I just tested it for audio output. I'm using my computer for source signal and the amp is bridged into an 8 Ohm speaker. It does produce sound. The music is clearly audible and it had no problem making power. I wouldn't exactly call it clean. It has a hiss [similar to white noise] at low volume and no volume with or without source connected I don't recall it being affected by the gain control. It probably wouldn't be an issue in my application, but it does have the potential to run a set of seperates up front sometime down the road. The hiss would drive me nuts in that application. I'm excited to hear it play and grateful for the help getting it to this point. Thanks all. How complicated is it to diagnose the hiss, or should I replace the known defective components at this point and then continue the diagnosis as they may be causing it?