| ■ Fully isolated power supply to eliminate loop interference. ■ Comprehensive circuit protection with reverse polarity protection. ■ Max Power up to 4 × 220W @ 2Ω ■ Custom audio coupling transformer for complete isolation between preamp and power stages, significantly suppressing interference and noise for cleaner sound. ■ PBTL circuit architecture for superior control. ■ Entire PCB circuit design adheres to best practices with proper grounding and minimal circuit noise. ■ Built-in regulated power supply, ensuring internal voltage remains unaffected by fluctuations in the vehicle’s battery voltage. |
| Model: | FH-4 |
| Type: | Class D Four Channels Amplifier |
| Max Power @ 2Ω: | 220 W x 4 ch |
| Nom Power @ 2Ω: | 150 W x 4 ch |
| Max Power @ 4Ω: | 180 W x 4 ch |
| Nom Power @ 4Ω: | 120 W x 4 ch |
| Operating Voltage: | 10.5 - 16.5 VDC |
| Frequency Response: | 10 Hz - 22k Hz |
| Signal Noise Ratio: | 106 dB |
| Distortion Degree(T.H.D.): | ≤0.003% |
| Input Sensitivity: | 1.3 V - 5 V |
| Input Impedance: | 10k Ω |
| Net Weight: | 2.1 kg |
| Dimensions (LxWxH): | 235 x 172 x 50.5 mm |





