On list is an assembled board of stereo power amplifier, based on two pieces of good sounding and very reliable power amplifier IC LM1875T. While LM1875T has been in the market for a while it is renowned for good sound and popularly used in "gainclone" projects. This board features high quality components such as Dale resistors on the audio path, film capacitors at input coupling and thick copper trace PCB( 75um -- four times standard thickness !) and on-board power supply to simplify connections while implementation and guaranteed the performance. Specifications : Output power : 25W + 25W ( at +/-25VDC) Input voltage : 18Vx2 AC to 20Vx2AC Board dimension : 125mm x65mm LM1875T is a class AB amplifier and requires being mounted on heatsink to perform. The circuit is a standard design and we DO NOT provide schematic to buyers.