This is the bare PCB of the output stage of solid-state amplifier in a push-pull configuration. Features : 1. The PCB is very flexible and can be used from 1 pair to 3 pairs of power transistors in parallel; 2. Either metal casing TO-3 or plastic casing TO-247 power transistors can be used with this board; 3. The board can be used for both power bipolar transistor and some popular power MOSFET like IRFP240 and IRFP9240. 4. The board contains the voltage driving stage, and a component board space reserved for inclusion of a Vbe multiplier in case users want to embed the Vbe multiplier onto the board and thermocouple to the power transistors. This is a bare PCB that can form the output stage of a power amplifier. Two PCBs are required to form a stereo configuration. PCB dimension : 300mm x 70mm. We do air shipping worldwide at US$5.00.