Its two big caps 10k uf Pannies 8 mur860's on semiconductor diodes on a PC board with the two cap and resistor snubbers. The Trans is not part of the PS you supply that. The upgrade boards with parts are 29$. I am going to try them in my GC. You know I use the AES pre-amp with the GC on my Altecs and it sure sounds nice/ not harsh brittle but nice smooth and sweet. Lot of people who listened want one! Not bad for under 100$. Much nicer than the Sonic T.