Lab Gruppen E 10:4 - 250W 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 10:4 is a versatile and energy-efficient 250W, 4-channel amplifier designed for commercial and industrial sound systems. Combining Lab Gruppen's renowned sonic performance with cutting-edge energy-saving technologies, the E 10:4 is ideal for large venues, retail environments, corporate settings, and installations requiring both high audio fidelity and long-term cost-effectiveness. The amplifier is equipped with Smart Green credentials, ensuring it delivers outstanding sound while maintaining low operational costs through its Energy Star certification and low power consumption features.

At the heart of the E 10:4 is Lab Gruppen's proprietary IDEEA (IntelliDrive Energy Efficient Amplifier) technology, which uses a Class D output stage to deliver high power with minimal distortion. This innovative design allows the amplifier to achieve maximum efficiency while drawing minimal current, reducing the overall energy footprint. The amplifier's advanced Rail Sensing Limiter (RSL) technology also ensures high-quality output by optimizing each channel based on real-time load conditions. The RSL feature reduces signal clipping and enables asymmetric loading, allowing you to configure each output channel independently for different load types (e.g., low-impedance or 70V systems). This flexibility allows for configurations where a subwoofer, ceiling speakers, and full-range loudspeakers can all be driven from different channels at the same time.

The E 10:4 offers 250W per channel at 4Ω, 8Ω, or 16Ω, and 70V/100V for constant voltage applications, providing flexibility to power various speaker configurations. The amplifier also offers flexibility in output allocation across channels, meaning power can be dynamically distributed to different channels as needed. For example, a higher power output can be routed to a subwoofer channel while smaller, distributed ceiling speakers can be powered from other channels, optimizing both performance and efficiency. The ability to configure the amplifier for either low-impedance or high-impedance (constant voltage) loads on each channel adds a layer of customization to meet the needs of any installation.

Lab Gruppen's innovative IDEEA architecture ensures that the E 10:4 amplifier delivers exceptional performance while consuming less power during idle times. With the auto-standby feature, the amplifier will automatically enter a low-power standby mode after 20 minutes of inactivity, drawing less than 1W of power. The system can also be remotely controlled via contact closure (GPI) to activate or deactivate the power state, ensuring seamless integration into automated or remote systems.

In terms of sound quality, the E 10:4 is engineered for exceptional clarity, boasting a frequency response from 2 Hz to 40 kHz, with a low total harmonic distortion (THD) of less than 0.05% at 1 kHz just below clipping. The amplifier also features a high signal-to-noise ratio of over 106 dBA, ensuring that the audio output remains clear and free from unwanted noise, even at high volumes. The E 10:4's performance is further optimized with high-quality, balanced analog inputs and detachable screw terminals for secure and reliable connections. Output connectors are also available with screw terminals for easy integration into a variety of speaker systems.

The amplifier features a built-in 50 Hz high-pass filter that is selectable per channel via a rear panel switch, enabling easy configuration for specific installations. The rear panel also features per-channel level attenuation knobs, signal LEDs for easy setup and monitoring, and power control inputs/outputs for system integration. The front panel offers power and temperature LEDs, with per-channel signal and limit LEDs for visual feedback on amplifier performance during operation.

Designed with user-friendly maintenance in mind, the E 10:4 is housed in a compact 1U rackmountable chassis with a sleek dark gray aluminum front panel and black steel chassis. The amplifier is cooled by temperature-controlled fans, with front-to-rear airflow to minimize noise and ensure efficient operation even under demanding conditions. It's an ideal solution for any professional sound installation that demands a combination of performance, energy efficiency, and reliability.

Features

• 250W per channel at 4Ω, 8Ω, 16Ω, and 70V/100V for flexible speaker configurations
• Lab Gruppen IDEEA technology for high power output with minimal distortion and low current draw
• Rail Sensing Limiter (RSL) reduces signal clipping and optimizes each output for real-time load conditions
• Energy Star certified with auto-standby mode, reducing power consumption to less than 1W during inactivity
• Asymmetric channel loading allows for flexible allocation of output power across channels
• High-quality analog inputs with detachable screw terminals for reliable connections
• 50 Hz high-pass filter switchable per channel for customizable system setup
• Per-channel attenuation knobs, signal LEDs, and temperature-controlled fans for easy monitoring and cooling
• Compact 1U rackmountable chassis with aluminum front panel and black steel chassis
• Dimensions: 1.7 x 19 x 15 inches; weight: 14.7 lbs
• CE, ETL (ANSI/UL, CSA), PSE, RCM, BIS, CCC certified

Specifications

General

• Number of powered channels: 4
• Total output all channels driven: 1000 W
• Max output voltage per channel: 100 Vp / 70 Vrms
• Max output current per channel: 14 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: N/R
• 4 Ω load: 1 dBu: 250 W @ Lo-Z mode
• 8 Ω load: 4 dBu: 250 W @ Lo-Z mode
• 16 Ω load: 4 dBu: 125 W @ Lo-Z mode / 3 dBu: 250 W @ 70 V mode
• 70 V load: 4 dBu: 250 W @ 70 V mode
• 100 V load: 4 dBu: 250 W @ 70 V mode into 100 V load tapped @ 500 W

Sensitivity and Maximum Output Power (single channel max)

• 2 Ω load: N/R
• 4 Ω load: 4 dBu: 500 W @ Lo-Z mode / 2 dBu: 750 W @ 70 V mode
• 8 Ω load: 4 dBu: 250 W @ Lo-Z mode / 4 dBu: 625 W @ 70 V mode
• 16 Ω load: 4 dBu: 125 W @ Lo-Z mode / 4 dBu: 310 W @ 70 V mode
• 70 V load: 4 dBu: 750 W @ 70 V mode
• 100 V load: 4 dBu: 750 W @ 70 V mode into 100 V load tapped @ 1500 W

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): 2 positions: 70 V and Lo-Z
• Max output voltage, LIMIT switch pos A (70 V): 100 Vp / 70 Vrms
• Max output voltage, LIMIT switch pos B: N/A
• Max output voltage, LIMIT switch pos C (Lo-Z): 63 Vp / 45 Vrms
• Gain in LIMIT switch pos A (70 V): 35.2 dB
• Gain in LIMIT switch pos B: N/A
• Gain in LIMIT switch pos C (Lo-Z): 31.2 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: Two fans, front to rear airflow, temperature controlled speed

Power

• Nominal voltage: 100 - 240 VAC
• Power consumption: 250 W
• Standby consumption: <1 W
• Mains connector: Standard IEC receptacle

Physical

• Dimensions (HWD): 1.7 x 19 x 15 inches
• Weight: 14.7 lbs
• Finish: Dark grey aluminium front and black steel chassis