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 for the replies!

@tomic601 Jim, The NAD has the crossovers listed as “Main Frequency” and “Sub Frequency” on page 12 (Speaker Setup) of the manual:


Steve - M12 is a feature laden beast for sure, my eyes glazed over by page 12.

short answer is yes, use high pass built into M12 . I don’t have any insight into how phase correct so steeper slope’s probably better. Key will be experimenting and listening. I would download vandertones ( free test tones on Vandy website ) . That will help you pinpoint room modes and ameliorate w placement, tweaked to crossover freq and as I mentioned in prior post partial swarm w purposefully choosing overlap.


So I did look at some of the Rythmic models on their website, and appears that the speaker level inputs are standard speaker level inputs.  This is completely different than the Vandy design.  The plate amp on the Vandy sub has a very high resistance rating, so it draws no power from the amp.  But the Vandy sub amp has a built in first order roll up beginning at 80 Hz.  The crossover you insert between the preamp and the main amp has a corresponding roll off, first order.  So, while you could set up a Rythmic sub to mimic this feature, you are not connecting the mains and the speaker level inputs to the same main amp tap like with the Vandy sub.  IMHO, that's where the magic happens.

I have heard of the rythmic method before. Maybe it was in one of @tubebuffer  posts?

I have an older Vandy 2<something> subwoofer, and it seems to work fine.