Power amplifier Lab.Gruppen E4:2

Lab.Gruppen E4:2

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.

Specs

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

Weight: 4.2 kg (9.3 lbs)