Hi Richard
Thanks for looking into that for me. The Eclipse speakers as full rangers are a good choice for testing it. I'm a bit stumped too, apart from the NAD white paper and that forum post that suggests the connection of a subwoofer automatically high passes the speakers at 100 Hz I can't find any more information and I've looked hard. I don't want to put you out by trying it until I can get to the bottom of this one point. So (assuming the bass EQ is off) if you connect the subwoofer and turn the volume right down on it there's no noticeable effect on the speakers when you disconnect the sub and then reconnect it (sub volume still 'off')?
It looks like a superb amp and I've not read a negative or even equivocal review of it, the 2.1 feature is really important to me though.
Cheers
Steve