HA1804 18000W 4-Channel 1U Class D Stereo Power Amplifier with PFC
The HA1804 is a compact and lightweight 4-channel Class D professional power amplifier designed for medium and large live sound systems, touring rental projects, and fixed installations. Built in a 1U rack-mount chassis, it delivers powerful output, high efficiency, stable performance, and reliable protection for demanding professional audio applications.
Key Features
- High Power Output
Delivers 4 × 1800W @ 8Ω, 4 × 2800W @ 4Ω, and 4 × 4500W @ 2Ω, providing strong and stable power for professional loudspeaker systems. - Lightweight 1U Class D Design
High-efficiency Class D amplification in a compact 1U rack space saves installation space and reduces transportation weight. - PFC Wide Voltage Power Supply
Built-in PFC power supply supports 90V–260V wide operating voltage, suitable for different regional power systems and touring applications. - Efficient Cooling System
Equipped with high-efficiency heatsinks and intelligent cooling fans to maintain stable operation under heavy working conditions. - Reliable Protection System
Provides protection against short circuit, DC voltage, over-temperature, overload, under-voltage, and current inrush, ensuring long-term reliability.
Product Overview
The HA1804 4-channel Class D amplifier is a flexible and reliable professional power amplifier in a compact 1U rack-mount housing. It is designed for medium and large live sound systems, installed audio projects, conference halls, clubs, churches, and stage performance applications.
With powerful output capability and clean sonic performance, the HA1804 delivers 4 × 1800W at 8 ohms, 4 × 2800W at 4 ohms, and 4 × 4500W at 2 ohms. It is ideal for driving full-range speakers, stage monitors, and professional PA systems.
The DSP version is available as HA-DSP1804.
Amplification
The HA1804 uses advanced Class D power amplification technology, combined with Nichicon capacitors and high-efficiency cooling heatsinks. This design provides lower heat generation, higher energy efficiency, and stable audio performance for professional sound reinforcement systems.
Power Supply
The built-in PFC power supply provides wide AC voltage compatibility from 90V to 260V, allowing the amplifier to operate reliably in different countries and power environments. It helps ensure stable output performance even under demanding working conditions.
Cooling System
The HA1804 features Nidec cooling fans with a thermal-dependent fan control system. The fan speed automatically adjusts according to the internal temperature of the amplifier, helping to achieve efficient cooling and reliable long-term operation.
Protection
For safe and dependable use, the HA1804 includes multiple protection circuits, including under-voltage protection, DC protection, over-temperature protection, overload limiting, short-circuit protection, and current inrush protection. These features help protect both the amplifier and connected loudspeaker systems.
Applications
- Live sound reinforcement
- Touring rental systems
- Fixed audio installations
- Clubs and entertainment venues
- Churches and worship halls
- Conference rooms and auditoriums
- Stage monitor systems
- Professional PA speaker systems
Technical Specifications
| Item | HA1804 |
|---|---|
| 8Ω Stereo Power RMS | 1800W × 4 |
| 4Ω Stereo Power RMS | 2800W × 4 |
| 2Ω Stereo Power RMS | 4500W × 4 |
| 8Ω Bridged Power RMS | 5600W × 2 |
| 4Ω Bridged Power RMS | 9000W × 2 |
| Frequency Response | 20Hz–20kHz, ±0.5dB |
| THD @ 1kHz | 0.01%–0.03% |
| Signal-to-Noise Ratio | ≥104dB |
| Input Sensitivity | 0.775V / 1V / 32dB selectable |
| Cross Talk | ≥70dB |
| Input Connectors | 3-pin XLR, electronically balanced |
| Output Connectors | Neutrik speakON |
| Amplifier Class | Class D |
| Protection | Under voltage, DC, over temperature, overload limiter, short protection |
| Operating Voltage | 90V–260V |
| Input Impedance | 20kΩ Balanced / 10kΩ Unbalanced |
| Damping Factor | ≥5000 |
| Dimensions | 480 × 430 × 44 mm |
| Packing Dimension | 532 × 522 × 103 mm |
| Net Weight | 10.3 kg |
