The E 4:2 has smart green credentials delivering low lifetime cost of ownership. 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.
Features
- 400 W amplifier carrying 2 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 2 x 200 W at constant voltage 70 V or low impedance (2, 4 and 8 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 fan 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
Specifications
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 |
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