I think I just blew the speaker in my amp! It's a Crate RFX65. I was checking to see how loud it would get on the Solo (basically heavy distortion) channel. I got up in between 3 and 4 on the dial, and it sounded fine. Really loud But when I turned it up to 5, it started to sound like crap. Really muddy, couldn't hear pinch harmonics or much high end at all. So I ran over and turned it down, and now it won't get loud at all, and all I can hear is very low end, and it's got hardly any drive on it. It distorts, but in a bad way, like when you turn your radio volume up too loud. What should I do to check it?
it doesn't sound like it's a blown speaker to me, i think you may have fried something else in it
My Guitars:
Gibson Les Paul Studio
Epiphone AJ
Ibanez Strat Copy

Orange Tiny Terror Head
Old beaten up Peavey cab
Marshall MG30DFX
Your amp should be able to go to half way on the dial without blowing the speaker. I would hope they put a speaker capable of handling the amps wattage. If its not the speaker then you have a doorstop. An amp like that isnt easy to fix if at all. Most anything digital is that way anymore, cheaper to build than fix.