HA7K 2-Channel Class TD Power Amplifier — 7000W for Professional PA Systems
The Haozhiseng Audio HA7K is a 2-channel Class TD power amplifier designed for professional PA systems, subwoofers, and full-range loudspeakers. Delivering 2 × 1450W at 8Ω, 2 × 2800W at 4Ω, or 2 × 3500W at 2Ω, it provides flexible output options for live sound, rental systems, and fixed installations.
A pure copper heat sink supports efficient heat dissipation, while integrated protection helps safeguard the amplifier against electrical faults. Its 2U rackmount chassis and 13 kg net weight make it practical for both portable amplifier racks and permanent installations.
The 7000W rating refers to the combined output of both channels at 2Ω, or bridged output at 4Ω.
Key Features
- Two-channel Class TD amplification for professional sound reinforcement.
- Flexible RMS output: 2 × 1450W at 8Ω, 2 × 2800W at 4Ω, and 2 × 3500W at 2Ω.
- Bridged output: 5600W at 8Ω or 7000W at 4Ω.
- Pure copper heat sink for effective heat dissipation.
- High-quality output transistors for professional amplification.
- Low distortion: THD below 0.1% at 1W across 20 Hz–20 kHz.
- Signal-to-noise ratio above 112 dBA for a low noise floor.
- Selectable voltage gain from 23 dB to 44 dB.
- Balanced XLR inputs with binding-post and speakON speaker outputs.
- Compact 2U enclosure for standard professional audio racks.
Flexible Power for PA Systems and Subwoofers
The HA7K supports a range of loudspeaker loads, allowing system designers to select the output configuration that matches their application.
| Output Configuration | RMS Power |
|---|---|
| Stereo, 8Ω per channel | 2 × 1450W |
| Stereo, 4Ω per channel | 2 × 2800W |
| Stereo, 2Ω per channel | 2 × 3500W |
| Bridged mono, 8Ω | 5600W |
| Bridged mono, 4Ω | 7000W |
Use independent channels for separate loudspeaker circuits, or bridged operation for a compatible higher-power load. Speaker impedance, wiring, and operating mode should follow the amplifier’s installation instructions.
Clear Audio and Adjustable Gain
With a 20 Hz–34 kHz frequency response (+0/−0.3 dB at 1W into 8Ω), the HA7K supports both full-range reproduction and subwoofer amplification when used with appropriate external crossover processing.
Channel separation above 70 dB at 1 kHz helps minimize crosstalk. Eight selectable gain settings and independent front-panel level controls allow the amplifier to be matched to the system’s signal levels.
Copper Heat Sink and Integrated Protection
The HA7K uses a 100% pure copper heat sink to transfer heat away from the output components. Its protection system covers short circuits, DC voltage, turn-on/off transients, and current inrush, helping manage abnormal electrical conditions.
The rackmount enclosure provides a practical format for touring racks, rental inventories, and installed audio systems.
Voltage Versions
Choose the power-supply version that matches your installation requirements:
| Version | Operating Voltage |
|---|---|
| 110V version | 65–135V AC |
| 220V version | 130–265V AC |
| Worldwide wide-voltage version | 65–265V AC |
Specify the required voltage version when ordering.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HA7K |
| Brand | Haozhiseng Audio |
| Product Type | Professional Power Amplifier |
| Number of Channels | 2 |
| Amplifier Class | Class TD |
| RMS Output at 8Ω | 2 × 1450W |
| RMS Output at 4Ω | 2 × 2800W |
| RMS Output at 2Ω | 2 × 3500W |
| RMS Bridged Output at 8Ω | 5600W |
| RMS Bridged Output at 4Ω | 7000W |
| Frequency Response | 20 Hz–34 kHz (+0/−0.3 dB, 1W into 8Ω) |
| THD | <0.1% at 1W, 20 Hz–20 kHz |
| Signal-to-Noise Ratio | >112 dBA |
| Channel Separation | >70 dB at 1 kHz |
| Input Connectors | Balanced 3-pin XLR, per channel |
| Output Connectors | Binding posts and speakON |
| Input Impedance | 20 kΩ |
| Selectable Voltage Gain | 23, 26, 29, 32, 35, 38, 41, or 44 dB |
| Level Adjustment | Independent front-panel 31-position detented controls, −∞ to 0 dB |
| Heat Sink | 100% Pure Copper |
| Protection | Short Circuit, DC Voltage, Turn-On/Off Transients, Current Inrush |
| Operating Voltage — 110V Version | 65–135V AC |
| Operating Voltage — 220V Version | 130–265V 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 PA systems
- Rental and mobile event production
- Nightclubs and entertainment venues
- Churches and worship halls
- Theatres and auditoriums
- Sports venues and fixed sound installations
Why Choose the HA7K?
The Haozhiseng Audio HA7K combines flexible two-channel output, Class TD amplification, and practical system controls in a compact 2U chassis. Its stereo and bridged power options accommodate different loudspeaker configurations, while low distortion and selectable gain support straightforward integration into professional audio systems.
With copper heat dissipation, balanced inputs, and integrated electrical protection, the HA7K is a practical amplifier choice for installers, rental companies, and live sound professionals.
Contact Haozhiseng Audio for pricing, system configuration support, and OEM/ODM inquiries.
Website: www.hzsaudio.com
