Hiraga 30w A class amplifier Do It Yourself Kit. This kit have everything what you need to make your own A class 30W amplifier.
The all output transistors must be mounted on heatsink and heatsinks are only components which are not included in this kit.
El. capacitors are from Nichicon muse kz series, other mostly from Wima, so everything is designed to satisfy very rigorous standards.
On board output transistor are 2sc5200 and 2sa1943
The improvement is that all small and driver transistors are connected as darlington’s what as an result have increased stability and better sound.
pcb is FR4 1.6mm 2oz Blue Immersion silver