You've got an interesting question, and one that fortunately has been kicked around a fair bit here in the Saloon. With the 950's stereo bypass mode, the left and right channels get a true bypass signal -- full-range, no manipulation. At the same time, though, there is a somewhat undocumented bit of activity going on in the background if you have the mains set to "small." Specifically, with the mains set to "small" and stereo bypass engaged, a copy of the signal is run through A/D conversion and on to the bass management, where the specified crossover point is used to produce a signal for the subwoofer to use. So to do what you are interested in doing, you will need to set your mains to small (which you may already have done).

Part of why this was originally discussed was the "double bass" concern -- the mains get the full range while some of that material is also delivered to the sub. The method that soundhound suggested would avoid this, as the bass management there includes both high-pass and low-pass rather than only the digital domain low-pass of the "small" stereo bypass approach.

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