HA43K2 17000W 2-Channel Class D Professional Subwoofer Power Amplifier
Short Description
The HA43K2 is a high-power 2-channel Class D professional subwoofer amplifier designed for touring sound, rental systems, live events, clubs, and fixed installations. With up to 2×8600W at 2Ω, a wide-range 90V–260V PFC power supply, and reliable protection circuitry, it delivers powerful, stable, and efficient performance for demanding professional audio systems.
Product Overview
The HA43K2 is a high-performance 2-channel Class D power amplifier developed for professional sound reinforcement applications that require strong output power, high efficiency, and dependable long-term operation. It delivers 2×4300W at 8Ω, 2×7900W at 4Ω, and 2×8600W at 2Ω, providing the power needed for large PA systems, high-output subwoofer cabinets, touring rigs, and demanding installation projects.
Built with advanced Class D amplification technology, the HA43K2 offers excellent efficiency, low distortion, fast response, and reduced heat generation. Its wide-range PFC power supply supports stable operation from 90V to 260V, making it suitable for international touring and different power environments.
With a compact 1U rack design, tunnel-through cooling system, professional input/output connectors, and comprehensive protection functions, the HA43K2 is an ideal amplifier solution for professional users who need powerful bass performance, high reliability, and easy system integration.
Key Features & Benefits
Exceptional High-Power Performance
The HA43K2 delivers impressive output power of 2×4300W at 8Ω, 2×7900W at 4Ω, and 2×8600W at 2Ω. Its strong power reserves allow it to drive large subwoofer systems and high-SPL loudspeaker setups with excellent control, dynamic range, and low-frequency impact.
Stable 2-Ohm Load Capability
Engineered for demanding professional applications, the HA43K2 supports reliable operation under low-impedance loads. This makes it suitable for subwoofer arrays and complex speaker configurations where multiple cabinets are connected in parallel.
Advanced Class D Amplification
The amplifier uses modern Class D technology to deliver high efficiency while reducing power loss and heat buildup. This helps improve long-term reliability, reduce cooling pressure, and provide clean, powerful sound for both mobile and fixed audio systems.
Wide-Range PFC Power Supply
The built-in PFC power supply supports 90V–260V AC, allowing the amplifier to maintain stable performance across different voltage standards. This is especially useful for touring sound companies, rental systems, and international installation projects.
Intelligent Protection System
The HA43K2 includes multiple protection functions such as under-voltage protection, DC protection, over-temperature protection, overload limiting, and short-circuit protection. Clear front-panel indicators allow users to monitor operating status quickly and manage the system with confidence.
Typical Applications
Professional Subwoofer Systems
Ideal for driving high-output subwoofer cabinets in concerts, festivals, clubs, DJ systems, and large entertainment venues.
Large-Scale Sound Reinforcement
Suitable for PA systems used in outdoor events, live productions, performance venues, stadiums, and high-SPL sound reinforcement projects.
Rental & Touring Audio Systems
The compact 1U design, high output power, and reliable protection system make the HA43K2 a practical choice for rental companies and touring sound providers.
Fixed Installation Projects
Perfect for theaters, houses of worship, auditoriums, convention centers, nightclubs, and other venues requiring stable high-power amplification.
Specification
| Item | HA43K2 |
|---|---|
| 8Ω Stereo Power RMS | 4300W × 2 |
| 4Ω Stereo Power RMS | 7900W × 2 |
| 2Ω Stereo Power RMS | 8600W × 2 |
| 8Ω Bridged Power RMS | 15700W |
| 4Ω Bridged Power RMS | 17100W |
| Frequency Response | 20Hz–20kHz, 1W @ 8Ω, ±0.5dB |
| Total Harmonic Distortion | <0.5% from 1W to full power, typical value <0.05% |
| Signal-to-Noise Ratio | >110dBA, 20Hz–20kHz, A-weighted |
| Gain / Sensitivity | 32dB, 35dB, 38dB, 41dB |
| Cross-talk | >66dB @ 1kHz |
| Slew Rate | 50V/μs @ 8Ω |
| Maximum Output Voltage / Current | 185V / 85A, 370V in bridge mode |
| Standby Power | 47W / 0.8A |
| Operating Temperature | 0°C–45°C / 32°F–113°F |
| Cooling System | Tunnel-through cooling system |
| Input Connectors | 3-pin XLR, electronically balanced |
| Output Connectors | Neutrik speakON |
| Protection | Under-voltage, DC, over-temperature, overload limiter, short-circuit protection |
| Operating Voltage | 90V–260V |
| Input Impedance | 10kΩ balanced |
| Damping Factor | ≥5000 |
| Dimensions W × H × D | 490 × 50 × 482 mm |
| Packing Dimension | 610 × 560 × 103 mm |
| Net Weight | 12 kg |
| Gross Weight | 16 kg |
