I'm guessing this subwoofer is to be used in a two channel music system?
Multiple subs will defiantly load or pressurize and reduce or eliminate room nodes within a listening environment better than one. With proper placement and equalization you should find very enjoyable performance at your listening position.
Regarding your budget I suggest you look into Syzygy Acoustics.
http://syzygyacoustics.com/#
Unfortunately, their site doesn't seem to offer their manual for the possibility of slaving your current 12d from the remote controlled room corrected Syzygy or running two of their 8" models. I'm sure they'ed be happy to answer your questions.
In my opinion room correction is far more valuable than giant driver size.
Good luck with your search and have fun.
Multiple subs will defiantly load or pressurize and reduce or eliminate room nodes within a listening environment better than one. With proper placement and equalization you should find very enjoyable performance at your listening position.
Regarding your budget I suggest you look into Syzygy Acoustics.
http://syzygyacoustics.com/#
Unfortunately, their site doesn't seem to offer their manual for the possibility of slaving your current 12d from the remote controlled room corrected Syzygy or running two of their 8" models. I'm sure they'ed be happy to answer your questions.
In my opinion room correction is far more valuable than giant driver size.
Good luck with your search and have fun.