HA9K 9000W 2-Channel Class TD Power Amplifier for Professional Audio Systems
The Haozhiseng Audio HA9K is a 2-channel Class TD power amplifier designed for professional subwoofers and full-range loudspeaker systems. Delivering 2 × 1600W at 8Ω, 2 × 3000W at 4Ω, and 2 × 4500W at 2Ω, it provides flexible amplification for live sound, rental systems, entertainment venues, and fixed installations.
A high-efficiency switch-mode power supply supports high power output in a compact 2U rackmount chassis. Selectable voltage gain, independently adjustable peak output voltage, and individual channel level controls help integrate the HA9K into different loudspeaker configurations.
Key Features
- High-power, 2-channel output: Up to 9000W combined RMS output at 2Ω.
- Class TD amplification: Designed for efficient power delivery and low-distortion audio reproduction.
- Switch-mode power supply: Supports a compact, high-power amplifier design.
- Flexible operating configurations: Stereo output into 8Ω, 4Ω, or 2Ω loads, plus bridged mono operation.
- Selectable voltage gain: Eight settings from 23 dB to 44 dB.
- Adjustable peak output voltage: Independent channel settings help match output limits to the loudspeaker system.
- Professional connections: Balanced XLR inputs, binding posts, and speakON outputs.
- Integrated protection: Includes short-circuit, DC voltage, turn-on/off transient, and current-inrush protection.
- Compact 2U construction: A 13 kg net weight supports portable racks and permanent installations.
Output Power
The HA9K offers multiple output configurations for compatible loudspeaker loads.
| Operating Configuration | RMS Output Power |
|---|---|
| Stereo, 8Ω per channel | 2 × 1600W |
| Stereo, 4Ω per channel | 2 × 3000W |
| Stereo, 2Ω per channel | 2 × 4500W |
| Bridged Mono, 8Ω | 6000W |
| Bridged Mono, 4Ω | 9000W |
The 9000W rating refers to the combined output of both channels at 2Ω or the bridged mono output at 4Ω. Configure operating modes and speaker wiring according to the amplifier’s instructions.
Class TD Amplification for Professional Sound
The HA9K combines Class TD output circuitry with a switch-mode power supply to support demanding sound reinforcement applications.
Its 20 Hz–34 kHz frequency response (+0/−0.3 dB at 1W into 8Ω) supports wide-band audio reproduction. THD+N below 0.1% at 1 kHz, a signal-to-noise ratio above 112 dBA, and channel separation above 70 dB at 1 kHz help maintain clear audio with low noise and limited crosstalk.
Use the HA9K for compatible subwoofer systems or full-range loudspeakers, with external processing configured for the application.
Flexible Gain and Output Control
Selectable voltage gain settings of 23, 26, 29, 32, 35, 38, 41, and 44 dB allow the amplifier to accommodate different system gain structures.
Each channel includes a 31-position detented front-panel level control, adjustable from −∞ to 0 dB. Independent peak output voltage adjustment provides additional control when configuring the amplifier for different loudspeaker requirements.
Cooling and Protection
Cooling fans help manage operating temperatures, while integrated protection addresses short circuits, DC voltage, turn-on/off transients, and current inrush.
These functions support dependable system operation alongside appropriate loudspeaker matching, ventilation, and amplifier configuration.
Voltage Options
The HA9K is available in different power-supply versions:
- 110V version: 65–135V AC
- 220V version: 135–265V AC
- Worldwide wide-voltage version: 65–265V AC
Specify the required version when ordering. The operating range depends on the selected power-supply configuration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HA9K |
| Brand | Haozhiseng Audio |
| Product Type | Professional Power Amplifier |
| Number of Channels | 2 |
| Amplifier Class | Class TD |
| Stereo Output at 8Ω | 2 × 1600W RMS |
| Stereo Output at 4Ω | 2 × 3000W RMS |
| Stereo Output at 2Ω | 2 × 4500W RMS |
| Bridged Mono Output at 8Ω | 6000W RMS |
| Bridged Mono Output at 4Ω | 9000W RMS |
| Frequency Response | 20 Hz–34 kHz (+0/−0.3 dB, 1W/8Ω) |
| THD+N | <0.1% at 1 kHz |
| Signal-to-Noise Ratio | >112 dBA |
| Channel Separation | >70 dB at 1 kHz |
| Input Connectors | Balanced 3-pin XLR per channel |
| Output Connectors | 2-pole binding posts and speakON |
| Voltage Gain | 23, 26, 29, 32, 35, 38, 41, or 44 dB selectable |
| Input Impedance | 20 kΩ |
| Channel Level Adjustment | Front-panel, 31-position detented potentiometer, −∞ to 0 dB |
| Peak Output Voltage | Independently adjustable per channel |
| Power Supply | High-efficiency switch-mode power supply |
| Protection | Short circuit, DC voltage, turn-on/off transients, current inrush |
| Operating Voltage — 110V Version | 65–135V AC |
| Operating Voltage — 220V Version | 135–265V AC |
| Operating Voltage — Worldwide Version | 65–265V AC |
| Rack Height | 2U |
| Dimensions (W × H × D) | 483 × 88 × 396 mm |
| Packing Dimensions | 580 × 180 × 560 mm |
| Net Weight | 13 kg |
| Gross Weight | 18 kg |
Applications
- Live concerts and touring sound systems
- Professional subwoofer and full-range amplification
- Rental audio systems
- Theaters and performance venues
- Nightclubs and entertainment centers
- Corporate events and conference venues
- Churches and worship centers
- Fixed professional audio installations
Why Choose the HA9K?
The Haozhiseng Audio HA9K combines high-output amplification, flexible gain settings, and professional connectivity in a compact 2U chassis.
With stereo and bridged output options, independent channel controls, and integrated protection, it provides a practical amplification solution for audio professionals building portable or installed loudspeaker systems.
Contact Haozhiseng Audio for pricing, voltage-version availability, system configuration support, and OEM/ODM inquiries.
Website: www.hzsaudio.com
