Compact Design and Energy Efficiency: The Lab Gruppen E4:2 amplifier delivers 400 watts across two channels within a compact 1U rack space. This design not only conserves rack space but also reduces system costs, making it ideal for installations where space is at a premium. Its Energy Star certification highlights its exceptional energy efficiency and low lifetime running costs, contributing to significant savings over the long term.

IntelliDrive Technology: Equipped with IntelliDrive technology, the E4:2 provides up to 200 watts per channel, adaptable to both constant voltage (70 V) and low impedance loads (2, 4, and 8 Ohms). This flexibility ensures compatibility with various audio setups, whether driving low-impedance speakers or high-voltage distributed systems.

Advanced Class-D Technology: The amplifier incorporates advanced Class-D technology, which minimizes power consumption and heat generation. This efficient design alleviates the load on mains distribution and cooling systems, ensuring reliable operation even in demanding environments.

Asymmetric Channel Loading: The E4:2 features asymmetric channel loading, allowing users to mix and match loads with different impedances. This capability enhances overall system efficiency by optimizing power distribution across channels, making it easier to balance performance and utilization.

Rail Sense Limiter (RSL): The Rail Sense Limiter (RSL) technology is integral to the E4:2, significantly reducing signal clipping. This feature simplifies configuration for both constant voltage and low impedance loads, ensuring high-quality audio output and protecting the amplifier from overload conditions.

Built-In High-Pass Filter: Each channel of the E4:2 includes a built-in 50 Hz high-pass filter, which can be activated via a rear panel switch. This filter helps to eliminate low-frequency noise and improve overall audio clarity.

Cooling and Control Features: The amplifier employs a temperature-controlled fan with front-to-back airflow for efficient cooling. The front panel includes LEDs for power, temperature, signal, and limit indicators, while the rear panel offers per-channel attenuation knobs and signal LEDs for straightforward setup. Additionally, GPIO connectors enable remote control and integration with external systems.

Specifications

• Number of Channels: 2
• Total Output Power: 400 W
• Peak Output Voltage: 100 V / 70 Vrms
• Max Output Current: 11 Arms
• Impedance: 2, 4, 8, 16 Ohms; 70 V, 100 V
• THD (20 Hz – 20 kHz): <0.1%
• THD @ 1 kHz: <0.05%
• Signal-to-Noise Ratio: >112 dBA
• Frequency Response: 2 Hz – 40 kHz
• Input Impedance: 20 kΩ
• Output Impedance: 25 mΩ
• Power Consumption: 600 W
• Standby Consumption: <1 W
• Dimensions (W x H x D): 483 x 44 x 276 mm
• Weight: 4.2 kg (9.3 lbs)
• Finish: Dark grey aluminum front, black steel chassis