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Originally Posted by PanamaMike /forum/post/15428740
Your problem might be that the acoustimass sub unit really isn't a sub. It contains 5.5 inch woofers that can't reach into the sub sound category. The audyssey may be reporting an error because not enough sub frequency information is present to calibrate.
See this link about Bose measurements and more. I don't post it to be negative, but to give you more info as to why you might be having the problem.
Originally Posted by Steve. /forum/post/15428938
I would guess that it's due to the Bose sub module playing much higher in frequency than a normal sub. It has to play well above traditional crossover points to accomodate for the satellite's lack of mid-bass output. The Audyssey program probably think's it's a "full range" speaker accidentally connected to the sub channel. I have seen this happen before with auto cal. set ups when a DIY sub with no high pass filter is used, the software thinks it's a main speaker.