I been researching, and reading review on KLIPSCH KSW-12 AND Velodyne DLS-4000R. from what I found both are good sub. If you guy have the choice Which SUB would you buy and Why.
Both are good subs. I have heard both as my local dealer has them both. I am friends with a guy that owns a medium size A/V store so I get to go in and play with everything. Even the biggest Klipsch he has which is huge will not out preform my SVS PB12+Ultra. I would make a call to SVSubs and talk to Ron and give him your room measurments and details. He will tell you exactly what you need and wont over sell you. I have had numerous subs over the years but so far I like the SVS the best, especially for movies.