Lab Gruppen E10:4 - 1000 Watt Amplifier with 4 Flexible Output Channels for Installation Applications

Product Overview

The Lab Gruppen E 10:4 is a 1,000-watt, 4-channel Energy Star certified installation amplifier suited for commercial AV integrators specifying distributed audio in medium-sized commercial spaces. Delivering 4 x 250 W across independently configurable Lo-Z (2–16Ω) and Hi-Z (70 V) channels in a 1RU chassis, the E 10:4 is a practical choice for multi-zone office buildings, conference centers, houses of worship, and government facilities requiring per-zone impedance flexibility without additional hardware.

Product Description

The E 10:4 delivers 1,000 W of total output across four independently configurable channels, each capable of operating at 70 V Hi-Z or Lo-Z at 2, 4, 8, or 16 ohms. Per-channel mode selection is handled by the rear-panel RSL switch — a practical field feature that allows installers to configure the amplifier to match zone requirements without re-wiring or external transformers. A common deployment uses two channels for 70 V ceiling speaker circuits across multiple rooms and two channels for direct-drive low-impedance loudspeakers in a main listening area.

The IDEEA (IntelliDrive Energy Efficient Amplifier) Class-D output stage achieves operating efficiency above 80%, which significantly reduces mains current demand and heat generation compared to conventional Class-AB amplifiers of equivalent output. Energy Star certification is met through a combination of operating efficiency and auto-standby mode — the amplifier automatically enters sub-1 W standby after 20 minutes without input signal and powers back on when signal returns. This is particularly relevant for multi-amplifier installations where idle power reduction across many units has a meaningful operational cost impact.

The Rail Sense Limiter (RSL) monitors instantaneous output rail voltages per channel and adjusts limiting dynamically, reducing clipping artifacts and protecting connected loudspeakers under variable or asymmetric load conditions. Rear-panel per-channel level trimmers and signal-present LEDs simplify commissioning in the field. The front panel provides power, temperature, and per-channel signal and limit LED indicators. A GPIO connector on the rear panel supports contact-closure GPI and GPO for control system power state management.

Key Features

• 1,000 W Total Output, 4 Channels — 4 x 250 W at 4Ω, 8Ω, or 70 V per channel; Lo-Z operation at 2–16Ω.
• Energy Star Certified — Auto-standby below 1 W; operating efficiency >80%; auto-power-on on signal return.
• Per-Channel Lo-Z / Hi-Z Configuration — Each channel independently switchable between low-impedance and 70 V constant-voltage operation via rear-panel RSL switch.
• IDEEA Class-D Output Stage — IntelliDrive technology for high efficiency, reduced mains current draw, and low heat generation.
• Rail Sense Limiter (RSL) — Dynamic per-channel rail voltage monitoring reduces clipping and protects loudspeakers under variable load conditions.
• Asymmetric Channel Loading — Total 1,000 W distributable unequally across channels to match zone requirements.
• Built-In 50 Hz High-Pass Filter — Per-channel switchable from rear panel for speaker protection in distributed systems.
• GPIO Integration — Contact-closure GPI/GPO connector for control system power management.
• 1RU Form Factor — Standard 19" rack mounting; compact installation footprint.

Typical Applications

• Conference room and meeting space multi-zone distributed audio
• Huddle room and small commercial space ceiling speaker systems
• House of worship background and fill audio zones
• Government building paging and public address
• Training room and multi-purpose room distributed audio
• Commercial office building background music (70 V ceiling systems)

Technical Specifications

Frequently Asked Questions

Q: How many ceiling speakers can the E 10:4 drive across its four channels?

A: At 70 V, each channel delivers 250 W. The number of speakers per channel depends on each speaker's wattage tap. For example, eight 30 W tapped speakers would total 240 W per channel — within the channel rating. Total tap loads should not exceed 250 W per channel.

Q: Is the E 10:4 Energy Star certified?

A: Yes. The E 10:4 carries Energy Star certification, achieved through operating efficiency above 80% and auto-standby consumption below 1 W after 20 minutes without an input signal.

Q: Can channels be mixed between Lo-Z and Hi-Z modes?

A: Yes. Each channel has an independent RSL mode switch on the rear panel, so each can be configured independently for Lo-Z (2–16Ω) or Hi-Z (70 V) operation within the same installation.

Q: Does the E 10:4 require an external DSP processor?

A: The E 10:4 is an analog installation amplifier without onboard DSP. Signal processing should be handled by an upstream DSP processor or digital audio system connected to the balanced analog inputs.

Q: What control system interfaces does the E 10:4 support?

A: The GPIO connector provides contact-closure GPI (power control input) and GPO (power state output) for integration with Crestron, AMX, or other control systems. There is no Ethernet or network interface on this model.

Q: How is the amplifier commissioned in the field?

A: Each channel has a rear-panel level attenuation potentiometer and a signal-present LED. These allow per-channel gain adjustment and signal verification without requiring test equipment or a laptop.