Hmm. I think Muse 100 models were the ones I use to have.. Its been over 10 years and cannot remember to be quite honest however they were MONO only versions that I owned. I do believe I remember there being a stereo version as well.. You might not be able to Bridge them, however you can probably conver them to the standard mono block. Also as mentioned you can Vertical bi-amp them as they sit right now no problem, and could be even more effective or desirable depending on the speaker, this is simply taking a bi-wireable speaker and running one 2 channel amp with the left channel feeding the highs, and the Right channel feeding the lows for example, but you will need a Y- spliter RCA set to send the same signal (mono) to the 2 channels to be the same on one amp if that makes any sense.
Good luck
Good luck