HA32K4 PRO 26,800W 4-Channel Class-D Power Amplifier with PFC for Professional Subwoofers
The Haozhiseng Audio HA32K4 PRO is a high-power, 4-channel Class-D amplifier designed for professional subwoofers, passive PA systems, and touring sound applications. Delivering 4 × 3200W at 8Ω, 4 × 5200W at 4Ω, and 4 × 6700W at 2Ω, it offers flexible amplification for demanding sound reinforcement systems.
Featuring SiC MOSFET technology and a 90–265V AC power supply with Power Factor Correction (PFC), the HA32K4 PRO combines efficient amplification with wide-voltage operation. Its front-panel display shows operating modes and internal temperature, while individual channel controls and status indicators make system monitoring convenient.
Key Features
- Four channels of high-power amplification: Supports professional subwoofer and PA configurations.
- Up to 26,800W combined rated output at 2Ω: 4 × 6700W for compatible loudspeaker loads.
- SiC MOSFET technology: Supports efficient switching and high power density.
- 90–265V AC power supply with PFC: Accommodates different mains voltages within the specified operating range.
- 2.7Ω load capability: Provides additional flexibility for compatible loudspeaker configurations.
- Front-panel status display: Shows amplifier temperature and channel operating modes.
- Selectable gain: 32, 35, 38, or 41 dB.
- Professional connections: Balanced XLR inputs and Neutrik speakON outputs.
- Tunnel cooling system: Directs airflow through the amplifier to help manage operating temperatures.
- Integrated protection: Undervoltage, DC, overtemperature, overload limiting, and short-circuit protection.
Flexible Power for Subwoofer and PA Systems
The HA32K4 PRO offers four amplification channels for powering compatible subwoofers, full-range loudspeakers, and passive line array systems. Stereo and bridged output configurations allow system designers to match amplifier output to different loudspeaker requirements.
| Output Configuration | Rated Output Power |
|---|---|
| 8Ω per channel | 4 × 3200W RMS |
| 4Ω per channel | 4 × 5200W RMS |
| 2Ω per channel | 4 × 6700W RMS |
| 8Ω bridged | 2 × 10,200W RMS |
| 4Ω bridged | 2 × 13,200W RMS |
The 26,800W figure represents the combined rated output of four channels at 2Ω. Select the operating mode and loudspeaker load according to the amplifier’s installation and wiring instructions.
SiC MOSFET Technology and PFC Power Supply
The Class-D output stage uses SiC MOSFET technology to support efficient high-power amplification. A PFC-equipped power supply operates across 90–265V AC, providing flexibility for installations and touring systems used in different regions.
Together, these features support high power density in a compact rackmount enclosure.
Convenient Front-Panel Monitoring
The front-panel display provides a clear view of the amplifier’s operating modes and internal temperature. Stereo, mono, and bridge mode information helps users check the current system configuration.
Each channel also includes signal and status indicators for monitoring input activity, output level, clipping, and protection conditions. Four level controls provide direct access to channel adjustments.
Cooling and System Protection
A tunnel cooling system helps move air through the chassis and dissipate heat from internal components. Built-in protection functions monitor abnormal operating conditions, including undervoltage, DC faults, excessive temperature, overload, and short circuits.
These features help protect the amplifier during professional use while keeping operating status visible to the user.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HA32K4 PRO |
| Brand | Haozhiseng Audio |
| Product Type | 4-Channel Professional Power Amplifier |
| Amplifier Class | Class D |
| Switching Technology | SiC MOSFET |
| Number of Channels | 4 |
| Output Power at 8Ω | 4 × 3200W RMS |
| Output Power at 4Ω | 4 × 5200W RMS |
| Output Power at 2Ω | 4 × 6700W RMS |
| Bridged Output Power at 8Ω | 2 × 10,200W RMS |
| Bridged Output Power at 4Ω | 2 × 13,200W RMS |
| Frequency Response | 20 Hz–20 kHz, ±0.5 dB, at 1W into 8Ω |
| Total Harmonic Distortion | <0.5% from 1W to full power; typical value <0.05% |
| Signal-to-Noise Ratio | >110 dBA, 20 Hz–20 kHz, A-weighted; specified at 8Ω, 1 kHz, 1V sensitivity |
| Selectable Voltage Gain | 32 / 35 / 38 / 41 dB |
| Channel Separation | >66 dB at 1 kHz, below rated power |
| Slew Rate | 50 V/μs at 8Ω |
| Maximum Output Voltage / Current | 185V / 85A |
| Maximum Bridged Output Voltage | 370V |
| Standby Power / Current | 47W / 0.8A |
| Operating Ambient Temperature | 0–45°C / 32–113°F |
| Input Signal Indicator | One green LED per channel; input signal threshold ≥−40 dB |
| Output Level Indicators | Four green LEDs per channel: −20, −10, −5, and −3 dB |
| Status Indicator | One dual-color yellow/red LED per channel for protection, clipping, overheating, and overload indication |
| Front-Panel Display | Operating mode and internal temperature |
| Displayed Operating Modes | Mono, Bridge, and Stereo |
| Overtemperature Protection Threshold | Above 75°C internal temperature |
| Cooling System | Tunnel airflow cooling |
| Input Connectors | 3-pin XLR, electronically balanced, per channel |
| Output Connectors | Neutrik speakON |
| Protection | Undervoltage, DC, Overtemperature, Overload Limiter, Short Circuit |
| Operating Voltage | 90–265V AC |
| Power Factor Correction | PFC |
| Input Impedance | 10 kΩ, balanced |
| Damping Factor | ≥5000 |
| Dimensions (W × H × D) | 490 × 50 × 482 mm |
| Packing Dimensions | 610 × 560 × 103 mm |
| Net Weight | 12.5 kg |
| Gross Weight | 16.5 kg |
Applications
- Professional subwoofer systems
- Concert and festival sound reinforcement
- Touring PA and rental systems
- Passive line array systems
- Nightclubs and entertainment venues
- Theatres, auditoriums, and worship venues
- Permanent professional audio installations
Why Choose the HA32K4 PRO?
The HA32K4 PRO combines four-channel output flexibility, SiC MOSFET technology, and a wide-voltage PFC power supply in a compact rackmount design. Its front-panel monitoring, selectable gain, professional connections, and integrated protection make it a practical amplifier for rental companies, touring professionals, and system integrators.
For installations requiring substantial subwoofer power or multiple amplification channels, the HA32K4 PRO offers a versatile foundation for a professionally configured sound system.
Contact Haozhiseng Audio for pricing, system configuration support, and OEM/ODM inquiries.
Website: www.hzsaudio.com
Email: [email protected]
