PCB with 1.6mm thick double-sided sheet, copper thickness of 2.0 oz spray tin process, to ensure the good performance of the current size, first-class quality of the PCB.

Switching power supply is more stable than ordinary transformer voltage, smaller, lighter, more powerful, widely used in various digital amplifier!

Input voltage: 110-220V

Output voltage: DC (+25 V) -0 - (-25V) 200W (+15 V) -0 - (-15V) (5W)

Size (length/width/height): 150 × 80 x33mm 

 1. The pin marked "MUTE" button (located >on the 4-pin connector +-15V) is not useful, it makes no sense, you don't need to use it.

2. The left of that connector is the connector CON1. it is aslo not useful, it does not make sense, you don't need to connect it, either.

3. The maximum voltage/current with passive cooling is DC28V  4A.