This is Diy Kits.you need do it yourself ! 1PCS board 1 channel.
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Recommended input voltage: single power supply DC 20V-0, the maximum should not exceed 30V, the transformer recommended more than 100 watts AC 15-20V range, the voltage is too high, except for the increase in heat, there is no positive effect.
All transistors are brand new, including k170 and ZTX653, IRF240, new original tube is the guarantee of quality
Recommended radiator 0.8KG one side.
PCB size: 98X52MM, double-sided gold plating
Output power: 8W, equivalent class AB amplifier 25W.