I'm having trouble with what i want my subwoofer/amp/capacitor configuration to be. I am not at all familiar with system configurations in a reg cab cuz this is the first one I've owned. I'm only 5'9" so how much speaker could i cram behind the seat while loosing minimal leg room. Also, I already have a cap and 500w RMS amp that im not sure will fit under a seat. Should i only go with 1 12 or something and have my amp and capacitor mounted on the cab on the opposite side??