I'm going another route in my SuperCrew F150 and due to underseat space limitations, I'm limited with sub choice. I'm looking for a bit more output than what I have now and going to go with 2 12" Kicker L7T's sealed. I'm no good with modeling subs and was wondering if anyone could help me determine the optimum volume for these bad boys. Recommended spec is .55-1.25 which is a pretty good range. I'll be putting 600-650rms to each. Thanks in advance.