Power supply: dual DC power supply +/- 58-+/- 70V<br>The rated output power: 500W (+/- 65V power supply, 4 ohm load, distortion 10%)<br>Efficiency: equal 90%<br>: 90dB<br>Frequency range: 20Hz-20KHz<br>Material: CCL<br>Colour: blue<br>The total harmonic distortion:<br>380W (+/- 65 power 4 ohm speaker, distortion Less than 0.1%)<br>280W (+/- 65 power 8 ohm speaker, distortion Less than 0.1%)<br>Speaker: 4-8ohm<br>Voltage Magnification: 36 times<br>Input sensitivity 1.5V (RMS)<br>Output short circuit protection: Yes<br>That output DC bias protection speaker protection: Yes<br>Over-temperature protection: Yes, radiator FET temperature higher than 100 Celsius , turn off the output<br>Product Size: . 100 x 50 x 30mm/3.93 Inch x 1.96 Inch x 1.18 Inch <br>Net weight: .100g/pcs<br>Package Contents:<br>2 x Digital Amplifier Module<br>Only the above package content, other products are not included.<br>Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.