Hey guys, I have an Alpine sound system set up consisting of a 12" Type S sub, a MRP-M450 Mono amp, a MRP-F450 4 channel amp, two 6x9's in the parcel shelf and front door splits. Im looking at adding another sub to the equation but not sure if I will consequently end up overloading my amp, cause its clearly not worth that. The mono amp is just powering the sub and nothing else. Whereas the 4 channel amp is powering the 6x9's and the rest of the speakers. If I was to connect another sub (which the one I have at the moment is temporary, 12" Pioneer), which amp should I connect it to, or would it be too risky? Thanks guys!