KNACRO 50W50W TPA3116D2 HiFi high-Power Digital Amplifier Board 2-0 Stereo Dual Channel with pre-Tuning Enlarge DC 12V ~ 22V Input

The power supply voltage: DC12V-22V The maximum output power: 2*50w The effective rate: > = 90% Signal-to-noise ratio: 100 db The total harmonic distortion (50 w / 1 KHZ ? / 24 v / 4-0.1%) (30 w / 1 KHZ / 24 v/? 8-0.1%) Frequency response range: 20 hz - 20 KHZ Input impedance: 30 k ? Speaker: 4 to 8 ? 26 db voltage gain Board Size:60*48*16mm(L*W*H). Potentiometer center distance: 25 mm Weight: 35 g Caution: 1. The power supply voltage limit of 24V, do not exceed! Otherwise easily capacitance explosive slurry, rectified AC voltage spikes do not exceed 25V. Do not exceed the power supply voltage, positive and negative do not reversed. 2. Recommended power supply is 22V / 5A more filtering better power supply, the lower the voltage, power smaller. 3. The speaker recommended 40-80W speakers. 4. Do not short circuit the audio output is shorted to ground or to each other. 5. Please carefully check before electricity, ensure the wiring is correct after only pass.