I suspect that when they built our coach in 2002 that the whole 5.1 surround sound may not have been all that prevalent in motorhomes. The bedroom entertainment option, which consisted of a 40" plasma TV, custom cabinetry, associated video equipment, separate sat receiver, and the Bose system was a frightfully expensive option. Bose actually worked with Beaver in those years and did the system design.
Yes we have mirrored closet doors and I believe they would cause distortion but remember the issue I'm having is only at volume levels that normal people could not tolerate...at least for very long, but great in the shower. Amazingly, you can hear nothing outside the coach.