Ashly KLR-4000 | 850W Stereo Power Amplifier with 2-Tier Class-H Design

ASHLY KLR 4000  (Ashly KLR4000E-120V-U)

Powerful Stereo Amplifier for High-Output Audio Systems

The Ashly KLR-4000 is a professional-quality stereo power amplifier designed to deliver outstanding performance for high-demand audio applications. With its 850W per channel at 8 ohms stereo output, versatile connectivity, and durable 2-tier Class-H circuitry, the KLR-4000 offers superior efficiency and audio clarity. Its lightweight and efficient design is complemented by a robust feature set, making it an excellent choice for audio professionals.

Ashly KLR-4000 Competitive Differences

• 850W per channel at 8 ohms stereo, up to 4000W in bridged mode
• 2-tier Class-H circuitry for optimized power efficiency and reduced heat
• Switchable stereo, bridged, and parallel modes for versatile system configurations
• Euroblock and combo XLR/TRS inputs with Neutrik Speakon outputs for seamless connectivity
• 30Hz and 50Hz high-pass filters to reduce low-frequency rumble
• Switchable limiter to prevent audio distortion
• Front-panel level controls and LED indicators for easy monitoring
• Forced air cooling with variable-speed fans and removable dust filters
• Integrated protection circuitry for overcurrent, DC output, and overheating

Ashly KLR-4000 Description

The Ashly KLR-4000 offers unparalleled performance and flexibility in a compact 2RU design. Capable of delivering 850W per channel at 8 ohms stereo and up to 4000W in bridged mono mode, this amplifier is optimized for sustained power output in demanding professional audio environments. The 2-tier Class-H design enhances efficiency, while the switch mode power supply provides consistent audio fidelity across deep bass, punchy midrange, and clear treble. The amplifier's front-panel controls, high-pass filters, and switchable limiter provide precise sound control, while the rugged forced-air cooling system ensures reliable operation. Designed for versatility, the KLR-4000’s input/output connectivity supports a wide range of professional audio setups. Whether for live sound, installations, or portable rigs, the KLR-4000 delivers consistent performance with advanced protection features.

KLR-4000 Features

• Power output:
  • 850W per channel @ 8 ohms stereo
  • 1400W per channel @ 4 ohms stereo
  • 2000W per channel @ 2 ohms stereo
  • 4000W @ 4 ohms bridged mono
• 2-tier Class-H circuitry for high efficiency
• Inputs: 2 x Euroblock, 2 x XLR/TRS combo
• Outputs: 2 x Neutrik Speakon
• Front-panel controls for levels, gain, and high-pass filters
• LED indicators for output level, clip/protect, and power
• Switchable limiter to prevent distortion
• Forced air cooling with removable dust filters
• Integrated protection circuitry for overcurrent, DC output, and overheating
• 2RU rackmount design

KLR-4000 Specifications

• Frequency Response: 20Hz to 20kHz (+0.3dB)
• Damping Factor: >380 at 8 ohms
• Signal-to-Noise Ratio: >109dB
• Total Harmonic Distortion (THD): <0.05%
• Operating Temperature: 22 to 72°F (-10 to 40°C)
• Dimensions: 19.0 x 3.5 x 16.0" (48.3 x 8.9 x 40.6 cm)
• Weight: 26.7 lbs (12.1 kg)
• Package Weight: 33.7 lbs
• Box Dimensions: 19 x 16 x 4"