Subs seem to get a bad rap because they are almost never integrated properly. It is crucial to get them time aligned with the main signal.
You need a sub with continuous phase adjustment. And the right method for adjusting it.
http://www.theabsolutesound.com/articles/subwoofer-basics/?page=3
If you do manage to get bass output for your room, by whatever method,
you will have room modes. The average bass trap doesn’t work very well. Easiest way to manage modes is to get a sub with auto EQ. Just knock down one or two modal frequencies and you are good to go. I feel sorry for my purist friends who have do without bass because subs are not a part of their religion. Listen to the JL Audio Fathoms properly adjusted and you will want to change religions. They aren’t cheap but, considering all the $$$ you’ve put into the rest of your system, to do without such an essential component of true SQ is a tragedy IMHO. Dogma is a b----
You need a sub with continuous phase adjustment. And the right method for adjusting it.
http://www.theabsolutesound.com/articles/subwoofer-basics/?page=3
If you do manage to get bass output for your room, by whatever method,
you will have room modes. The average bass trap doesn’t work very well. Easiest way to manage modes is to get a sub with auto EQ. Just knock down one or two modal frequencies and you are good to go. I feel sorry for my purist friends who have do without bass because subs are not a part of their religion. Listen to the JL Audio Fathoms properly adjusted and you will want to change religions. They aren’t cheap but, considering all the $$$ you’ve put into the rest of your system, to do without such an essential component of true SQ is a tragedy IMHO. Dogma is a b----