Lab Gruppen FP 2400Q – Compact 4-Channel Touring Power Amplifier

The Lab Gruppen FP 2400Q is a high-efficiency 4-channel professional power amplifier engineered for compact touring systems, installation environments, and high-density monitor racks, delivering the legendary reliability and sonic performance that made the FP Series one of the most respected amplifier platforms in professional audio.

Designed by Lab Gruppen, the FP2400Q combines:

• Compact rack efficiency
• Clean multi-channel amplification
• Stable low-impedance operation
• Touring-grade protection systems
• High audio clarity with low distortion

Across Europe, the FP2400Q remains widely used in:

• Monitor systems
• Small-to-medium touring rigs
• Houses of worship
• Club installations
• Theater sound systems
• Distributed amplifier racks

Its popularity comes from delivering reliable 4-channel amplification in a lightweight 2U format, making it ideal for professional users who need multiple channels of clean power without excessive rack weight or heat generation.

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System Overview

Amplifier Type: 4-channel touring power amplifier
Amplifier Topology: Proprietary Class TD®

Rack Format: 2U rackmount

Primary Function:

• Powers compact loudspeaker systems
• Drives monitor wedges and distributed systems
• Supports multi-zone installations and touring applications

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Why the FP2400Q Is Still Highly Respected

In many professional sound systems, especially across Europe, amplifier racks must deliver:

• High channel density
• Reliable operation
• Efficient cooling
• Stable performance under continuous use

The FP2400Q became popular because it solved all of these requirements in one compact platform.

Unlike larger touring amplifiers focused purely on extreme subwoofer power, the FP2400Q is optimized for:

• Mid/high loudspeaker systems
• Stage monitors
• Compact line arrays
• Fill and delay systems
• Installation audio zones

This makes it one of the most versatile amplifiers in the FP Series.

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Power Output & Performance

The FP2400Q delivers consistent multi-channel amplification with excellent efficiency and low distortion.

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Output Power Specifications

Output Power Per Channel:

• 4 × 700 W @ 4 Ω
• 4 × 430 W @ 8 Ω

Bridged Operation:

• 2 × 1400 W @ 8 Ω bridged
• 2 × 860 W @ 16 Ω bridged

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Practical Power Advantage

This output configuration allows the FP2400Q to:

• Drive multiple monitor wedges simultaneously
• Power distributed speaker systems efficiently
• Handle compact touring arrays with ease

The amplifier delivers:

• Clean transient response
• High headroom under load
• Tight low-frequency control

even when operating continuously in demanding environments.

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Class TD® Amplifier Technology

One of the defining features of the FP2400Q is Lab Gruppen’s proprietary Class TD® amplifier topology.

This technology combines:

• The sonic transparency of Class AB amplification
• The efficiency advantages of Class D systems

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Practical Benefits of Class TD®

Compared to traditional analogue amplifiers:

• Lower heat generation
• Reduced power consumption
• Improved efficiency in touring racks
• Lower cooling requirements

Most importantly, the amplifier maintains:

• Fast transient response
• Clean midrange clarity
• Controlled low-frequency reproduction

This is why FP Series amplifiers became highly regarded in professional touring and installation environments.

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Audio Quality & Sonic Performance

The FP2400Q is designed to deliver clean, transparent sound reproduction with low distortion across all output channels.

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Performance Characteristics

Frequency Response:

• 20 Hz – 20 kHz

THD:

• Typically below 0.05%

Signal-to-Noise Ratio:

• Greater than 110 dB

Damping Factor:

• Greater than 500 (20 Hz – 200 Hz)

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Real-World Acoustic Behavior

In professional deployments:

• Vocals remain clean and detailed
• Monitor systems sound controlled and punchy
• Low frequencies stay tight without becoming muddy

Engineers appreciate the FP2400Q because it maintains:

• Clarity at high SPL
• Stable output across multiple channels
• Reliable sonic consistency during long events

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Stable Multi-Channel Operation

The FP2400Q is designed for professional environments where multiple loudspeakers are driven from a single amplifier.

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Operational Stability

• Stable down to 2 Ω per channel
• High-current power delivery
• Reliable operation under continuous load

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Practical Touring Advantage

This allows rental companies and touring engineers to:

• Reduce amplifier count in racks
• Simplify cabling
• Increase rack efficiency

while maintaining excellent system performance.

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Protection & Reliability

The FP2400Q includes comprehensive touring-grade protection systems designed to protect both the amplifier and connected loudspeakers.

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Integrated Protection Features

• Thermal protection
• Short-circuit protection
• Overload protection
• DC protection
• VHF protection

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Soft-Start Circuitry

The amplifier includes soft-start functionality to:

• Prevent inrush current damage
• Protect power distribution systems
• Improve long-term component reliability

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Startup Speaker Protection

Output relays delay speaker connection during startup to prevent:

• Pops
• Voltage surges
• Loudspeaker damage

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Cooling System & Rack Efficiency

The FP2400Q is optimized for high-density touring racks.

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Cooling Architecture

• Variable-speed cooling fans
• Front-to-rear airflow design
• Efficient thermal management

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Practical Rack Benefit

This allows:

• Better airflow in touring racks
• Reduced heat buildup
• More reliable long-duration operation

especially during:

• Festivals
• Theater productions
• Multi-day touring events

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Connectivity & Controls

The FP2400Q is designed for professional touring and installation integration.

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Inputs & Routing

Inputs:

• Balanced XLR inputs
• XLR loop-through outputs for signal distribution

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Outputs

• Neutrik SpeakON outputs
• Binding post outputs

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Front Panel Controls

• Detented gain controls for precise adjustment
• Per-channel status indicators

LED Indicators Include:

• Signal
• Clip
• Fault
• Protect status

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Remote Monitoring Compatibility

Depending on model version, the amplifier supports:

• Remote monitoring systems
• Centralized rack management

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Technical Specifications

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Typical Applications

The FP2400Q is commonly deployed in:

• Monitor amplifier racks
• Small-to-medium touring systems
• Club installations
• Houses of worship
• Theater sound systems
• Multi-zone distributed audio systems

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Typical Rack Configuration

• FP2400Q for monitors and fills
• Larger FP amplifiers for subwoofers
• External DSP or loudspeaker management processor

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Practical Result

• Compact high-density amplifier rack
• Reliable multi-channel power distribution
• Touring-grade operational stability

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Why Buy or Rent the FP2400Q in Europe?

For professional users across Europe, the FP2400Q remains attractive because it offers:

• Compact 4-channel efficiency
• Proven touring reliability
• Clean professional sound quality
• Excellent rack integration flexibility

It is especially valuable for:

• Rental companies
• Touring providers
• Theater integrators
• Club installers
• Corporate AV providers

who require reliable professional amplification in a compact format.

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System Advantages in Practice

Compact Design:
4 channels of amplification in lightweight 2U format.

Efficiency:
Class TD topology reduces heat and power consumption.

Clarity:
Clean sound reproduction with low distortion.

Flexibility:
Suitable for touring, installations, and monitor systems.

Reliability:
Built for demanding professional environments.

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Summary

The Lab Gruppen FP2400Q is a compact, high-efficiency 4-channel amplifier delivering reliable touring-grade performance, clean audio reproduction, and professional operational stability, making it a versatile solution for modern sound reinforcement systems.

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Bottom Line

For professional audio applications in Europe, the FP2400Q remains a trusted amplifier solution for touring, monitoring, and installation environments, offering the ideal balance between compact size, clean power delivery, and long-term reliability.