Subwoofer Location?
#21
#22
10's will work too. Just remember 10's have a different bass sound and react to bass differently. The bigger woofer you go, the better they will respond to lower bass freq. 10's make a tighter sound bass than 12's. But if you get a killer set of 10's you should be fine.
Just fyi.
Drippinwet makes a good point too, you can run 3 10s back there. JL Audio make some seriously competition grade 10's that run in series of 3's. I like JL's alot, had 12 12" JL's in my suburban!





