NONDK Pure Rear Stage Digital Amplifier Board -2001 TPA3221 100WX2 Dual Channel 200W AMP Bridged Mono Subwoofer Speaker

Adapted power supply: The working voltage range is 10-30VDC, with a limit of 31V. It is recommended to use a DC power supply with a voltage of 24-30V and a current of 10A or more. The higher the voltage, the greater the output power. Never connect to AC power, otherwise it burn out! Gain selection: 2nd DIP switch 2nd gear selection, 28dB, 38dB. Heat dissipation method: Multi tooth heat sink. Adapted speaker: 3-8 ohms, 20-100W in BTL dual channel mode; 2-8 ohms, 50-200W in PBTL mono mode. Bridging method: Turn off the power first, turn the No.1 switch to the ON position, and the output end R+L+is short circuited in parallel for output, while R - L - is short circuited in parallel for output.