Item Type: AMP board <br>Power Supply: DC dual power supply ± 58 ± 70v <br>Rated Output Power: 500w (± 65v power supply, 4 ohm load, 10% deformation) <br>Efficiency:> 90% <br>Signal to Noise Ratio: 90db <br>Total Harmonic Distortion: <br>380w (± 65 power 4 ohm speaker, distortion <0.1%) <br>280w (± 65 power 8 ohm speaker, distortion <0.1%) <br>Frequency Range: 20Hz-20kHz <br>Speaker: 4-8ohm <br>Voltage Magnification: 36 times <br>Input Sensitivity: 1.5v (RMS) <br>Output Short Circuit Protection: Yes <br>Output DC Bias Protection Speaker Protection: Yes <br>Overheat Protection: Yes, the temperature of the radiator is higher than 100 ° C, turn off the output! <br>Product Size: Approx. 100 x 42 x 35mm / 3.94 x 1.65 x 1.38in <br>Net Weight: Approx. 100 g / 3.5 oz<br>1、With output short circuit protection, this AMP board can be easy to use in the practical life. <br>2、Amplifier module supports output DC bias protection and speaker protection, which makes itself getting great popularity. <br>3、Over temperature protection means that the output will turned off when the temperature of the heat sink FET is higher than 100 °C. <br>4、Easy to use in the practical life, such audio parts supports simple installation, practical. <br>5、After many inspections before leaving the factory, such circuit board quality is guaranteed, you can use it with confidence.1 x AMP Board