HA5004S 1U 4-Channel Class D Professional Power Amplifier for Live Sound, Touring & Installation
Product Overview
The Haozhiseng Audio HA5004S is a compact 1U 4-channel Class D professional power amplifier designed for live sound, touring systems, fixed installations, stage audio, rental systems, and professional PA applications.
With 4 × 500W at 8Ω and 4 × 900W at 4Ω, the HA5004S delivers stable output power for driving top speakers and full-range loudspeaker systems. Its high-efficiency Class D design provides strong performance while reducing weight, heat, and rack space requirements.
Built in a 1U rack-mount chassis, the HA5004S offers high power density in a lightweight and compact structure, helping system users save installation space and improve system flexibility. Advanced protection circuits help prevent overload, short circuit, over-voltage, under-voltage, over-current, overheating, and DC output damage, ensuring reliable operation in demanding professional environments.
Key Features
4-Channel Professional Amplifier Design
Provides four independent output channels for flexible sound system configuration.
High Power Output
Delivers 4 × 500W at 8Ω and 4 × 900W at 4Ω, suitable for professional PA top speakers and full-range systems.
Compact 1U Rack Space
Slim 1U design saves rack space and makes the amplifier ideal for touring racks and fixed installation systems.
High-Efficiency Class D Platform
Class D technology improves efficiency, reduces heat generation, and supports lightweight system design.
Reliable Cooling System
Built-in fan cooling helps maintain stable working temperature during long-term operation.
Complete Protection Functions
Includes short circuit, DC protection, over-voltage, under-voltage, over-current, and over-temperature protection.
Typical Applications
Live sound reinforcement
Touring PA systems
Stage audio systems
Rental sound systems
Fixed installations
Full-range speaker systems
Top speaker amplification
Churches, theaters, clubs, and performance venues
Technical Specifications
| Item | Specification |
|---|---|
| Model | HA5004S |
| Amplifier Type | 1U 4-Channel Compact Class D Professional Power Amplifier |
| 8Ω Stereo Power | 4 × 500W |
| 4Ω Stereo Power | 4 × 900W |
| 8Ω Bridged Power | 2 × 1600W |
| Frequency Response | 20Hz – 20kHz ±1dB |
| THD+N 1kHz 1W 8Ω | <0.1% |
| Signal to Noise Ratio 1kHz | >110dB |
| Class | D |
| Protection | Short Circuit, DCP, OVP, UVP, OCP, OTP |
| Operating Voltage | 90V–135V / 180V–265V |
| Input Sensitivity | 1V |
| Input Impedance | 20kΩ |
| Dimensions (W × H × D) | 483 × 44 × 325 mm |
| Packing Dimension | 550 × 100 × 450 mm |
| Net Weight | 5.8 kg |
| Gross Weight | 7.4 kg |
Why Choose HA5004S?
The HA5004S combines compact 1U rack design, 4-channel output, Class D efficiency, strong protection, and reliable cooling in one professional amplifier platform. It is a practical solution for sound companies, system integrators, rental users, and installation projects that require powerful output, lightweight design, and stable long-term performance.
