Hey Folks... Okay maybe I am missing something so simple someone else can say "Well duh" and smack me upside the head because at this point I am confusled.. Okay here is a description of the equipment.. I am running an Onkyo TX-DS787 Receiver which is a THX Select Model and as such uses the THX 80Hz Crossover Frequency and is not user changeable. I am also running an Onkyo M-282 Power Amp My main speakers are Bi-Amp/Bi-Wireable AR9's which have a 10" Sub per cabinent on the LF side of the X-Over and Dual 5.25 Mids with a 1" Tweet on the HF side of the X-Over. I took a RCA Y-Apapter and plugged that into the single RCA SUB Out of the 787 and ran dual RCA Cables to the L and R Input of the M282 Amp and I set the Mains as "Small" and Sub as "Yes" in the bass management of the 787. Unless I am missing something, setting the mains as small and sub as yes should send any and all frequencies below the 80Hz X-over to the M-282 amp and then into the 10" subs on my AR9's.. I am using the regular Front L/R output of the 787 to power the High Frequency drivers. This should give me 200 watts RMS going to the speakers total, 100 to the LF and 100 to the HF.. 100 watts RMS should make those 10's SLAM.. But it's not.. Infact I wasn't getting any output at all through the sub out with the mains set to small. So I connected the L/R Front "Pre Out" to the input of the M-282 and I am getting bass now but it's not the kind of Bass a hundred watts should be... Something just ain't right here..