Adcom DAC

the 700 has hdcd, balanced outputs, better chips, and just sounds better. i used to also own the 600.

I just purchased a GDA-600. I know it's all relative, but it seems to have made quite a difference between my Apple TV and Adcom-565, 555II.

I do notice a very soft buzz/hum from the unit. Does anybody know if that is normal or is something wrong? The seller forgot to send me a power cord (which is on the way), so I just used an old cord from a Dell PC. Could that be part of the problem.

The Adcom was a decent entry level DAC 15 years ago. Technology has gone many miles since this unit was offered. Today most $100 USB DAC's are better.

For very little money you can do much better and get sound that was impossible when Adcom made the 600. Cambridge DAC Magic and Matrix mini-i are two that I would recommend.