Hi, this is my first post on here, so all apologies if I'm doing this wrong.

But, I've come to notice a strange problem with my fender princeton chorus.  After owning it for about 2 months, a problem has started to occur; the amp will sound super muddy and bassy upon turning it on, then with the slightest tap of the amp (or any movement of the amp) all the bass is cut out and the amp sounds extremely bright and very treble heavy.  I know very little about solid state amps and was hoping someone here could help me troubleshoot.