Item Type: Digital Power Amplifier Board <br>Input Current: AC 24V±24V (recommended power supply voltage: AC24V-0-AC24V) <br>Frequency Response: 20Hz - 20KHz <br>Number of Channels: 2 <br>Output Power: 2x420W <br>Output Impedance: 4-8Ω<br>1、Adopt special inductance for audio to ensure clear and powerful sound to be played out <br>2、The resistor is made of high-accuracy chip resistors to ensure a good signal-to-noise ratio <br>3、This superpower dual-core subwoofer support lossless HD sound quality, built-in fan guarantees long-term operation <br>4、Large heat dissipation area make better maintain long-term operation come true <br>5、Using superb craftsmanship to bring smooth surface without hurting hands in operatePlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.1&nbsp;x Digital Power Amplifier Board