Jim,
Quote:
I assumed, but haven't verified that if I had the 950's bass management turned off that I would lose the LFE output.
You never lose LFE information, whether the 950's analog bass management is ON or OFF. The LFE (.1) channel is sent from your SACD player to the 950 and then from the 950 to your sub. Nothing lost along the way. At worst, you may get additional bass that you don't want; but not less.

Best,
Sanjay
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Sanjay