OK Sunn gurus - I bought a Beta 2x12 and the seller says one of the speakers is inoperative. Who made the speakers with the big square magnets that were used in the Beta? Obviously, I will check out the speaker connections/wiring, and bug carcasses which may be jammed in the works, but I am generally not lucky enough to get the easy fix. May also need a footswitch if anyone has one for sale. Thanks for the help guys!