My question would be: Why was everyone playing so loud that rafters were shaking at a rehearsal? A Rumble doesn't have the capabilities of an SVT with 2 fridges! As a veteran of hard rock doing large shows with pitiful PA support, and now suffering with permanent tinnitus and a condition where both ears have profound loss in different ranges - can still hear reasonably well live but cannot understand anything over the telephone - the cost of playing too loud is far higher than a blown speaker. If the guitarist cannot turn down without losing all his tone, as it was back in the days of multiple 100W Marshall Plexi stacks, he needs to be using a smaller amp or use pedals. Same for a drummer who uses 3-S sticks and puts hard wood ball kick beaters thru heads. Blasting in a small space makes nothing but noise. The guitarist who owns the amp should have known it's not made to be played wall rattling loud.