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
@bstatmeister  I'll try to answer your questions as clearly as I am able.  The "pigtail" is the interconnect cable coming out of the M5-HP.  You plug your preamp main out interconnect in the one side of the rectangular M5-HP and then the "pigtail" end plugs into the input jacks on the back of your power amplifier.  Before doing all of that plugging in, you need to open the crossover box and find the tiny "dip switches"  In my case my amp has a 100k ohm input impedance.  I have my M5-HP set at one setting below that which is 75k.  The manual suggests that you try to the actual input impedance setting of your amp and one below, I believe.  For me, that one step below gave me the most seamless integration of the subwoofers into my system.

Hope this helps!

PS  I would take the Samson out and use unbalanced cables.  If you need to purchase a good pair of cables, they are around including, of course, here on Audiogon.
i would be inclined to run single ended get converters out of tge way..
Conrad Johnson and many, many others do magical things with SE

there are two versions of the 5 filter with different DIP switch, I believe 6-8 or 8-10 positions
more DIP positions indicate a more recent filter but a quick call to Hanford, or competent dealer would tell ya, both are perfectly good
the AQ Fire cables are very good, SKY is better but we are talking small stuff here and that assumes you have Sky level cables elsewhere.....
Now I remember why I have the samson s-convert. My amp does not support RCA Jack's. Just TS or XLR. I suppose I could buy a plug that converts RCA to TS and give that a whirl?

     If one wanted the finest signal integrity and purity for optimum performance from a music based 2-ch system, is it beneficial to use an amp with non-standard connections,  use multiple connector type adapters and use an external crossover with multiple signal affecting dip switches?
     
     I think we all know the answer to this, right?

Tim
@noble100   Agree with you that adapters should be avoided but the M5-HP is remarkably transparent.  An important thing to keep in mind is the effect of freeing your main amp from having to produce deep bass.  The treble and midrange open up with more dynamic flow without giving up first class deep bass that the Vandys produce.