First post here. Brief history. Just bought (yesterday) a bunch of new (to me) gear. Peavy Cirrus 5 18 volt. Ampeg 6x10 cab. Mesa Carbine M9 amp. The amp and cab were my band's now previous bass player. They have been around for a while. There's also a Fuhrman power conditioner and a rack-mounted tuner. Hooked everything up last night and was working fine. After about 20 minutes the sound cuts out. There is TINY amount of volume coming from the cab. Very tinny sounding. Plugged the amp into another cab in the room and sounded great. Know it's the cab. It doesn't seem like a blown speaker. I've had plenty of experience with that. There is none of that broken sound. Just the very quiet tinny sound. One of the speakers in the cab has been replaced within the last 2 months. Any ideas out there to what it could be? Would the higher voltage bass blow the crossover? Thanks!