Rated 4.9 (84 reviews)
The Lab Gruppen E 20:4 packs four 500 W channels, 2,000 W in total, into a single rack unit for fixed installation work. Its IDEEA Class-D output stage and Rail Sense Limiter let each channel drive Lo-Z loads from 2 to 16 Ω or Hi-Z 70 V / 100 V constant-voltage lines, and channels can be loaded asymmetrically, so one chassis can run a sub, a 100 V ceiling-speaker line and full-range pairs at the same time. Low mains draw, minimal heat and auto-standby keep lifetime running costs down in dense amplifier racks.
4 × 500 W
Any load, any channel
2,000 W
Total output
2 Ω-100 V
Lo-Z and Hi-Z
1U
19″ rack, 7.9 kg
70 V / 100 V line systemsHi-Z (constant-voltage) mode is the standard way to feed long runs of tapped ceiling and wall loudspeakers in installed sound: many speakers share one cable pair, and each takes only its tapped wattage. The E 20:4 delivers its full 500 W per channel into 70 V or 100 V lines as well as low-impedance loads, so Lo-Z and distributed zones can be mixed freely across the four channels.
Features
2,000 W across 4 flexible output channels in a 1U form factor
IntelliDrive delivers 4 × 500 W into any load: 2, 4, 8 or 16 Ω, or Hi-Z 70 V / 100 V
Asymmetric channel loading mixes different impedances on one amplifier
Proprietary IDEEA Class-D output stage
Rail Sense Limiter (RSL) greatly reduces signal clipping and simplifies configuration
Low power consumption and heat generation ease demands on mains and cooling
Auto-standby and auto-power-on cut consumption in non-operating cycles
Built-in 50 Hz high-pass filter, switchable per channel on the rear panel
Per-channel attenuation knob and signal LED on the rear panel for commissioning
Temperature-controlled fan with front-to-back airflow
Aluminium front panel with power, temperature and per-channel signal/limit LEDs
GPIO connector with power control and indication for system integration
Balanced analogue inputs and amplifier outputs on detachable screw terminals
Comprehensive fail-safe circuit protection
Specifications
| Amplifier channels | 4 |
| Total output, all channels driven | 2,000 W (4 × 500 W) |
| Max output voltage per channel | 141 Vp / 100 Vrms |
| Max output current per channel | 16.3 Arms |
| THD (20 Hz – 20 kHz @ 1 W into 8 Ω) | <0.1% |
| THD (@ 1 kHz, 1 dB below clipping) | <0.05% |
| Signal-to-noise ratio | >106 dBA |
| Channel separation @ 1 kHz | >70 dB |
| Frequency response | 2 Hz – 40 kHz |
| Input impedance | 20 kΩ |
| Common mode rejection | 50 dB |
| Output impedance | 25 mΩ |
| Mains | 100-240 VAC, standard IEC receptacle |
| Power consumption | 600 W |
| Standby consumption | <2.5 W |
| Dimensions (H × W × D) | 44 × 483 × 417 mm (1U, 19″) |
| Weight | 7.9 kg |
| Finish | Dark grey aluminium front, black steel chassis |
| Warranty | 1 year |
