Also wanted to add: Either case, you have two options on how to split the signal - either use a passive crossover (i believe your MB2 comes with one, mine comes without), or an active crossover like the PMC 10B (for tri-amping) or Bryston 10B or 10B-sub (for bi-amping) and then bypass the passive crossover built into your speakers. The active crossover solution creates less IMD between the channels during amplification. This is because with an active XO, the LF amp only amplifies the LF, and the MF/HF amp only amplifies that, so there's less non-linearity. With a passive XO, the MF/HF amp also gets and amplifies the LF, and includes the distortion products of LF in its output shifted up to the MF/HF area; then the LF is cut out by the passive XO, but the distortion products remain.
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