Hi, I have a problem with my speaker. Its a 15 watt, and when I go past 7 certain notes start to buzz. I'm not talking about an annoying buzz due to a bad cable. It seems like my speaker is vibrating a lot. It only happens with certain notes, mostly with the C# on the 6th string.
Well a 15 watt SS amp pushed to 7 should be in the clipping realm which might be what your hearing. Also could be a number of other things so its really hard to say. But if it only happens when you hit 7 or close to 7 its probably clipping...