@seanheis1
Sorry they didn't work out for you. I'm on the other side, they work great for my needs, but then I'm not taking a PC audio output. :)
You asked about inputs. Among some of the things I've read is the use of input coupling transformers. Either 1:1 or 1.4 or 2:1 to increase the apparent input impedance were some of the stories I've read. I"m actually dying to try some from Jensen, but that's another project that will have to wait. Not too terribly expensive, about $70 each
There's a lot of claims of vendors doing this or that to the amps to differentiate themselves. some are true, some are completely bogus but in almost all cases are almost costless. The biggest change which is true is from Theta who started shipping nCore modules with linear power supplies. It's easier to do with nCore since they don't have an integrated power supply like many of the ICEPower modules do. Of course, Hypex sells power supplies, but with the ICEPower 250ASP for instance, the power supply is on board and impossible to remove.
Just to be sure, leave them on 24/7 for a week or so, let us know if the amp warms up at all.
Best,
Erik
