Hey guys, so I was looking at getting a sub for the back seat of my 01 Tacoma Extended Cab. Trying to stay under $400. For the sub I was thinking a C2 Audio Threatcon-2 12" in dual 4-ohm or maybe a sundown e-series? What do you think for a box? I was thinking maybe have double 07 build me a custom one but does anybody know what shipping runs? For the amp I was thinking a Audiopipe ASPM-1300. I am trying to avoid having to upgrade my electrical system do you think I'd be alright with this amp, a 4-gauge wiring kit and wiring the sub in a 2 ohms? I'm open for opinions about every part of the setup. Thanks guys!