Lab Gruppen E 40:2 4,000 Watt Amplifier with 2 Flexible Output Channels for Installation Applications

Product Overview

The Lab Gruppen E 40:2 is a 4,000-watt, 2-channel installation amplifier engineered for commercial AV applications requiring high continuous power in a 1RU chassis. With 2 x 2,000 W available at 4 ohms and per-channel Lo-Z/Hi-Z switching, it is well suited for driving large-format loudspeaker arrays, high-power subwoofers, or dual independent zone systems in auditoriums, houses of worship, and multi-purpose venues. Energy Star certification and the IDEEA Class-D platform provide operating efficiency above 80% for reduced lifetime running costs.

Product Description

The E 40:2 delivers the full 4,000 W of the E Series flagship output in a 2-channel configuration, providing each channel with significantly more headroom than a 4-channel variant at the same total power rating. This makes it the preferred choice for integrators powering high-SPL applications, line arrays, or large passive subwoofers where per-channel current capability matters. Each channel is independently switchable between Lo-Z (2, 4, 8, or 16 ohms) and Hi-Z (70 V or 100 V constant-voltage) operation via the rear-panel RSL switch, requiring no external transformers or re-wiring when system requirements change.

The IDEEA (IntelliDrive Energy Efficient Amplifier) output stage is based on a proprietary Class-D topology that achieves high output with minimal mains draw — the E 40:2 draws 1,000 W from mains at full output, well below what a Class-AB amplifier of equivalent power would require. Standby consumption is under 2.5 W, and the auto-standby/auto-power-on function activates after 20 minutes without an input signal, satisfying Energy Star requirements and reducing idle power in large installations.

The Rail Sense Limiter monitors instantaneous rail voltages per channel and adjusts limiting dynamically, which reduces clipping artifacts under asymmetric or varying load conditions. Asymmetric channel loading allows the 4,000 W total budget to be allocated unequally — for example, 3,000 W to a main system and 1,000 W to a fill speaker zone. Field commissioning is simplified by rear-panel per-channel attenuation trimmers and signal-present LEDs. A GPIO connector supports third-party control system integration for remote power state management.

Key Features

• 4,000 W Total Output, 2 Channels — Delivers 2 x 2,000 W into 2Ω or 4Ω, 2 x 1,600 W into 8Ω, 2 x 800 W into 16Ω, and 2 x 2,000 W into 70 V or 100 V Hi-Z.
• Per-Channel Lo-Z / Hi-Z Switching — Each channel independently configured for low-impedance (2–16Ω) or constant-voltage (70 V / 100 V) operation via rear-panel RSL switch.
• IDEEA Class-D Output Stage — IntelliDrive technology provides high power output with 1,000 W mains draw and reduced heat generation.
• Energy Star Certified — Auto-standby below 2.5 W; auto-power-on on signal return; >80% operating efficiency.
• Rail Sense Limiter (RSL) — Dynamic per-channel rail voltage monitoring minimizes clipping under mixed or variable loads.
• Asymmetric Channel Loading — 4,000 W total headroom distributable unequally across channels to match system zone requirements.
• Built-In 50 Hz High-Pass Filter — Per-channel rear-panel switch; eliminates subsonic content for speaker protection.
• GPIO Integration — Contact-closure GPI/GPO for Crestron, AMX, or BMS power state control and monitoring.
• 1RU Form Factor — 44 x 483 x 417 mm, 8.1 kg; high power density in a single rack space.
• Universal Mains Input — 100–240 VAC via standard IEC receptacle.

Typical Applications

• Auditorium and large multi-purpose room main systems
• House of worship high-SPL speaker arrays
• Boardroom and executive conference room high-power zones
• Government and municipal assembly hall audio
• Broadcast studio monitoring or recording playback
• All-hands room and large training room installations

Technical Specifications

Frequently Asked Questions

Q: What is the difference between the E 40:2 and the E 40:4?

A: Both amplifiers share the same 4,000 W total output. The E 40:2 concentrates that power across 2 channels (2,000 W each at 4Ω), making it better suited for high-power two-zone or main/fill configurations. The E 40:4 distributes 4,000 W across 4 channels (1,000 W each at 4Ω), offering greater zone granularity at lower per-channel power.

Q: Can the E 40:2 run one channel in Hi-Z and the other in Lo-Z simultaneously?

A: Yes. Each channel has its own independent RSL mode switch, so one channel can operate at 70 V/100 V for a distributed ceiling speaker zone while the other drives a low-impedance loudspeaker.

Q: Is the E 40:2 suitable for driving large subwoofers?

A: Yes. With 2,000 W available per channel into 2 or 4 ohms, the E 40:2 is well matched to high-power passive subwoofers in commercial installations including auditoriums and houses of worship.

Q: How does the auto-standby function work?

A: After 20 minutes of no input signal, the amplifier automatically enters standby mode with consumption below 2.5 W. It automatically powers on when an input signal returns, eliminating the need for manual power management in unattended installations.

Q: What control system interfaces are available?

A: The GPIO connector provides contact-closure GPI (power control input) and GPO (power state output) for integration with Crestron, AMX, building management, or custom relay control systems.

Q: What mains supply does the E 40:2 require?

A: The universal switch-mode power supply accepts 100–240 VAC via a standard IEC receptacle — no voltage selection required, suitable for North American and international installations.