FYI - I can fix, rebuild, modify any component or build something to your liking. If you want to ship something overseas, I can do that for you also. For most of the SA-20 / SA-220 amps, the mosfets burn out and I typically install bipolar transistors. I think they sound better than the mosfets and I think the amps sound better than the original NP amps that Mike designed. I have compared them directly now that I get them into repair. I also add a few additional modifications that I use in my own designs. My prices are about half of what Alta Vista charged.
Send me a message though Agon if you need to contact me. The Alta Vista website seems to be gone.
Send me a message though Agon if you need to contact me. The Alta Vista website seems to be gone.