The Lab Gruppen E5:4 500W E-Series Installation Amplifier is a feature-rich solution for professional audio installations. This amplifier is designed to deliver exceptional performance, flexibility, and energy efficiency, making it a top choice for mixed A/V installations. HIGHLIGHTS Power Output: 4 x 125W channels, configurable for constant voltage (70/100V) or low impedance (2, 4, 8, and 16 Ohms) Energy Efficiency: Energy Star certified, with low power consumption and minimal heat generation Asymmetric Channel Loading: Allows mixing and matching loads with different impedances for optimized system efficiency Amplifier Technology: IntelliDrive Energy Efficient Amplifier (IDEEA) technology, a proprietary Class-D design for high performance and low distortion Rail Sensing Limiter (RSL): Reduces signal clipping and optimizes output for varying load conditions Auto-Standby and Power-On: Automatically reduces power consumption to below 1W during idle periods Cooling System: Temperature-controlled fans with front-to-back airflow for efficient cooling User-Friendly Controls: Per-channel attenuation knobs, signal LEDs, and a high-pass filter (50 Hz) selectable via rear panel switches Durable Build: Compact 1 rack unit form factor with an aluminum front panel, designed for durability and ease of installation Connectivity: Balanced analog inputs and outputs on detachable screw terminals, along with a GPIO connector for system integration Fail-Safe Protection: Comprehensive circuit protection ensures reliable operation under challenging conditions SPECIFICATION General Number of amplifier channels 4 Total output all channels driven 500 W Peak output voltage per channel 100 V / 70 Vrms Max. output current 9.9 Arms Max output power (all channels driven) 2 ohms N.R. 4 ohms 125 W 8 ohms 125 W 16 ohms 125 W (requires the ?70 V? mode for the RSL, ?Lo-Z? gives 63 W) 70 V 125 W 100 V Can deliver 125 W to a 100 V load tapped at 250 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 44.7 V Sensitivity for stated power into 8 Ohm in Lo-Z mode 4 dBu Sensitivity for 70.7 V out in 70 V mode 4 dBu Sensitivity for stated power into 4 Ohm in Lo-Z mode 1 dBu Sensitivity for stated power into 16 Ohm in 70 V mode 0 dBu Gain in 70 V mode 35.2 dB Gain in Lo-Z mode 28.2 dB Level adjustment (per channel) Rear panel potentiometer, from -inf to 0 dB Connectors and Switches 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 Two fans, front-rear airflow, temperature controlled speed Power Nominal voltage 100 - 240 VAC Operating voltage 85 ? 265 VAC Standby consumption 1 W Mains connector IEC inlet Dimensions Dimensions W: 483 mm (19?), H: 44 mm (1 U), D: 381 mm (15?) Weight Weight 6 kg (13.2 lbs) Finish Finish Dark grey aluminum front and black steel chassis DOCUMENTATION A E Specifications A E Specifications, German Current Draw Thermal Dissipation Current Draw Thermal Dissipation English Data Sheet Quick Start Guide, All Language