"mains set to large, analog source, stereo bypass = "pure two-channel stereo"....no double bass....no subwoofer...this is exactly what my 950 does".

So have both (my May original and my reddot) of mine. I get zero/nothing out of my sub in above config, it works like it supposed to.

Merc - are you saying in this config on your original you got a "subdued" sound from your sub? Interesting, I've never experienced this.