Raider -- the sub's role in CD playback will be based on what your receiver or pre/pro is doing, as Alejate has touched on. In a stereo bypass mode or with a six-channel analog input, the sub would not be used (unless you have a 950 and have it configured in a certain way). When using a digital input to receiver or pre/pro, the bass management settings will rule; in that case, the sub would be used if the mains are set to "small".

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