99 f250 supercab need a sub box. Have to keep back seat clear.

 

Not sure how clear you need the back to be, but I ran a Q-Logic center console (made for the super/ext. cabs) in my 2000. I loved it, very durable (have 4 kids). If you need the rear center seat, there won't be any leg room for that person (I had a car seat in mine). Bought it from the scratch and dent section of crutchfield.

Hopefully this link works: http://www.crutchfield.com/p_044CFSX...Q-Logic&tp=129

 

I built a down firing .625 cubic ft box for between then console & rear seat in my F250 crew cab. It hits good for just a MTX Jackhammer 10 with a 250 watt Kenwood amp driving it. You lose the middle seat leg space but I have less than $15 in the box

 

If you are looking for a pre fab box, supercrewsound and fox acoustics make drop in boxes that dont infringe on leg room. Different truck, but in my 04 screw imhave a dual 10 fox box and I am very happy with it, and have had no complaints from rear passengers. Before this box i used a q-logic single 10 enclosure that went under the drivers rear seat and it sounded very good and took up very little room.

 

I used a Q Logic box in my 97 F150. It went under the rear seat. It held 2/8s & sounded great. It took up no seat or leg room. They make boxes for most trucks.