Item Type: Power Amplifier Board Material: PC Model: TPA3255 Operating Principle: Class D Standby Current: 80mA Operating Efficiency: > 90% Channel: 2.0 Sleep or Mute: Short circuit mute function Output Power:  315w/4Ω, 10% distortion 185w/8Ω, 10% distortion 260w/4Ω, 1% distortion 150w/8Ω, 1% distortion Frequency Response: 20hz to 20khz Range Dynamics: > 100db signal to noise ratio (snr) > 111db Operating Voltage: DC24-48V switching power supply (recommended voltage 36v) 1、Port Driver Error Correction: Audio amplifier with Class D efficiency for sound quality. With built in feedback design and high speed port driver error correction.  2、Outstanding Audio Performance: The audio amplifier maintains low distortion across the entire audio frequency range while displaying impeccable sound quality. Excellent audio performance.  3、Great Stability: The audio amplifier is stable and the audio amplifier's inductance ensures that the sound is clear and powerful, giving you a perfect experience.  4、High Power Efficiency: Audio amplifier has high power efficiency and low power phase idle loss, main electrolytic capacitor filtering using audio input coupling capacitor.  5、Easy to Install: Our audio amplifier is light weight and very easy to install, just follow the normal operation way to install successfully.