1、The sound of the amplifier is very balanced, the bass is steady and powerful, the treble is clear, and the expansion is good 2、With high frequency and low resistance capacitance, stable and reliable performance 3、Use professional amplifier chips and audio components, with excellent sound quality, reduce distortion 4、Adopted of high quality electronic components, and accuracy process, ensure for the durability 5、Great workmanship, perfect replacement for the old or damaged one Item Type: Digital Amplifier Module Material: Plastic Model: IRS2092S The Rated Output Power: 500W (+/- 65V power supply, 4 ohm load, distortion 10%) Efficiency: ≥ 90% SNR: 90dB The Total Harmonic Distortion: 380W (+/- 65 power 4 ohm speaker, distortion Less than 0.1%) 280W (+/- 65 power 8 ohm speaker, distortion Less than 0.1%) Frequency Range: 20Hz-20KHz Speaker: 4-8ohm Input Sensitivity: 1.5V (RMS) Output Short Circuit Protection: Yes That Output DC Bias Protection Speaker Protection: Yes Over-Temperature Protection: Yes, radiator FET temperature higher than 100 Celsius, turn off the output! Amplifier Board Size: Length x width x height = Approx. 98 x 43 x 30mm / 3.9 x 1.7 x 1.2in Use Precautions: Recommended Power Supply: DC58-70V Recommended 4-8ohm / 10-18inch speaker Carefully check before electricity, ensure the wiring is correct. 1 x Digital Amplifier Module