So, do you get any sub output from sources other than your CD/DVD player?

I finally got my outboard 5 channel amp in place so I could hook twin subs into the stereo outputs of the ICBM. Results? Very unsatisfying. I haven't calibrated the system, or checked whether it may sound better with phase reversed in either or both of the subs, but so far, not happy.

System:

Onkyo 797THX as preamp/processor
Anthem PVA-5 amp
Philips SACD1000
Outlaw ICBM-1

Michaura M665 towers (Front L/R) Axiom made
Klipsch KLF-C7 gigantic center speaker
Michaura M66 side surrounds

Klipsch LF10 1640 watt 10" sub
Velodyne CHT10 10" sub

I put the Outlaw between the Onkyo receiver-preamp and the Anthem PVA-5 amplifier. Subs connected to Outlaw stereo sub outs.

Question for Outlaw gurus, how should the back selectors of the Outlaw be set to get the most out of this setup?