Tips: The default power supply voltage amplifier board dual power ± 58 --- ± 70V, The voltage lower the lower the wattage outputmain technical parameters: 1. Power supply: dual DC power supply --- 58 ± 70V ± 2. Rated output power: 500W (10% ± 65V power supply 4 ohm load, distortion) 3. Efficiency:> = 90% 4 . SNR: 90dB 5. The total harmonic distortion: 380W (± 65 powered speakers 4 ohms, distortion