Lab Gruppen E 5:4 500 Watt Amplifier with 4 Flexible Output Channels for Installation Applications

Product Overview

The Lab Gruppen E 5:4 is a 500-watt, 4-channel Energy Star certified commercial installation amplifier purpose-built for distributed audio systems in offices, meeting rooms, and light commercial environments. Four independently configurable channels — each switchable between Lo-Z (4–16Ω) and 70 V Hi-Z operation — allow a single 1RU unit to serve multiple zone types simultaneously. The IDEEA Class-D platform delivers operating efficiency above 80% and sub-1 W standby consumption for reduced lifetime operating costs in multi-amplifier installations.

Product Description

The E 5:4 is Lab Gruppen's entry-level 4-channel E Series installation amplifier, delivering 500 W total output at 4 x 125 W per channel. Despite its compact 1RU size and entry price point, the E 5:4 shares the same IDEEA Class-D output platform and Rail Sense Limiter (RSL) technology as the higher-power E Series models — providing consistent audio performance, flexible impedance operation, and Energy Star compliance across the entire range.

Each channel is independently configurable for Hi-Z constant-voltage operation at 70 V or Lo-Z operation at 4, 8, or 16 ohms using the rear-panel RSL mode switch. Asymmetric loading is supported by the RSL system, allowing the 500 W total budget to be distributed unequally across channels to match zone requirements. A built-in 50 Hz high-pass filter is switchable per channel from the rear panel for speaker protection in distributed systems without subwoofer support.

The IDEEA architecture delivers Lab Gruppen's Energy Star compliant efficiency: net operating efficiency above 80% during active use, and automatic standby below 1 W after 20 minutes without input signal. Auto-power-on restores full operation when signal returns, making the E 5:4 appropriate for scheduled or unattended installations. GPIO contact-closure interfaces on the rear panel enable integration with Crestron, AMX, or other control systems for remote power state management.

Key Features

• 500 W Total Output, 4 Channels — 4 x 125 W at 4Ω, 8Ω, and 70 V Hi-Z per channel.
• Energy Star Certified — Operating efficiency >80%; auto-standby <1 W; auto-power-on on signal return.
• Per-Channel Lo-Z / Hi-Z Configuration — Each channel independently switchable between low-impedance (4–16Ω) and 70 V constant-voltage via rear-panel RSL switch.
• IDEEA Class-D Output Stage — Lab Gruppen IntelliDrive platform for high efficiency and low thermal output.
• Rail Sense Limiter (RSL) — Per-channel dynamic limiter reduces clipping and protects loudspeakers under mixed or variable loads.
• Asymmetric Channel Loading — 500 W total distributable unequally across channels.
• Built-In 50 Hz High-Pass Filter — Per-channel switchable from rear panel for speaker protection.
• GPIO Integration — Contact-closure GPI/GPO for control system power management.
• 1RU Form Factor — 483 x 44 x 381 mm (19" x 1U x 15"), 6 kg; designed and engineered in Sweden.

Typical Applications

• Huddle room and small meeting space multi-zone audio
• Commercial office background music and paging systems
• Conference room 70 V ceiling speaker distribution
• House of worship overflow and lobby fill zones
• Training room and multi-purpose room background audio
• Government building paging and zone audio

Technical Specifications

Frequently Asked Questions

Q: Is this the same amplifier as the E5:4 (E 54-UL) listing?

A: Yes. Both listings refer to the same Lab Gruppen E 5:4 model with identical specifications. If you have questions about which listing is appropriate for your order, contact our sales team.

Q: How many 70 V ceiling speakers can the E 5:4 support per channel?

A: Each channel delivers 125 W at 70 V. The speaker count depends on each fixture's wattage tap setting. For example, five speakers tapped at 24 W each total 120 W — within the per-channel rating. Do not exceed 125 W total tap load per channel.

Q: Does the E 5:4 support 100 V constant-voltage systems?

A: The E 5:4 operates natively at 70 V Hi-Z. It can deliver 125 W to a 100 V load tapped at 250 W, but it is primarily rated for 70 V distribution. The larger E Series models (E 20:2 and above) fully support both 70 V and 100 V Hi-Z modes.

Q: What happens if the input signal is interrupted?

A: After 20 minutes without an input signal, the amplifier automatically enters standby mode consuming under 1 W. It returns to full operation automatically when an input signal is detected, requiring no manual intervention.

Q: Does the E 5:4 include any onboard DSP?

A: No. The E 5:4 is a pure analog installation amplifier. Signal processing such as EQ, crossover, or delay should be provided by an upstream DSP processor connected to the balanced analog inputs.

Q: What is the warranty on the E 5:4?

A: Lab Gruppen offers a 3-year warranty covering components and factory workmanship on E Series installation amplifiers, with an optional extended warranty program available through authorized dealers.