The IB2i and the IB2S are the company favorites because of their ability to step up to the performance of the MB's and BB's, but you are actually able to lift it by yourself. Whereas with the MB's... Not so much. With the bigger models you have to have a bigger room, with the IB you can get massive and deeply detailed sound, in a relative small room.

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PMC, Bryston, Purist Audio Design.