Rythmik Audio F12/F12-400 vs JL Audio E-Sub e112

@deep_333 for the price that DS1200/1000 sells for, there is also Martin Logan Dynamo 1100X, which I find very interesting because of Anthem room correction system it has. But they all are over budjet unfortunately. 

Very happy with my Rythmic F12SE. Very musical. 

@harpo75: Excellent! Now consider using a pair of the Rythmik Audio/GR Research OB/Dipole Subs in place of the woofers in the ET LFT-8b! The OB Sub can play up to 300Hz (the ET's dynamic woofers are used up to 170Hz), and will turn the LFT-8b into a completely dipole loudspeaker.

It's easy: just leave the stock woofers unconnected at the binding post terminals, and use the controls on the Rythmik A370 plate amp as your low-pass crossover filter..The OB sub contains either two or three (your choice) 12" woofers, and is a remarkable woofer system. You can use your F12's as well, for a DIY "swarm" low frequency system.

I have the Rythmik F12G and am very happy with it. Tuning it to my system was  easy. I just have it filling in the bottom end and don't have it set overly loud. Blends in very well for music. I don't need a second sub in my room.  

Yes bdp24, I’ve looked at switching to OB several times but finances have always stopped me from moving forward on this.  A pair of triple 12” (which is what I’d want) OB which a wood kit, etc is about twice as much as I paid for the Rythmik’s.  At the time I purchased them I was still “in the business” and got a bit a discount.
I have tried running the Rythmik’s with the crossover set all the way up and disconnected the woofer in the ET’s (like someone in an OB forum suggested ) but there’s a noticeable hole so doesn’t work the same as an OB setup would.  

I have heard full OB systems and they are incredible!  The most impressive system I’ve ever heard (and I was going to CES, in the business since the early 80’s) was a full OB system with dual subs consisting of four 12” drivers and the NX Ottica speakers.  Driven by a custom made 50 wpc Nelson Pass style amp.  It was just so clean and full sounding.  Takes a lot to amaze me but I loved it!  I know what I eventually want to build for a system but will be a long while.  Will probably start with the triple OB subs first, sell my Rythmik’s and be happy for a while (until my wife forgets) then eventually get some OB full range sets.