Entry level SOHA kit

This is the entry level SOHA kit with all the parts needed to Build the headphone amplifier board including transformer, caps resistors and PC board.

Level 1 SOHA kit

This is the entry level SOHA kit with all the parts needed to Build the headphone amplifier including Alps pot and transformer, enclosure, caps resistors and PC board

Level 2 SOHA kit

This is an upgraded SOHA kit with all the parts needed to Build the headphone amplifier including Alps pot and transformer, enclosure, caps resistors and PC board