Lab Gruppen E5:4 US1 Multi-Zone Paging Microphone Console

The Lab Gruppen E5:4 is a compact, energy-efficient 4-channel amplifier designed for commercial installations requiring high performance, flexible output configuration, and long-term reliability. Built on Lab Gruppen’s touring-grade engineering, the E Series delivers exceptional audio quality in a small footprint with low operating costs.

Powered by IDEEA (IntelliDrive Energy Efficient Amplifier) technology, the E5:4 offers high power with very low distortion while drawing minimal current. The Rail Sensing Limiter (RSL™) optimizes each channel for Hi-Z (70 V) or Lo-Z applications and allows asymmetric power distribution. This enables mixed-load systems—such as driving ceiling speakers, full-range speakers, and subs—from a single amplifier.

With Energy Star–qualified efficiency, the E5:4 consumes less than 1 W in auto standby and instantly resumes full operation when signal returns. Remote power control and monitoring are available via GPIO for integration with third-party control systems.

Designed for reliability, efficiency, and installation flexibility, the E5:4 is ideal for commercial spaces, hospitality, education, retail, and multi-zone audio systems.

Key Features

• 4-channel installation amplifier with 500 W total output

• IDEEA energy-efficient Class D technology for low consumption and high performance

• RSL™ allows Hi-Z or Lo-Z operation, with flexible asymmetric channel loading

• Energy Star compliant with auto standby (<1 W)

• Advanced limiting for clean, consistent audio at all levels

• Remotely controllable power state via GPI/GPO

• Compact 1U design with temperature-controlled cooling

• Ideal for mixed-use distributed audio systems

Specifications

General

• Channels: 4

• Total output (all channels): 500 W

• Peak output voltage per channel: 100 V / 70 Vrms

• Max output current: 9.9 Arms

Output Power (All Channels Driven)

• 4/8/16 ohms: 125 W

• 70 V: 125 W

• 100 V: Supports 125 W into a 100 V load tapped at 250 W

Performance

• THD (20 Hz–20 kHz @ 1 W): <0.1%

• THD (1 kHz, 1 dB below clipping): <0.05%

• SNR: >112 dBA

• Crosstalk (1 kHz): >70 dB

• Frequency response: 2 Hz – 40 kHz

Input / Output

• Input: 3-pin detachable screw terminals, balanced

• Output: 2-pin detachable screw terminals

• High-pass filter: 50 Hz, switchable per channel

Gain & Sensitivity

• Modes: Lo-Z and 70 V

• Gain: 28.2 dB (Lo-Z), 35.2 dB (70 V)

• Sensitivity: 0–4 dBu depending on load/mode

• Per-channel level control: –∞ to 0 dB

Control & Monitoring

• Power control (standby/ON)

• GPI: Contact closure input

• GPO: Contact closure output

Cooling

• Dual fans, front-to-rear airflow

Power

• Nominal voltage: 100–240 VAC

• Operating voltage: 85–265 VAC

• Standby consumption: <1 W

• Mains connector: IEC

Dimensions & Weight

• 19" W × 1U H × 15" D (483 × 44 × 381 mm)

• Weight: 6 kg (13.2 lb)

Finish

• Dark grey aluminum front, black steel chassis