I have a rockford fosgate 12" p2 svc 1ohm sub with a r500×1 class d mono amp.i plugged in the pass thru and hooked it to a ssl fr1000.2 channel amp and a 4 ohm 15" brutus. The rockford sub was playing good but the brutus sub wasnt getting anything but the ssl amp was fine not in protection mode,why is that and second question is can i take my rockford p2 1 ohm and have that and the butus hooked to the 1000 amp without hurting amp or sub. Rms is 250×2@ 4 ohms and 500×2@ 2 ohms and 1000 by 4 ohms.i would like to use the pass thru if i can instead of having to run more lines from battery. I thought you just plug the pass thru into the other amp and good to go.any help would be greatly appreciated.