Question for y'all...
When did the BB750 get an active/passive pad switch? The last times I tried them out was early on and they didn't have the pad switch. I just noticed the two currently in the classifieds have them, which is a big requirement for me.
I was settled on the M6 (pad switch, and 2ohm), but now this opens up the options since I always liked the drive of the 750.
Mesa had big trouble with the active/passive separate inputs (similar to the effects loop jacks, the input that was not used eventually started to crackle and cause cut out problems). They fixed this issue by replacing the second input with an active/passive (i.e., pad) switch.
Per the above, the BB750 and M6 sound VERY different... know what you are looking for before you purchase.
Not sure why a pad switch would be any different than separate active/passive inputs... same exact thing.