Lab Gruppen E 40:4 - 1000W 4-Channel at 4-Ohm 70V/100V Power Amplifier with Screw Terminal Inputs/Outputs and Energy Star Certification in Dark Gray Finish

The Lab Gruppen E 40:4 is a high-performance, energy-efficient amplifier that offers remarkable power output and operational flexibility for a range of professional audio applications. Built for demanding environments such as large venues, conference halls, and installations requiring consistent, high-quality audio delivery, the E 40:4 provides a robust solution that combines exceptional power output with energy-saving technologies. Featuring 4 flexible output channels, the E 40:4 delivers a total output of 4000W, with up to 1000W per channel, making it ideal for both low impedance and constant voltage systems.

At the core of the E 40:4 is Lab Gruppen's patented IntelliDrive Energy Efficient Amplifier (IDEEA) technology, which utilizes a Class D output stage for high power output with low distortion. This innovative design ensures that the amplifier draws minimal mains current while delivering maximum performance, making it energy efficient and reducing the overall running costs of the installation. Lab Gruppen's proprietary Rail Sensing Limiter (RSL) further enhances the amplifier's performance by preventing signal clipping and dynamically optimizing output for varying load conditions. This unique feature allows the E 40:4 to perform efficiently under different operational demands, such as driving a mix of low impedance speakers and 70V/100V distributed loudspeakers.

The amplifier is highly versatile, offering users the flexibility to configure the output for either low impedance (Lo-Z) or constant voltage (Hi-Z) systems, allowing it to accommodate a wide range of speaker configurations. The E 40:4 delivers up to 1000W per channel at 4 ohms, 625W at 16 ohms, and up to 1000W at both 70V and 100V. It can also handle higher power output in single-channel mode, making it capable of driving powerful subwoofers or other high-demand speakers in a mono setup. The amplifier's ability to load channels asymmetrically maximizes overall system efficiency and helps optimize inventory usage, making it an ideal choice for large-scale installations where system flexibility and efficiency are paramount.

The E 40:4 is also designed to meet the rigorous requirements of Energy Star certification, ensuring that it operates with high efficiency and contributes to low lifetime running costs. With an operating efficiency of greater than 80%, it minimizes heat generation and lowers demands on the installation's mains distribution and cooling systems. Additionally, its auto-standby feature reduces power consumption to below 2.5W when the amplifier is idle, automatically resuming operation when a signal is detected. This ensures that the amplifier runs efficiently without unnecessary power draw during non-operating cycles.

The amplifier comes equipped with multiple protective features that ensure reliable operation, even under demanding conditions. These include comprehensive fail-safe circuits such as temperature protection, short circuit protection, and overload safeguards. A 50Hz high-pass filter is also included, selectable per channel, to protect speakers from low-frequency signals that may cause damage. For ease of integration and setup, the E 40:4 includes rear panel controls for per-channel attenuation, signal LEDs, and level adjustments. The efficient cooling system, consisting of four temperature-controlled fans with front-to-rear airflow, keeps the amplifier running cool even during extended operation.

The Lab Gruppen E 40:4 is a highly efficient, flexible, and powerful amplifier that provides exceptional performance in large-scale, energy-conscious audio installations. Its combination of energy-saving features, high power output, and advanced technology makes it an ideal solution for demanding environments that require reliable performance and low operational costs.

Features

• 4000W total output with 4 flexible channels, up to 1000W per channel at 4 ohms, 625W at 16 ohms, and 1000W at 70V/100V
• Energy Star certified for low operational costs and high energy efficiency
• Lab Gruppen's IntelliDrive Energy Efficient Amplifier (IDEEA) technology for superior performance with minimal power draw
• Rail Sensing Limiter (RSL) to reduce signal clipping and optimize output for various load conditions
• Asymmetric channel loading for maximum efficiency and inventory utilization
• Auto-standby feature with less than 2.5W standby consumption
• Built-in 50Hz high-pass filter selectable per channel for speaker protection
• Per-channel attenuation knobs and signal LEDs for simple setup and commissioning
• Efficient cooling with four temperature-controlled fans and front-to-rear airflow
• Dimensions: 1.7 x 19 x 16.4 inches
• Weight: 17.8 lbs
• Finish: Dark grey aluminum front and black steel chassis

Specifications

General

• Number of powered channels: 4
• Total output all channels driven: 4000 W
• Max output voltage per channel: 141 Vp / 100 Vrms
• Max output current per channel: 21.2 Arms
• Asymmetric load operation: Units are capable of delivering extra power to one channel while sending significantly less to the other. See "single ch. max" below the "all channels driven"

Sensitivity and Maximum Output Power (all channels driven)

• 2 Ω load: 4 dBu: 900 W @ 42 V mode
• 4 Ω load: 3 dBu: 1000 W @ 70 V mode
• 8 Ω load: 3 dBu: 1000 W @ 100 V mode
• 16 Ω load: 4 dBu: 625 W @ 100 V mode
• 70 V load: 4 dBu: 1000 W @ 70 V mode
• 100 V load: 4 dBu: 1000 W @ 100 V mode

Sensitivity and Maximum Output Power (single channel max)

• 2 Ω load: 4 dBu: 900 W @ 42 V mode
• 4 Ω load: 4 dBu: 1750 W @ 70 V mode
• 8 Ω load: 4 dBu: 1250 W @ 100 V mode
• 16 Ω load: 4 dBu: 625 W @ 100 V mode
• 70 V load: 4 dBu: 1450 W @ 70 V mode
• 100 V load: 4 dBu: 2000 W @ 100 V mode

Performance

• THD (20 Hz - 20 kHz @ 1 W into 8 Ω): <0.1%
• THD @ 1 kHz, 1 dB below clipping: <0.05%
• Signal-to-noise ratio: >106 dBA
• Channel separation (crosstalk) @ 1 kHz: >70 dB
• Frequency response: 2 Hz - 40 kHz
• Input impedance: 20 kΩ
• Input common mode rejection, CMR: 50 dB
• Output impedance: 25 mΩ

Limiters and Gain

• LIMIT switch (per channel): 3 positions: A, B and C
• Max output voltage, LIMIT switch pos A (70 V): 141 Vp / 100 Vrms
• Max output voltage, LIMIT switch pos B: 100 Vp / 70 Vrms
• Max output voltage, LIMIT switch pos C (Lo-Z): 59 Vp / 42 Vrms
• Gain in LIMIT switch pos A (70 V): 38.2 dB
• Gain in LIMIT switch pos B: 35.2 dB
• Gain in LIMIT switch pos C (Lo-Z): 30.7 dB
• Level adjustment (per channel): Rear panel potentiometer, detented from -∞ to 0 dB

Connectors and Switches

• Input connectors (per channel): 3-pin detachable screw terminals, electronically balanced
• Output connectors (per channel): 2-pin detachable screw terminals
• High pass filter: Fixed at 50 Hz, switchable per channel
• Power control: Can be used to go between standby and ON, unit will also enter standby automatically after 20 min of inactivity and resume when signal is present
• GPI (power control input): Contact closure type, 2-pin detachable screw terminal, controls the power state
• GPO (power state output): Contact closure type, 2-pin detachable screw terminal, for external monitoring of the power state
• Cooling: Four fans, front to rear airflow, temperature controlled speed

Power

• Nominal voltage: 100 - 240 VAC
• Power consumption: 1000 W
• Standby consumption: <2.5 W
• Mains connector: Standard IEC receptacle

Physical

• Dimensions (HWD): 1.7 x 19 x 16.4 inches
• Weight: 17.8 lbs
• Finish: Dark grey aluminium front and black steel chassis