z mode28.2 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 filterFixed at 50 Hz, switchable per channel
Power controlCan 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
CoolingTwo fans, front-rear airflow, temperature controlled speed
Nominal voltage100 - 240 VAC
Operating voltage85 – 265 VAC
Standby consumption<1 W
Mains connectorIEC inlet
DimensionsW: 483 mm (19”), H: 44 mm (1 U), D: 381 mm (15”)
Weight6 kg (13.2 lbs)
FinishDark grey aluminum front and black steel chassis
ApprovalsCE, ANSI/UL 60065 (ETL), CSA, CCC, PSE, Energy Star
More Information
ACRpro SA Route de Veyrier 35 1227 Carouge shop[at]acrdirect.ch CHE-217.177.576 http://www.acrpro.ch/cg