ASHLY KLR-4000 Power Amplifier 2 x (2, 000W @ 2) (1, 400W @ 4) (850W @ 8) Ohms

Product Overview

The Ashly KLR-4000 is a high-power 2-channel Class-H commercial amplifier delivering 2,000W per channel at 2 ohms, 1,400W at 4 ohms, and 850W at 8 ohms, with a 4,000W bridged mono rating at 4 ohms. As the second-highest model in the Ashly KLR high-performance amplifier series, the KLR-4000 is designed for demanding installed sound and live sound applications including line arrays and dual-18 subwoofer configurations where sustained high output is required. The KLR-4000 combines high power output with a signal-to-noise ratio exceeding 110 dB in a lightweight 2U rack-mount enclosure.

Product Description

The Ashly KLR-4000 uses a 2-step Class-H output topology and a switch-mode power supply to maintain efficiency at high continuous power output. The SNR rating of greater than 110 dB ensures a low background noise floor. Balanced inputs accept combo XLR/TRS connectors and 3-pin Euroblock terminations for both touring and installation wiring. Neutrik speakON output connectors provide secure locking load connections. Front-panel controls include per-channel attenuators, a 3-position gain switch, a 3-position mode switch for stereo, bridged mono, or parallel mono operation, and a 3-position 12 dB/octave high-pass filter switchable between 30 Hz, 50 Hz, and off. An on/off limiter switch provides additional output protection. Cooling is front-to-rear forced air with removable, cleanable dust filters. Front handles are removable for clean permanent rack installation appearance. The optional KLR-LK2 locking knobs prevent unauthorized front-panel adjustments in secure installations. The KLR-4000 is TAA compliant and carries cCSAus, CE, FCC, and RoHS certifications.

Key Features

• 2-Step Class-H Output Topology — Efficient power delivery at high output levels, reducing heat and operating costs.
• 2,000W Per Channel at 2 Ohms — Handles line arrays and dual-18 subwoofer loads at sustained power levels.
• 4,000W Bridged Mono at 4 Ohms — Single-amplifier bridged mono for high-output mono applications.
• SNR >110 dB — Low noise floor for installed sound applications in controlled acoustic environments.
• 3-Position Mode Switch — Stereo, bridged mono, or parallel mono operation without rewiring.
• 3-Position 12 dB/Oct High-Pass Filter — Switchable 30 Hz, 50 Hz, or off for speaker protection.
• Combo XLR/TRS + Euroblock Inputs — Accommodates professional and installation wiring standards.
• Neutrik speakON Output Connectors — Locking connectors for secure permanent and touring connections.
• Forced-Air Cooling with Removable Filters — Front-to-rear airflow with cleanable dust filters.
• Removable Front Handles — Clean rack panel appearance in permanent installations.
• TAA Compliant — Meets Trade Agreements Act requirements for government and institutional procurement.
• cCSAus, CE, FCC, RoHS Certified — Full compliance for North American and international deployments.

Typical Applications

• Auditorium
• House of worship
• Multi-purpose room
• All-hands room
• Commercial meeting space

Technical Specifications

Frequently Asked Questions

What is the bridged mono output of the KLR-4000?

The KLR-4000 delivers 4,000W bridged mono into a 4-ohm load, suitable for high-output single-channel applications such as dedicated subwoofer amplification or high-power main speaker feeds.

How does the KLR-4000 differ from the KLR-5000?

The KLR-4000 delivers 2,000W per channel at 2 ohms versus 2,500W for the KLR-5000, and 4,000W bridged versus 5,000W. Both use a 2-step Class-H output topology and the same 2U enclosure with identical features.

Does the KLR-4000 support 70V constant-voltage operation?

No. For 70V constant-voltage operation within the KLR series, the KLR-3200 is the correct model with 800W at 70V per channel.

Is the KLR-4000 suitable for permanent commercial AV installation?

Yes. Front handles are removable for flush rack panel appearance, optional locking knobs (KLR-LK2) prevent unauthorized front-panel adjustments, and the amplifier is TAA compliant for institutional and government procurement.

What certifications does the KLR-4000 hold?

The KLR-4000 is certified cCSAus, CE, FCC, and RoHS, and is TAA compliant for North American and international commercial deployments including government facilities.