2X HiFi 500W Digital Amplifier Class D Audio Amplifier Board Module with Speaker Protection LM3886 IRS2092S

About this item 1. Power supply voltage: dual DC power supply ±45–±70V (recommended +-65V power supply can be) 3. Efficiency: equal 90% 4. Signal to noise ratio: 90dB 2. Rated output power: 500W (±65V supply 4 ohm load, distortion degree 1%) 5. Total harmonic distortion: 380W (±70 supply 4 ohm speaker, distortion Less than 0.1%). 280W (±70 powered 8 ohm speaker, distortion Less than 0.1%)