The Ashly KLR-4000 is a high-output 2-channel professional power amplifier designed for demanding sound reinforcement applications including subwoofers, line arrays, full-range loudspeaker systems, and installed audio systems.
The KLR-4000 delivers 2,000 watts per channel at 2 ohms, 1,400 watts per channel at 4 ohms, or 850 watts per channel at 8 ohms. For applications requiring a single high-power channel, the amplifier can provide 4,000 watts bridged into 4 ohms.
A 2RU rackmount chassis, 2-ohm operation, selectable stereo/parallel/bridged modes, adjustable gain settings, selectable high-pass filtering, balanced inputs, speakON outputs, and forced-air cooling make the KLR-4000 suitable for both portable sound systems and permanent installations.
High-Output 2-Channel Amplification
The Ashly KLR-4000 is designed for applications requiring substantial continuous amplifier output.
Power ratings include:
- 2 × 2,000W at 2Ω
- 2 × 1,400W at 4Ω
- 2 × 850W at 8Ω
- 4,000W bridged at 4Ω
Its ability to operate with 2-ohm loads provides additional system-design flexibility when powering compatible loudspeaker configurations.
Stereo, Parallel and Bridged Operation
A three-position operating-mode switch allows the KLR-4000 to be configured for:
- Stereo
- Parallel Mono
- Bridged Mono
Stereo mode provides two independent amplifier channels, while bridged operation combines the amplifier channels for applications requiring a single higher-powered output.
Selectable Gain
A three-position gain switch provides additional flexibility when integrating the KLR-4000 with mixers, DSPs, system processors, and other professional audio equipment.
Independent front-panel attenuators provide convenient level adjustment for each amplifier channel.
Selectable High-Pass Filter
The KLR-4000 includes a three-position 12 dB/octave high-pass filter with:
This allows unwanted low-frequency content to be reduced when appropriate for the connected loudspeakers and system design.
Professional Audio Connections
Balanced input connections provide compatibility with professional audio sources and processing equipment.
The KLR-4000 includes:
- Combo XLR/TRS inputs
- 3-pin Euroblock inputs
- Neutrik speakON speaker connections
These connection options make the amplifier suitable for both portable systems and permanent installations.
Class-H Amplifier Design
The KLR-4000 uses a 2-step Class-H output topology designed to provide high output power while improving operating efficiency compared with conventional linear amplifier designs.
A switch-mode power supply helps reduce chassis size and weight while supporting the amplifier's high-output capability.
Forced-Air Cooling and Protection
Front-to-rear forced-air cooling helps manage amplifier temperature during extended operation.
Removable dust filters simplify routine maintenance, while built-in protection circuitry helps protect the amplifier and connected system during abnormal operating conditions.
Ashly KLR-4000 Key Features
- 2-channel professional power amplifier
- 2,000W per channel at 2Ω
- 1,400W per channel at 4Ω
- 850W per channel at 8Ω
- 4,000W bridged at 4Ω
- Stable operation down to 2Ω
- 2RU rackmount chassis
- 2-step Class-H output design
- Switch-mode power supply
- Stereo, parallel mono and bridged operating modes
- Three-position gain selection
- 30 Hz / 50 Hz / Off high-pass filter
- 12 dB/octave high-pass filter slope
- Balanced XLR/TRS combo inputs
- 3-pin Euroblock inputs
- Neutrik speakON speaker connections
- Front-panel channel attenuators
- Front-to-rear forced-air cooling
- Removable dust filters
- Removable amplifier handles
- Optional locking front-panel volume knobs
- Protection circuitry
- cCSAus, CE, FCC and RoHS compliance
Ashly KLR-4000 Power Ratings
| Operating Mode / Load | Output Power |
|---|
| Stereo – 2Ω | 2 × 2,000W |
| Stereo – 4Ω | 2 × 1,400W |
| Stereo – 8Ω | 2 × 850W |
| Bridged Mono – 4Ω | 4,000W |
Typical Applications
- High-output sound reinforcement systems
- Subwoofer systems
- Dual 18-inch subwoofers
- Line arrays
- Full-range loudspeaker systems
- Live performance systems
- Clubs and entertainment venues
- Houses of worship
- Auditoriums
- Theaters
- Portable PA systems
- Permanent sound installations
Why Choose the Ashly KLR-4000?
The Ashly KLR-4000 combines high-output two-channel amplification, 2-ohm operation, 4,000-watt bridged capability, selectable operating modes, high-pass filtering, and professional audio connections in a 2RU chassis.
For systems requiring substantial amplifier power for compatible subwoofers, line arrays, or full-range loudspeakers, the KLR-4000 provides flexible load and operating-mode options for professional sound reinforcement.
Why Buy the Ashly KLR-4000 from Audio Supply?
Audio Supply provides Ashly amplifiers, signal processors, mixers, commercial audio equipment, and professional sound system components.
Our team can help you select amplification and related equipment based on loudspeaker impedance, power requirements, system configuration, and application.
