re sx18

Hello everyone. I have a re sx 18 d2 and the box i built for it is 9.2 after sub and port displacement. My ? Is what is the max rms i can give this sub with this size box. I understand that the sub can take up to 2k but thats changes for the boxx size right?... as of now i dont have an amp. This...

Hey guys. Picked up this RE SX 18" today for $160. Never been installed or powered (not even holes in the surround where the screws go!) I'm wondering what the optimal box for low end output will be for this sub. I'm thinking 28-30hz tuning for decaf. I believe my usable cargo area with seats...