Lab Gruppen D 10:4L - 250W 4-Channel at 4-Ohm 70V/100V Power Amplifier with Lake DSP and Dante Audio Networking in Black Finish

The Lab Gruppen D 10:4L is a powerful and highly flexible 250W per channel, 4-channel amplifier designed for commercial, industrial, and professional audio systems where superior sound quality and reliability are essential. Ideal for demanding applications in stadia, arenas, convention centers, and other large-scale installed sound environments, this amplifier combines cutting-edge performance with energy-efficient technologies. The D 10:4L integrates Lab Gruppen's renowned Rational Power Management (RPM) technology, which allows users to allocate available power across channels for maximum efficiency, reducing the need for excess amplifier inventory and optimizing power usage.

At the heart of the D 10:4L is its advanced Lake Processing technology, providing unrivaled loudspeaker management and system control. This includes features such as crossover management, EQ, delay, and peak/RMS limiting with Lab Gruppen's LimiterMax. The amplifier also supports Dante digital audio networking, ensuring reliable, high-quality, and low-latency audio distribution across the network with support for AES67 and a flexible dual-redundant topology. The amplifier is designed to integrate seamlessly into complex audio systems, with compatibility for both analog and digital inputs, as well as advanced control via third-party systems like MediaMatrix and Q-Sys.

With its 4 channels, the D 10:4L delivers 250W per channel at 4Ω, 8Ω, or even at Hi-Z 70V and 100V configurations. This flexibility makes it well-suited for a wide range of speaker setups, from traditional low-impedance speakers to constant voltage systems in large venues. The D 10:4L's digital amplifier stage delivers exceptional audio quality with very low total harmonic distortion (THD+N), dynamic range of over 112 dB, and a frequency response of +0.05 dB from 20 Hz to 20 kHz, ensuring crystal-clear sound across the entire audio spectrum. Additionally, the high-power output at 2Ω per channel (850W) allows for extreme versatility in larger or more demanding systems.

In terms of connectivity, the D 10:4L features a comprehensive array of inputs, including 4 analog channels with Iso-Float ground isolation, 4 AES/EBU digital inputs with sample rates up to 192 kHz, and 2 Neutrik etherCON RJ-45 ports for dual-redundant Dante digital audio networking. These inputs are easily configurable via the Lake Controller and Dante Controller software, which enable straightforward system setup and configuration. Additionally, the amplifier's integrated pilot tone generation and analysis, along with load impedance analysis, ensure continuous system health monitoring and performance optimization.

The D 10:4L also features advanced power management systems, such as Power Factor Correction (PFC) and a regulated switch mode power supply (R.SMPS), which significantly reduce operating costs and minimize environmental impact. The Breaker Emulation Limiter (BEL) ensures that the amplifier's power consumption does not trip main circuit breakers by adjusting the mains current draw threshold to match the electrical infrastructure. The unit also features Under-Voltage Limiting (UVL) to ensure stable operation even during severe mains voltage drops.

Designed with reliability in mind, the D 10:4L includes comprehensive protection features such as current average limiters, short-circuit protection, and high-frequency protection. Its temperature-regulated fans provide efficient cooling with front-to-rear airflow, ensuring optimal performance under demanding conditions. The amplifier is housed in a rugged 1U rackmount chassis with a detachable grille for easy maintenance and air circulation. The D 10:4L is engineered to perform continuously in mission-critical environments, where system uptime and performance are paramount.

Whether you are designing a large-scale audio installation or integrating advanced DSP and networked audio capabilities into your system, the Lab Gruppen D 10:4L provides a reliable, high-performance solution that meets the rigorous demands of professional audio environments.

Features

• 4-channel amplifier delivering 250W per channel at 4Ω, 8Ω, and Hi-Z 70V/100V configurations
• Lake Processing technology for advanced loudspeaker management, including crossover, EQ, delay, and peak/RMS limiting
• Integrated Dante digital audio networking with AES67 support for flexible audio distribution
• Supports both analog and digital inputs, with 4 AES/EBU inputs and 4 analog channels with Iso-Float ground isolation
• Power Factor Correction (PFC) and R.SMPS for energy-efficient operation and reduced environmental impact
• Rational Power Management (RPM) for optimized power distribution across channels, reducing amplifier inventory
• Comprehensive protection features including thermal, overcurrent, DC, and short circuit protection
• Designed for demanding installations such as stadia, arenas, and convention centers
• High-quality audio performance with <0.05% THD+N, 112 dB dynamic range, and +0.05 dB frequency response from 20 Hz to 20 kHz
• Rackmountable 1U chassis with detachable grille for efficient airflow and maintenance
• Dual-redundant Dante interfaces via Neutrik etherCON RJ-45 ports
• Front panel with tri-color LEDs for system and channel status, mute controls, and power state indication
• Dimensions: 19 x 1.75 x 16.7 inches; weight: 17.1 lbs
• CE, ETL, PSE, RCM, BIS, CCC certified

Specifications

General

• Processing / Network: Lake / Dante
• Number of amplifier channels: 4
• Total burst power all channels (share among channels with RPM): 1000 W

Maximum Output Power (all channels driven)

• 2 ohms: 250 W
• 2.67 ohms: 250 W
• 4 ohms: 250 W
• 8 ohms: 250 W
• 16 ohms: 250 W
• Hi-Z 25 V: 250 W
• Hi-Z 70 V: 250 W
• Hi-Z 100 V: 175 W

Maximum Output Power Single Channel (all models)

• 2 ohms: 850 W
• 2.67 ohms: 1000 W
• 4 ohms: 1000 W
• 8 ohms: 1000 W
• 16 ohms: 600 W
• Hi-Z 25 V: 500 W
• Hi-Z 70 V: 1000 W
• Hi-Z 100 V: 700 W

Amplifier Output Modules (all models, all channels)

• Peak output voltage: 142 Vpk
• Max output current: 30 Apk
• Rational Power Management (RPM): Yes
• Default voltage limitation (can be lifted with RPM configuration): 65 Vpk
• Protection features: Current Average Limiter (CAL), Very High Frequency Protection (VHF), Direct Current Protection (DC), Short Circuit Protection, Current-Clip Limiter, Voltage Clip Limiter, Temperature protection

Amplifier Platform

• Inter Sample Voltage Peak Limiter (ISVPL): Configurable Peak voltage threshold and profile
• Amplifier gain: Digital configurable amplifier gain 22 - 44 dB
• Pilot tone generation and analysis: Yes
• Load impedance analysis: Yes
• Temperature control: Temperature regulated fans (front-to-rear airflow) and show must go on limitation (ATL, PTL)

Audio Performance (Amplifier Platform with Digital Input)

• THD + N 20 Hz - 20 kHz for 1 W: < 0.05%
• THD + N at 1 kHz and 1 dB below clipping: < 0.04%
• Dynamic range: > 112 dB
• Channel separation (Crosstalk) at 1 kHz: > 70 dB
• Frequency response (1 W into 8 ohms, 20 Hz - 20 kHz): +/- 0.05 dB
• Internal sample rate / Data path: 96 kHz / 32 bit floating point
• Product propagation delay AES 96 kHz / analog input: 1.61 / 1.68 ms

Lake Processing

• Loudspeaker processing: Up to 4 modules of Classic/linear-phase/FIR crossover, EQ, delay, LimiterMax - peak and RMS limiters
• System tuning: Group control with Raised Cosine MESA EQ asymmetric filters
• Input redundancy / Matrix: Automatic 4 level input redundancy / 4 input mixers
• System integration: Comprehensive 3rd party protocol over UDP Ethernet

Dante Audio Network

• Dante I/O: 8 x 8
• Network topology / redundancy: Flexible topology / Supports Dual redundant networks
• Sample rates / transport: 48, 96 kHz / Unit / Multicast
• Network latency: 0.25, 0.5, 1.0, 2.0, 5.0 ms

Analog Inputs

• Inputs: 4 high quality inputs with Iso-Float ground isolation
• Maximum input / digital reference: +26 dBu / +21 dBu
• Sampling rate / resolution: 96 kHz / 24 bit
• Input impedance balanced / unbalanced: 20 kΩ / 10 kΩ
• THD + N (typical at 1 kHz unweighted): 0.000022%
• THD + N (typical at 20 Hz and 20 kHz unweighted): 0.000033%

AES Inputs

• Inputs: 4 AES inputs
• Supported sample rates / resolution: 44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bit
• Sample rate conversion THD + N 20 Hz - 20 kHz unweighted: 0.00003%

Back Panel Interface

• Analog inputs: 4 x Terminal block connectors analog input with +, - and ground
• AES inputs: 4 x Terminal block connectors analog input with +, - and ground
• Output connectors: 4 x 2 pole Terminal block connectors rated at 1000 V / 41 A (exceeding amplifier capacity). Can take up to 8 mm² (8.2 AWG) cables
• Ethernet ports: 2 x EtherCon RJ45 Lake Controller, Dante controller and/or DLM (3rd party protocol)
• Detachable mains cord: Detachable locking 3-pin IEC rated at 250 V / 16 A

Front Panel User Interface

• System status indication: 3 x tri-color LED, FRAME, TEMP, PSU for device status indication
• Channel status indication: 3 x tri-color LED per channel. Status indication separated for channel LOAD, AMP, SIGNAL status
• Mute: Per channel touch button for MUTE control and tri-color LED for indication
• Power: Touch button for ON/STANDBY control and tri-color LED for power state indication
• Select: Touch button and LED for bi-directional device software select functionality

Mains Power

• Nominal voltage: 100 - 240 V AC 50 - 60 Hz
• Operating voltage: 70 - 265 V AC 45 - 66 Hz
• Mains wall plug: Selectable on order - CEE 7/7 “Schuko” 230 V / 16 A, NEMA 5-15 125 V / 15 A, BS1363-A 250 V / 13 A, 1A16A3 250 V / 16 A, AU/NZ 250 V / 10 A, JP 125 V / 15 A, CPCS-CCC 250 V / 10 A

Power Supply Features

• Soft start / Inrush power: Yes
• Power factor correction: > 0.98 for mains power > 300 W
• Regulated switch mode power supply (R.SMPS): Yes
• Breaker Emulation Limiter (BEL): Configurable mains current threshold and breaker profile (profile only D 40)
• BEL max current threshold: 7 A
• Power Average Limiter (PAL): Yes
• Under Voltage Limiter (UVL): No
• Mains undervoltage and overvoltage protection and mains glitch tolerance: Yes
• Adaptive Rail Control: Optional green mode for improved efficiency at low output levels

Physical

• Dimensions:
  • Rack rail to rear panel (WHD): 19 x 1.75 x 16.7 inches
  • Overall depth front-rear support: 18.22 inches
• Weight: 17.1 lbs
• Finish: Black painted steel chassis with grey painted steel front with detachable grille
• Approvals: CE, ETL (ANSI/UL, CSA), PSE, RCM, BIS, CCC