HA20KQ 20000W 4-Channel Class D DSP Subwoofer Power Amplifier with Ethernet Control
Short Description
The HA20KQ is a professional 4-channel Class D DSP subwoofer power amplifier designed for high-output bass systems, touring PA, live events, clubs, stadiums, and fixed installations. With 4 × 2100W @ 8Ω, 4 × 4000W @ 4Ω, full 4-in / 4-out DSP processing, and flexible control via Ethernet, RS485, and USB, it delivers powerful low-frequency performance with precise digital control and reliable long-term operation.
Key Features
- High Power Output
4 × 2100W @ 8Ω, 4 × 4000W @ 4Ω, and 2 × 10000W bridged mono @ 8Ω. - Efficient Class D Amplification
Compact Class D design provides high efficiency, strong output, reduced heat, and lightweight rack integration. - Full DSP Processing
Built-in DSP supports Mute, Polarity, Gain, EQ, Crossover, Limiter, and Delay functions. - 4 In / 4 Out Digital Processing
Flexible input and output routing makes system configuration easier for professional PA applications. - Ethernet / RS485 / USB Control
Multiple amplifiers can be connected and managed through one computer for easier system setup and monitoring. - Advanced Cooling System
Innovative high-efficiency cooling design provides fast heat dissipation and stable performance under heavy load. - Wide Voltage Version
110V version: 65V–135V
220V version: 185V–265V - Reliable Protection System
Built-in protection includes soft start, low-voltage protection, output overload protection, short-circuit protection, and thermal protection. - Compact and Lightweight Structure
High power output in a compact rack-mount design, suitable for both touring systems and fixed installations.
Product Overview
The HA20KQ 4-Channel Class D DSP Subwoofer Power Amplifier is an advanced professional amplifier developed by Haozhiseng Audio for demanding sound reinforcement applications. It combines a reliable power supply, compact Class D amplification circuit, powerful DSP processing, and a high-efficiency cooling system in one integrated unit.
The HA20KQ is designed to deliver strong, stable, and controlled low-frequency output, making it ideal for professional subwoofer systems that require high power, accurate tuning, and long-term reliability.
With 4 input and 4 output digital processing, the amplifier allows users to configure, store, and recall up to 20 user presets, making setup faster and more convenient for different venues, systems, and events.
The built-in DSP includes crossover, parametric EQ, limiter, polarity, gain control, mute, and delay functions. This helps reduce the need for external loudspeaker processors while giving system engineers better control directly from the amplifier.
Application Scenarios
Subwoofer Systems / Low-Frequency Reinforcement
Perfect for driving large subwoofer cabinets in mobile PA systems, outdoor concerts, stadiums, and events where deep bass throw and strong low-frequency energy are critical.
Fixed Installations in Arenas & Large Halls
Ideal for venues that require high output at low frequencies, including performance theaters, concert halls, auditoriums, large halls, and multi-purpose venues.
Festivals & Outdoor Events
The high power output, rugged design, and stable operation make the HA20KQ suitable for road cases, festival PA stacks, touring systems, and large-scale outdoor sound reinforcement.
Club Systems & Nightlife Venues
Provides solid and powerful bottom-end performance for club subwoofer systems. DSP presets and network control make tuning and system management easier.
Worship Centers & Corporate Sound Installations
Suitable for large worship centers, conference venues, and corporate installations where strong bass reinforcement and clean DSP control are required.
Why Choose The HA20KQ
If you need pure, powerful bass performance combined with digital control and network management, the HA20KQ is an ideal solution.
It integrates amplifier, DSP processing, protection, cooling, and network control into one high-power unit. This helps reduce external equipment, simplify system wiring, improve reliability, and provide greater flexibility for professional audio engineers.
Designed for professionals who demand power, precision, efficiency, and stability, the HA20KQ delivers strong low-frequency performance for live sound, touring systems, clubs, festivals, large venues, and fixed installations.
Key Advantages
Powerful Bass Performance
The HA20KQ is designed to drive high-output subwoofer cabinets with strong, deep, and controlled bass response.
Advanced DSP Control
Built-in DSP allows precise adjustment of EQ, crossover, limiter, delay, gain, mute, and polarity for better system tuning.
Network Management
Ethernet, RS485, and USB control make it easy to manage multiple amplifiers from one computer, especially in large PA systems.
Stable Operation Under Heavy Load
The advanced cooling system and protection circuit help maintain reliable performance during long-time, high-power operation.
Easy Rack Integration
The compact design saves rack space and reduces overall system weight, making it suitable for touring racks and fixed installation systems.
DSP Specifications
| Item | Specification |
|---|---|
| Model | HA20KQ |
| Input | 4 Channels |
| Output | 4 Channels |
| PC Control Port | 1 USB port on front panel, 1 USB port on rear panel, 2 RS485 ports on rear panel |
| Processor | 48kHz sampling frequency, 48-bit fixed-point DSP, 24-bit A/D and D/A converter |
| Dynamic Range | >110dB |
| Frequency Response | ±0.25dB, 20Hz–20kHz |
| Distortion | <0.01%, 20Hz–20kHz @ +10dBu balanced input |
| Signal-to-Noise Ratio | >110dB |
| Crossover Filter | Each output channel can be independently set as LPF, HPF, and APF |
| Filter Types | Butterworth, Bessel, Linkwitz-Riley |
| Crossover Frequency | 20Hz–20kHz |
| Slope | 12, 18, 24, or 48 dB/octave |
| EQ Bandwidth | 0.2 to 36 octaves |
| EQ Frequency | 20Hz–20kHz |
| EQ Gain | -24dB to +12dB, 0.2dB steps |
| Delay | 0ms to 115ms |
| Display | 2 × 20 LCD |
| Preset Storage | 20 user presets |
Amplifier Specifications
| Item | Specification |
|---|---|
| Model | HA20KQ |
| 8Ω Stereo Power | 4 × 2100W |
| 4Ω Stereo Power | 4 × 4000W |
| 8Ω Bridged Mono Power | 2 × 10000W |
| Frequency Response | 20Hz–20kHz ±0.5dB |
| THD+N | 0.10% |
| Signal-to-Noise Ratio | 110dB |
| Input Impedance | 20kΩ Balanced / 10kΩ Unbalanced |
| Output Connectors | Speakon Connectors |
| Power Requirement | 100–120V 50–60Hz or 200–240V 50–60Hz |
| Voltage Version | 110V: 65V–135V / 220V: 185V–265V |
| Dimensions | 483 × 377 × 88mm |
| Net Weight | 13kg |
Final Product Description
The HA20KQ is a high-power 4-channel Class D DSP subwoofer amplifier built for professional audio systems that require strong bass output, precise digital control, and stable long-term performance. With powerful output capability, full DSP processing, Ethernet / RS485 / USB control, and an advanced cooling system, it is an excellent choice for touring sound, outdoor festivals, club systems, stadiums, worship centers, large venues, and fixed installations.
