HA2504 4-Channel Class-D Power Amplifier — 4 × 250W at 8Ω, Compact 1U Design
The Haozhiseng Audio HA2504 is a compact 4-channel Class-D power amplifier designed for professional audio installations, karaoke systems, conference rooms, and home theaters. Delivering 4 × 250W at 8Ω or 4 × 450W at 4Ω, it provides flexible amplification in a lightweight 1U rackmount chassis.
With XLR inputs, low distortion, and integrated protection, the HA2504 offers a practical solution for speech and music reinforcement. Its 4.2 kg net weight makes it convenient for portable racks and fixed installations where space is limited.
Key Features
- Four amplification channels: Powers multiple loudspeaker circuits from one compact unit.
- Flexible output configurations: 4 × 250W at 8Ω, 4 × 450W at 4Ω, or 2 × 800W bridged at 8Ω.
- Efficient Class-D amplification: Helps reduce heat generation and power consumption.
- Space-saving 1U design: Fits neatly into professional audio racks.
- Lightweight construction: Just 4.2 kg net weight for convenient handling and installation.
- Professional XLR inputs: Connects to compatible mixers, processors, and other audio equipment.
- Low-distortion performance: THD+N below 0.1% at 1 kHz, 1W into 8Ω.
- Comprehensive protection: Short-circuit, DC, overvoltage, undervoltage, overcurrent, and overtemperature protection.
- Two-year warranty: Backed by Haozhiseng Audio.
Compact Amplification for Flexible Installations
The HA2504 combines four output channels in a chassis measuring 483 × 44 × 325 mm. Its slim 1U format saves rack space while providing amplification for multiple loudspeaker groups.
Use it with compatible external audio routing and processing equipment for conference systems, karaoke venues, home theaters, and commercial sound installations.
Output Power
| Operating Configuration | Output Power |
|---|---|
| 8Ω per channel | 4 × 250W |
| 4Ω per channel | 4 × 450W |
| 8Ω bridged | 2 × 800W |
Bridged operation provides higher output per channel pair for compatible loudspeaker loads. Follow the amplifier’s operating and wiring instructions when configuring bridged outputs.
Clear Sound for Speech and Music
The HA2504 offers a 20 Hz–20 kHz frequency response within ±1 dB, supporting balanced audio reproduction. A signal-to-noise ratio above 109 dB at 1 kHz helps maintain a low noise floor, while channel separation above 70 dB at 1 kHz helps limit crosstalk between channels.
These characteristics support clear presentations, music playback, and vocal reinforcement.
Integrated Amplifier Protection
Built-in protection functions help safeguard the amplifier and connected equipment against abnormal operating conditions, including short circuits, DC faults, excessive current, overheating, overvoltage, and undervoltage.
Voltage Options
The HA2504 is available in two separate voltage versions:
- 110V version: Operating range of 90–135V AC
- 220V version: Operating range of 180–265V AC
Select the appropriate version for the local power supply when ordering.
Technical Specifications
| Parameter | Specification | |
|---|---|---|
| Model | HA2504 | |
| Brand | Haozhiseng Audio | |
| Product Type | 4-Channel Professional Power Amplifier | |
| Amplifier Class | Class D | |
| Number of Channels | 4 | |
| Output Power at 8Ω | 4x250W | |
| Output Power at 4Ω | 4 × 450W | |
| Bridged Output Power at 8Ω | 2 × 800W | |
| Frequency Response | 20 Hz–20 kHz (±1 dB) | |
| THD+N | <0.1% at 1 kHz, 1W, 8Ω | |
| Signal-to-Noise Ratio | >109 dB at 1 kHz | |
| Channel Separation | >70 dB at 1 kHz | |
| Input Connectors | XLR | |
| Input Sensitivity | 0.77V | |
| Input Impedance | 20 kΩ | |
| Protection | Short Circuit, DC, Overvoltage, Undervoltage, Overcurrent, Overtemperature | |
| Operating Voltage — 110V Version | 90–135V AC | |
| Operating Voltage — 220V Version | 180–265V AC | |
| Rack Height | 1U | |
| Dimensions (W × H × D) | 483 × 44 × 325 mm | |
| Packing Dimensions | 550 × 100 × 450 mm | |
| Net Weight | 4.2 kg | |
| Gross Weight | 5.2 kg | |
| Warranty | 2 Years |
Applications
- Home theater systems with external audio processing
- Conference rooms and meeting facilities
- Karaoke and entertainment venues
- Churches and worship spaces
- Restaurants, bars, and retail spaces
- Background music and low-impedance PA systems
- Portable and fixed professional audio installations
Why Choose the HA2504?
The Haozhiseng Audio HA2504 brings four channels of Class-D amplification into a compact, lightweight chassis. Its flexible output configurations accommodate different loudspeaker requirements, while XLR inputs simplify connection to professional audio equipment.
With low distortion, integrated protection, and a two-year warranty, the HA2504 is a practical choice for installers and audio professionals seeking a space-saving amplifier for speech and music systems.
Contact Haozhiseng Audio for pricing, system configuration support, and OEM/ODM inquiries.
Website: www.hzsaudio.com
