Ah, gotcha. So the sub is automatically disabled when the fronts are set to "large" -- I must have missed that. That's sort of a pain.

So the pre/pro will be re-directing the LFE channel to the mains. If the surrounds and center can be set to large (which should be possible, unless I've missed something else), that'd probably be best -- it would let the ICBM handle bass management for those channels. Otherwise the pre/pro will also get involved in bass management on those channels, which we're trying to avoid.

My best guess? The ICBM should be able to re-produce the LFE channel from the mains' signals, but for calibration you'd have to set the mains to small so you could get the test tone from the pre/pro. After calibration I'd switch the mains back to large. While it's true that you'll be blending the LFE channel into the mains at the pre/pro and then re-extracting it for the sub at the ICBM, but it would seem better than the alternative. I can see why this would be an "#*&)@#-kicker".

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