HA20K 4-Channel 20000W Class-D DJ Subwoofer Power Amplifier

The HA20K is a high-power 4-channel Class-D professional power amplifier designed for subwoofer-driven sound systems, touring PA applications, live events, and fixed installations. Delivering 4 × 2100W at 8Ω, 4 × 4000W at 4Ω, and 2 × 10000W bridged mono at 8Ω, it provides strong, stable output for demanding professional audio environments.

Built with a Class-D amplification stage, SMPS power supply, high-power MOSFET technology, and an advanced high-efficiency cooling system, the HA20K combines powerful output, compact internal structure, lightweight design, and long-term reliability.

Key Features

1. Powerful Class-D Amplification
The HA20K uses a high-efficiency Class-D amplification stage to deliver strong output power while reducing heat and energy consumption. It is ideal for high-performance subwoofer systems and large-scale sound reinforcement.

2. SMPS Power Supply
The built-in SMPS power supply provides stable power delivery, improved efficiency, and reliable performance under continuous high-load operation.

3. High-Efficiency Cooling System
An innovative cooling structure with fast heat dissipation helps the amplifier maintain stable operation during long working hours, even in demanding environments.

4. Compact, Efficient & Lightweight Design
With a compact internal circuit layout and high-efficiency components, the HA20K offers excellent power density while reducing overall system weight, making it suitable for both portable and installed audio systems.

5. Multiple Protection Functions
The amplifier is equipped with multiple protection systems, including soft start, second start, low-voltage protection, output overload protection, and short-circuit protection, ensuring reliable long-term operation.

Product Overview

The HA20K is designed to deliver real output performance for professional audio systems that require strong, stable power over extended periods of use. It is especially suitable for low-frequency sound reinforcement where subwoofers demand high current, strong headroom, and consistent output.

For large PA systems, subwoofers place the highest demand on amplification. The HA20K is built to support high-output subwoofer cabinets, continuous low-frequency operation, and multi-cabinet system configurations. Its four independent channels allow flexible power allocation, making it easier to build scalable and efficient bass systems.

Ideal Applications

The HA20K is suitable for a wide range of professional audio applications, including:

DJ sound systems
Subwoofer-driven PA systems
Touring sound systems
Live event production
Outdoor concerts
Nightclubs and entertainment venues
Fixed installations
Large performance venues
Multi-cabinet bass reinforcement systems

Flexible System Configuration

With four independent channels, the HA20K can be used in different system setups, including:

Subwoofer-only amplification
Subwoofer + full-range speaker combinations
Multi-channel PA distribution
Multi-cabinet system expansion
Bridged mono high-power output applications

This flexibility helps system designers achieve better sound balance, stronger low-frequency performance, and more efficient use of equipment.

Stable Performance for Demanding Use

Reliability is essential in live sound and professional installation environments. The HA20K is designed to maintain stable performance under heavy load and long operating hours. Its advanced protection system, efficient cooling design, and robust internal structure make it a dependable choice for professional audio engineers, rental companies, system integrators, and venue installations.

Why Choose the HA20K?

High output power for professional subwoofer systems
4-channel design for flexible system configuration
Class-D efficiency with reduced heat and power consumption
SMPS power supply for stable performance
High-efficiency cooling system for long-term operation
Compact and lightweight structure for easy rack installation
Multiple protection functions for safe and reliable use
Ideal for touring, events, clubs, and fixed installations

Specifications