I noticed there is a buzz when I turn volume up past 5.5 mark in my SRM-T1. At 10 it's quite noticeable. Is it normal?
Also, I noticed distortion at really loud volumes sometimes. For example in one of my test songs @ 00:41 onwards ( https://www.youtube.com/watch?v=S8WY03aUsHc ). Not sure if it's the headphone's problem or the amp's. What do you guys think?
I would look at the tubes first. More gain will show up problems wirh aging tubes. Also check the bias, and clean rhe tube pins and sockets.
If the tubes are quite new, it could be a ttansformer related issue, or a dirty volume pot. Or old capacitors. The anp is well over 10years old so might be due a recap. I would PM Spritzer for more detailed tech help.