The amplifier board with ultra-high efficiency， large power， in the case of energy supply 12V 15W + 15 W output power， the chip without heat sink， also has overheated， over-current protection. The board has a switching function， the SW shorted turns off the amplifier.

Main Features:
1. Frequency response: 20Hz - 15KHz
2. Work: Class D (PWM modulation type)
3. Quiescent current: 20mA (D12V time)
4. Signal to noise ratio: 90 percent
5. Power range: DC 6V - 15V (self-protection)
6. Recommended voltage: DC 12V， 2A
7. Recommended speaker: 10 - 100W
8. Input impedance: 15K ohm
9. Output impedance: 4 - 8 ohm
10. Harmonic distortion: Less than 0.1 percent