Vandersteen Sub woofers v Rythmik Subs


I really love the idea of the Vandersteen Subs where they are connected with the mains via extra speaker cable off right and left channels off the main amplifier, which is supposed to provide better bass transition from the mains while keeping the signature from the main amplifier. My question is with Vandersteen coming out with the SUB THREE and the price going significantly higher, I was wondering if there are other subs for less that you could integrate in the same way. (Most subs seem to rely on the line level input which is just a sub-woofer RCA going from the pre-amp to the amp on the sub). Can this same Vandersteen set-up be achieved with other subs?
I picked Rythmik since they are known (in the home theater community anyway) for being one of the best bang for the buck subs and the most "musical" of the bunch. (between Hsu, SVS, PSA).
And could I possibly achieve even greater sub-woofer nirvana since I could get an 18" for around $1500? Vandies only have 3 eight inchers.

I am a Vandersteen fanboy and I would like to support RV whenever I can, but don’t know much about my other sub-woofer options so looking for some feedback. Doesn’t even have to be related to Rythmik necessarily. If you know of other subs that can integrate the same way I want to know about it!

Thanks
bstatmeister
wolf - As I commented, the REL has some things in common with the Vandersteen subs, but some prefer the HP filter option with their main speakers for a variety of reasons.  For those folks, the REL is not a good option.
Hi tyray,

     Sorry about detonating your gray matter, I hope it wasn't too painful.  I think, if you just stuff the blown out bits back in your cranium, you should be fine.
     Good bass response is harder to attain in most rooms than good mid-range and treble response.mainly because bass sound waves are extremely long (with deep bass sound waves often being longer than any dimension in your room) while mid-range and treble sound waves are much shorter and more directional.  
     Good mid-range and treble response can usually be attained at a specified listening position by properly positioning your main l+r main speakers and utilizing wall treatments at the first reflection points.  
     In my experience, a distributed bass array system is definitely the best method for optimizing bass response in a given room.  Butt I believe it's still possible for you to get good bass response results in your room by using your single SVS sub as long as you only want to optimize the bass response at a single listening position.
     This can be done using the following method:
1. Hookup your sub and place it at your desired listening position.
2. Play music that has good and repetitive bass.
3. Walk around your room in a systematic manner listening for an exact spot where the bass sounds the best to you.
4. Once this spot is located, reposition your sub to this exact spot.
5. To test results, sit at your designated listening position and repay the same music.
     As you would expect, bass response will be improved as additional subs are added to the room. Of course, there's a practical limit to the acceptable number of subs in a room.  Scientific experiments have consistently proven that  measured in-room bass response only improves marginally beyond the use of 4 subs in a room. 
     This is the reason the Audio Kinesis Swarm system consists of 4 subs.  You could start with your single SVS sub and add subs if you felt the need. I'd suggest following the positioning method I described above for each sub added.

Good luck,
 Tim  
     
Richard Vandersteen agrees "the more subs the merrier.....however, if only one....I'd Vandersteen it.
Richard Vandersteen agrees "the more subs the merrier.....however, if only one....I'd Vandersteen it. 

Yeah, I figured I'd probably need to RV it to get what I want (and I also have the 2C's so would be a great match all the way around) I just thought I would put the feelers out in case there were any other musical subs that could get me the same type of sound/integration without having to spend so much. RV is hard on my wallet!