eminence kappa pro 15 LF will probably work well, but check you can get the driver in with the doors on, as they are not slim neodymium magnets

awesome nicely done

good job but need to know if i make a pair will it sustain 4 projection bass bins cos lm having trouble with recovering my mid-range after makin 4 projector bass bins with P audio sd18" speaker .lm thinking of making X-TRO but with one 15' speaker not two has any made one with one 15' speaker yet