Description
Lab Gruppen E series amplifiers have been manufactured and designed for installations in retail, education, restaurants and offices, where high quality and high energy-efficiency is required. These Class-D amplifiers each have a temperature-controlled fan that turns off when only low-level signals are detected, helping the amplifier comply with Energy Star efficiency certifications.
The rear panel houses all input and output connectivity and setting controls, with three-pole detachable screw terminal block connectors for inputs and outputs The output connectors can accommodate cable of up to 4 mm square cross section. Attenuators with a range of infinity to 0dB can be manually adjusted to affect the channel gain, and a high-pass filter can be switched on/off to insert a 50Hz filter before the output stage. A power button can be momentarily depressed to change the power state from standby to on with a multi-coloured LED indicator showing amber for automatic standby status, red for forced standby status, and green for power on. A single IEC power inlet provides 100-240VAC power to the amplifier.
The 1U high front panel is used for power amplifier and channel status indication. A bi-colour LED illuminates green when power is on and amber when the amplifier is currently in standby mode. A 'TEMP' LED flashes amber to indicate excessive temperature in the power supply section or output stages. When the temperature exceeds the 'danger' threshold, the LED turns to constant amber illumination and the amplifier self-mutes. Green LEDs, one per channel, indicate an input signal in excess of the signal present threshold and a second LED per channel illuminates when the amplifiers limiting stage is engaged.
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) |
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