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1. Class AB Amplifier with Bridge Function

2. The Length of Heat Sink: 300mm 

3. Short Circuit Protection & Overtemperature Protection

4. LPF & HPF & Gain Controls for Rear Channel

5. HPF & Gain Controls for Front Channel

6. Bass Boost: 0dB/6dB/12dB

7. LPF Filter: 50Hz-250Hz

8. HPF Filter: 120Hz-3KHz

9. THD≤0.1%

10. Frequency Response: 30Hz-20KHz

11. Signal to Noise Ratio: >90dB

12. Input Sensitivity: 100mV

13. RMS Power: 4×40W

14. Same heat sink is available for 2×40W, 2×50W, 4×50W also