I just got back into playing bass (used to play in high school), i got a Fender Rumble 25 off of craigslist for $40. When i play at low volume (when every one is usually asleep), no problems, but when i crank it past 5 (when i'm alone after everyone has gone to school/work), it gets really staticy. I have the eq middled out (bass, mid, treble all 5), i've messed with the tone and volume on the bass (wasburn xb100 bantam) nothing will stop the static. Is my speaker blown or do i need to adjust something else? I don't want to get another amp since i'm not going to be playing gigs or anything, but when i want to rock, i want to rock, not static. Any ideas?