[flatst]

I just built my O2 amp and there seems to be a buzzing sound in my right ear of my Mad Dog. Currently, my setup is computer>O2>Mad Dog. The buzzing only starts about 30 seconds after I turn the amp on and doesn't change if I change the volume. I'm currently running on a 15VAC 500mA AC Adapter.
 
Any suggestions?

 

[billybob_jcv]

I think you are going to need to ask this question in the DIY forum.