I completed one today and it sounds surprisingly good on the test stand with no upgrades. The Amp 6 is almost identical to the Amp 3 except that it uses through-hole mounted (instead of surface mount) components, making it much easier to build. I don't plan to sell my SET monoblocks just yet, but for $39 plus $11 air freight it's a good project for anyone wanting to sling some solder. It's complete with power supply on the board, except it doesn't include the power transformer - I'm using a 12.6 volt Radio Shack. I ordered a Hammond chassis plus RCA's, speaker terminals, IEC connector, etc, and will build it into the case when it arrives.