Best Big Sub? or duals?


I just moved and my HT is a 25 x 30' room in the basement with concreat floors. My current sub a vandersteen is to musical and just not big enought to have any effects, I also have a 15" velodyne that just about cuts it but doesn't really shake the room and the sweet pot is to narrow, probably because of lack of power my old house this did great in. I am using all vandersteen speakers so they are really fast I need a good fast sub or two that will shake the room. Any sugestions cost is not a big issue just want to do it right and don't want to spend more than I have to.
programmergeek
REL is very good. I have just what you need for HT. A pair of Nelson Reed 1204s. They were designed by a California company for the movie industry to play back soundtracks at full volume in large spaces. They will reproduce 20 Hz at 120db levels. They use 4 12" Volt drivers on each channel, 2 forward facing and two facing back. The cabinets are large but not huge. I have the electronic crossover for them. When I used them on the cannons in the 1812 it would scare you. They were only used for a year or two before I moved into a smaller house and packed them up , where they have been the last 14 years. They were reviewed in Stereophile in the late 80s. I will sell them for$2900 with crossover, which is a fraction of the cost of building something like this now. The freight will be considerable , as they weigh 110lb each. I had intended to keep them but my present listening room will not hold them and I do not contemplate moving. There is info on them on line.
Parts-Express has the Titanic subs and a few of them use the Dayton Reference drivers.These probably aren't necessary ,due to being used strictly for HT.I use 2 subs,each with two of the Reference 10" and the IB woofers for LFE.They have on sale the D-dub kit for $320.These have 15" woofers mated to 240W plate amps.The Titanics are about $750 each,though they do have 1000W and a parametric EQ.
Is that the Nelson-Reed top of the line where he used ATC midrange in the mains and eight Volt 12" woofers in a pair of subs? I believe he claimed 120 db SPL at negligible distortion...WOW.
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