Description:High quality filter power supply. The four pins of rectifier respectively in parallel connect with decoupling capacitor, which can effectively eliminate the high frequency interference of AC power grid. Now the clutter interference of power grid is very small and the voltage is quite stable. So the item has better performance.The chip has high conversion rate and strong drive ability. The frequency band is wide and noise is very small.Features:1, Power supply circuit adopts full bridge rectifier.2, Effectively eliminate the high frequency interference of AC power grid.3, Chip has high conversion rate and strong drive ability.4, Better performance,noise is very small.5,Sound warm and distorted, high fidelitySpecifications:Working Voltage: AC double 12-18Vtune type: Low/Middle/High Pitch/VolumeChannel: Double channelAudio Input: RCA socketsAudio Output: 3P terminalInput Voltage: 3P terminalSize: 105 mm x 54 mmWeight: 75gPackage includes:1 x HIFI Preamplifier Control Board ModuleNote:1, Please allow 1-3 mm error due to manual measurement. Thanks for your understanding.2, Monitors are not calibrated same, item color displayed in photos may beshowing slightly different from the real object. Please take the real one as standard.