Question: Just acquired a monoblock amp (Marantz MA500) in hopes of running a center speaker with my soon-come RR 2150. The RR 2150 manual says I need "Y" interconnects in order to hook an external amplifier up to the receiver's pre-outs/main-ins. Not sure how all this works, so I'm just wondering what to buy. Do I need two of Outlaw's Y-Adaptors and one set of PCA interconnects?