I wish you would stop saying some subs are "too slow" bo1972. Bass is slow because it is supposed to be. I can almost guarantee if the bass is tight and fast it's because the sub is not going down to it's desired frequency. When's the last time you heard a 10' kettle drum or an acoustic bass?
Another thing. All audio components have limitations. Everything built has some limitation. A sub that works up to 120hz is easy. Making one work at 15hz is harder.
Another thing. All audio components have limitations. Everything built has some limitation. A sub that works up to 120hz is easy. Making one work at 15hz is harder.