HA2504D 1800W 1U 4-Channel Class D DSP Power Amplifier for Home Theater and Professional AV Systems
Product Highlights
- 4 × 250W at 8Ω
- 4 × 450W at 4Ω
- 2 × 800W bridged at 8Ω
- Four-channel Class D amplification
- Integrated 4-input/4-output DSP processor
- Compact and lightweight 1U rack-mount design
- High-efficiency forced-air cooling system
- Comprehensive amplifier and output protection
- Front and rear USB control ports
- RS-485 control for multi-amplifier systems
- 20 user-programmable presets
Product Overview
The Haozhiseng Audio HA2504D is a compact 1U, four-channel Class D power amplifier with an integrated 4-input/4-output DSP loudspeaker processor.
Delivering up to 4 × 450W at 4Ω, the HA2504D combines reliable amplification, digital signal processing and flexible system control in a lightweight rack-mount enclosure. It is suitable for home theaters, permanent installations, portable corporate AV systems and small live sound applications.
The built-in DSP provides crossover, parametric EQ, delay and limiter functions, reducing the need for an external loudspeaker management processor. Users can configure, save and recall up to 20 presets for different loudspeakers, rooms and system applications.
With USB and RS-485 connectivity, the HA2504D can be controlled from a computer for convenient system setup and management. Its efficient Class D design, forced-air cooling system and comprehensive protection circuits help ensure stable and reliable operation.
Key Features
Four-Channel Class D Amplification
The HA2504D delivers:
- 4 × 250W at 8Ω
- 4 × 450W at 4Ω
- 2 × 800W bridged at 8Ω
Its efficient Class D topology provides reliable output power while reducing heat, weight and power consumption.
Integrated 4-In/4-Out DSP
The built-in digital signal processor provides professional loudspeaker management functions, including:
- High-pass and low-pass crossover filters
- Parametric equalization
- Output delay
- Limiter
- Channel routing
- Preset storage and recall
Flexible Computer Control
The amplifier provides:
- 1 × front-panel USB control port
- 1 × rear-panel USB control port
- 2 × rear-panel RS-485 control ports with RJ45 connectors
These connections allow convenient PC control and multi-amplifier system management.
Compact 1U Design
With dimensions of only 483 × 44 × 325mm and a net weight of 5.7kg, the HA2504D saves rack space and is easy to transport and install.
Efficient Cooling and Protection
The forced-air fan cooling system helps maintain a safe operating temperature. Integrated protection circuits improve operational reliability and help protect the amplifier and connected loudspeakers.
Applications
The HA2504D is suitable for:
- Home theater systems
- Permanent audio installations
- Corporate AV systems
- Conference rooms
- Multimedia rooms
- Small live PA systems
- Bars, cafés and entertainment venues
- Multi-zone audio systems
DSP Specifications
| Parameter | Specification |
|---|---|
| Model | HA2504D |
| DSP Inputs | 4 channels |
| DSP Outputs | 4 channels |
| PC Control Ports | 1 × front USB, 1 × rear USB and 2 × rear RS-485 ports with RJ45 connectors |
| Sampling Frequency | 48kHz |
| DSP Processing | 48-bit fixed-point DSP |
| A/D and D/A Conversion | 24-bit |
| Dynamic Range | >110dB |
| Frequency Response | ±0.25dB, 20Hz–20kHz |
| Distortion | <0.01%, 20Hz–20kHz at +10dBu balanced input |
| Signal-to-Noise Ratio | >110dB |
| Crossover Filters | Independently adjustable HPF and LPF on each output channel |
| Filter Types | Butterworth, Bessel and Linkwitz-Riley |
| Crossover Frequency | 20Hz–20kHz |
| Filter Slopes | 12, 18, 24 or 48dB/octave |
| EQ Bandwidth | 0.2–36 octaves |
| EQ Frequency Range | 20Hz–20kHz |
| EQ Gain Range | -24dB to +12dB |
| EQ Adjustment Step | 0.2dB |
| Delay | 0–115ms |
| Display | 2 × 20-character LCD |
| Preset Storage | 20 user-programmable presets |
Amplifier Specifications
| Parameter | Specification |
|---|---|
| Model | HA2504D |
| Amplifier Type | Four-channel Class D DSP power amplifier |
| Output Power at 8Ω | 4 × 250W |
| Output Power at 4Ω | 4 × 450W |
| Bridged Output Power at 8Ω | 2 × 800W |
| Frequency Response | 20Hz–20kHz, ±0.5dB |
| THD+N | 0.10% at rated power, 4Ω/1kHz |
| Signal-to-Noise Ratio | 110dB |
| Input Impedance | 20kΩ balanced / 10kΩ unbalanced |
| Output Connectors | Speakon-compatible connectors |
| Power Supply | 100–120V AC, 50/60Hz or 200–240V AC, 50/60Hz |
| Cooling System | Forced-air fan cooling |
| Rack Height | 1U |
| Dimensions | 483 × 44 × 325mm |
| Net Weight | 5.7kg |
Why Choose the HA2504D?
The HA2504D combines four-channel amplification, professional DSP processing and computer control in one compact 1U unit. It helps reduce external equipment, simplify system wiring and save valuable rack space.
Whether used in a home theater, corporate AV installation or small live sound system, the HA2504D provides flexible signal processing, reliable output power and convenient system management.HA2504D 4-Channel Class D DSP Power Amplifier
