the Def Tech subs are better than any of those you mention and match your mains very well, and yes I have heard them all, and owned and loved the SVS Ultra's very much.
I am shocked you need more bass? Could be the room, the Def Tech 7002's go VERY low. When I had the 7004's in a home theater, the Velodyne DD 15 measured them down to 22 hrz when I set them up together. I moved the Velodyne to a 2 channel system, because it was really unessisary in that system.
I am shocked you need more bass? Could be the room, the Def Tech 7002's go VERY low. When I had the 7004's in a home theater, the Velodyne DD 15 measured them down to 22 hrz when I set them up together. I moved the Velodyne to a 2 channel system, because it was really unessisary in that system.