PMC MB2 XBD Quad Amp
 

Hi all,
not to outdo the similar thread asking about single vs bi amping an MB2 SE - this thread is actually what I registered at AA for :beerchug:

I have a pair of MB2 XBD with the following PMC-branded Bryston SST2 electronics:

2x10B hardwired to three-way mode (LF, MF, HF outputs)
3B
4B
2x7B

Currently the LF driver in the MB2 and the XLF driver in the XBD are both wired to the same 7B outputs, essentially just doubling the SPL. However, I don't nearly need those SPL levels, and would much rather have a lower extension using the XLF drivers for lower frequencies.

I would like to add another pair of 7Bs and a single 10B or 10B-SUB (in stereo mode) in order to make this a four-way system.

What is the preferred hook up scheme?

A) DAC -> 10B-SUB -> PMC 10B three-way
B) DAC -> PMC 10B three-way -> 10B-SUB

What are the preferred cut-off frequencies to run the 10B-SUB at?

Thanks