I love this forum, and I love getting lost in some of the threads... Did not see this specific item - I have an old Peavy 1516 cab (not the PVM). Just picked it up from a national music store. Item is rated at 4 Ohms, and I need it to run an all-tube amp that requires 4 or 2 Ohms. I took readings at each input jack (see pic) the bi amp inputs are 3.8 Ohms and the full range inputs are about 7.0 ohms. I believe this cabs should be about 4 ohms each input. The cab sounds fine on all the inputs with my solid state amp that runs at 4 or 8 Ohms. The tube amp sounds fine through the biamps, but not through the full range, so I turned it off right away. I don't want to run the tube amp at anything other than the rating - (the manufacturers says not to,) and don't want to be a cowboy about the thing. Anyway, why is the full range running at different than spec, and can it be fixed? I wonder if the problem is the crossover, and whether that can be fixed or replaced.