My beloved bass amp finally gave me its first problem ever last Saturday. I hadn't noticed that the cooling fan was turned off so it got hotter and hotter and finally went into thermal shutdown during that middle section of Morning Dew where Phil drops enough bombs to sound like the apocalypse.
My keyboard player and drummmer (the two closest guys) both smelled something burning but I'm hard of smelling and didn't notice anything.
When it cooled down the next morning it turned back on and seems to mostly work, but with a hint of distortion that wasn't there before. It's not a blown speaker or tweeter because I tried it with an extension speaker, and it's not my bass because I tried two different basses. I'm hoping it's just a partially burnt 12AX7, since it's a tube preamp with a solid-state power section... anyone had similar symptoms? The tube is around 7 years old.