H2-250D 2 × 250W Class-D DSP Plate Amplifier Module for Two-Way Active Speakers
Product Overview
The Haozhiseng Audio H2-250D is a compact two-channel Class-D DSP plate amplifier module designed for small two-way active PA speakers, full-range loudspeakers, and passive-to-active speaker upgrades.
Two output configurations are available. The standard version delivers 2 × 250 W at 8 Ω or 2 × 300 W at 4 Ω, while the customizable bi-amplified version provides 250 W + 100 W at 8 Ω or 300 W + 150 W at 4 Ω. This allows the amplifier to power either two full-range channels or separate low-frequency and high-frequency drivers in a two-way active speaker system.
The integrated DSP provides precise control over crossover, equalization, gain, delay, polarity, limiting, mixing, and mute functions. System parameters can be configured from a computer through USB or RS-485, making the H2-250D suitable for both new active-speaker designs and retrofitting existing passive loudspeakers.
Its compact dimensions and lightweight construction make it ideal for single 6.5-inch, 8-inch, and 10-inch two-way loudspeakers where installation space is limited.
Key Features
- Two-channel Class-D plate amplifier module
- Standard output: 2 × 250 W at 8 Ω or 2 × 300 W at 4 Ω
- Optional bi-amp output: 250 W + 100 W at 8 Ω or 300 W + 150 W at 4 Ω
- Designed for two-way active and full-range loudspeakers
- Integrated professional loudspeaker DSP
- DSP functions include Mute, Polarity, Gain, Delay, Limiter, Mixer, EQ, and Crossover
- USB and RS-485 control
- Compact and lightweight embedded design
- Multiple operating-voltage options
- Comprehensive protection system
- Suitable for new speaker designs and passive-speaker upgrades
Flexible Output Configurations
The H2-250D is available in two output configurations for different loudspeaker designs:
Standard Dual-Channel Version
- 2 × 250 W at 8 Ω
- 2 × 300 W at 4 Ω
- Suitable for stereo, dual-driver, and full-range applications
Customizable Bi-Amp Version
- 250 W + 100 W at 8 Ω
- 300 W + 150 W at 4 Ω
- Suitable for separately powering the low-frequency and high-frequency drivers of a two-way active loudspeaker
Integrated DSP Processing
The built-in DSP allows precise optimization of loudspeaker performance. Each channel can be configured according to the driver characteristics and enclosure design.
Available DSP functions include:
- Mute
- Polarity
- Gain
- Delay
- Limiter
- Mixer
- Parametric EQ
- Crossover
DSP settings can be managed through a computer using either USB or RS-485 communication.
Applications
- Two-way active PA speakers
- Compact full-range loudspeakers
- Single 6.5-inch active speakers
- Single 8-inch active speakers
- Single 10-inch active speakers
- Active stage monitors
- Installation loudspeakers
- Custom OEM and ODM speaker systems
- Passive-to-active loudspeaker conversions
- Replacement and upgrade projects
Technical Specifications
| Item | Specification |
|---|---|
| Model | H2-250D |
| Amplifier Type | Two-Channel Class-D DSP Plate Amplifier |
| 8 Ω Output Power | 2 × 250 W or 250 W + 100 W |
| 4 Ω Output Power | 2 × 300 W or 300 W + 150 W |
| Frequency Response | 20 Hz–20 kHz, ±1 dB |
| THD+N | <0.1% at 1 kHz, 1 W, 8 Ω |
| Signal-to-Noise Ratio | >100 dB at 1 kHz |
| Channel Separation | >80 dB at 1 kHz |
| Amplifier Class | Class D |
| Protection | Short Circuit, DCP, OVP, UVP, OCP, OTP |
| Operating Voltage | 110 V Version: 90–135 V AC |
| 220 V Version: 180–265 V AC | |
| PFC Version: 90–265 V AC | |
| Input Sensitivity | 0.77 V |
| Input Impedance | 20 kΩ |
| DSP Functions | Mute, Polarity, Gain, Delay, Limiter, Mixer, EQ, Crossover |
| DSP Control | USB and RS-485 |
| Dimensions (W × H × D) | 248 × 142 × 70 mm |
| Net Weight | 1.6 kg |
Why Choose the H2-250D?
The H2-250D combines efficient Class-D amplification, flexible output configurations, and professional DSP processing in a compact plate-amplifier design.
Its standard and customizable bi-amp versions support different loudspeaker configurations, while USB and RS-485 control simplify system setup and acoustic tuning. It is a practical solution for loudspeaker manufacturers, OEM and ODM projects, system integrators, and customers upgrading passive speakers into compact active systems.
