Overview
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.

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.
Features

High power density – 2 × 200 W in 1U
Certified Energy Star compliant
Flexible – IntelliDrive delivers similar power per channel at 70 V and Lo-Z (2, 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
High efficiency – Extremely low power consumption and heat output
Auto-standby function – with power consumption <1 W in standby state
Exceptionally low lifetime operating costs
RSL switch- Innovative circuit senses rail voltage and optimizes output for instantaneous load conditions
Efficient cooling – One temperature-controlled fan
Comprehensive circuit protection and fault indication

Specifications

Model
E 4:2

General

Number of amplifier channels
2

Max total output all channels driven
400 W

Peak output voltage per channel
100 V / 70 Vrms

Max. output current
11 Arms

Max output power (all channels driven)

2 ohms
200 W

4 ohms
200 W

8 ohms
200 W (requires the “70 V” mode for the RSL. “Lo-Z” gives 100 W)

16 ohms
200 W (requires the “70 V” mode for the RSL, “Lo-Z” gives 50 W)

70 V
200 W

100 V
Can deliver 200 W to a 100 V load tapped at 400 W

Performance

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 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
40 V

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

Sensitivity for 70.7 V out in 70 V mode
4 dBu

Sensitivity for stated power into 2 Ohm in Lo-Z mode
1 dBu

Sensitivity for stated power into 8 Ohm in 70 V mode
-0.9 dBu

Sensitivity for stated power into 16 Ohm in 70 V mode
2.1 dBu

Gain in 70 V mode
35.2 dB

Gain in Lo-Z mode
27.2 dB

Level adjustment (per channel)
Rear panel potentiometer, from -inf to 0 dB

Connectors and Buttons

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

Cooling
Single fan, front to rear airflow, no filter required, temperature controlled speed

Power

Nominal voltage
100 – 240 VAC

Operating voltage
70 – 265 VAC

Standby consumption
<1 W

Mains connector
IEC inlet

Dimensions

Dimensions
W: 483 mm (19”), H: 44 mm (1 U), D: 276 mm (10.9”)

Weight

Weight
4.2 kg (9.3 lbs)

Finish

Finish
Dark grey aluminum front and black steel chassis

Approvals

Approvals
CE, RoHS,WEEE, UL (UL 60065), CSA C22.2 NO. 60065, FCC Part 15 Subpart B Class A, PSE, CCC Energy Star