Thank you everyone for the inputs. I really appreciate it. It looks like I bought a model 4 amp since it does not balanced input. Anyway, I like the sound of this amp very much. The only slight negative is the bottom end. Also, I have been turning it on/off. I usually turn it on for an hour before listening. Based on most of your inputs, it sounds like I should leave it on constantly. I will try that next. Again, thanks. Regards.
Thong
Thong