Ok, so I've had this mesa 4x12 slant cab for about 3 years now and all the sudden the sound quality is worse, at first the volume just started going all wonky during band practice, it almost sounded like someone was turning the volume half way down, then back up then down and so on, and now it doesnt have the same low end punch that it had before... I am running an axe fx standard through a crown into the cab. It has to be the cabinet because the levels on the axe fx do not change while the problems persist and my rig sounds perfectly fine when playing through my other 2x12 cab. I had practice yesterday and I didnt have the extreme volume problems like i had before but the tone was very weak like its not pushing the same amount of power as before. Has anybody had this problem before? You think one of the wires in the speakers are getting loose? Maybe a blown speaker? I have no experience working with wires, so taking a look at it myself wouldnt do much.