There is plenty of old discussion regarding one sub or two in the archives. Search on "need a subwoofer" and you should find a long thread.
The velodyne site has a chart of room szes measured by cubic feet. According to that, you need at least a 15". Two 12's = one 15 in output.
Contrary to what you usually hear, the Velodyne people say that their 15's and 18's are more accurate (all fast is good for) than the 10's and 12's for the DD range.
The velodyne site has a chart of room szes measured by cubic feet. According to that, you need at least a 15". Two 12's = one 15 in output.
Contrary to what you usually hear, the Velodyne people say that their 15's and 18's are more accurate (all fast is good for) than the 10's and 12's for the DD range.