I have only one two channel sacd, so maybe its different than most, but I know that zero information is output from the sub pre-out. I wanted to wire it so that the sub/m22 would act like a full range speaker to the receiver. I know the low freq would still be sent to the m22's but at least they naturally roll off and then the sub could pick it up from there. I don't think my DVD player has an option to send LFE from 2 channel SACD's to the sub, so that is not an option.

I have emailed axiom about the simultaneous connections.

I know how resistors add in parallel (BSME), that's why I asked about the input impedance, but thank you.

I guess I'll just have to wait until I go home this weekend and try a few things. This week cannot go by fast enough!