I am planning to get 2 10" rockford fosgate P1 subs w/ a custom box under the rear seat and a RF 900w mono amp a p3001.Do u guys think this will sound good? This will be in a 2004 f-150 supercab

 

Yes it is a good match. Not sure how it will sound but am sure it would sound fine. That amp by the way will be 300 watts with 2 4 ohm subs and 150 watts with 2 8 ohm subs. I'd go with the 4 ohm subs myself.

One other thing i'll point out is the mounting depth is marginal to fit under your back seat. The adire kodas are alot thinner and would make some serious noise in the 04.