I recently ordered a 4ohm 12" Alpine type s subwoofer, it is rated at 300rms watts. Along with it I ordered an Orion Cobalt mono amp rated at 300rms watts at 4ohms and 400rms watts at 2ohms. All the wiring diagrams of a mono amp hooked up to a dual core 4ohm subwoofer show the amp being wired...