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

@deep_333 DS1200 maybe is ok, I will read about it again, thank you. I’m not sure why, but I never considered Elac as a part of my system. Are you sure KC92 will work like 12"?

@iad They are both very refined subs (high quality drivers, etc), but the KC92 wouldn’t keep up with the DS1200’s output, of course. If your room’s not too big and listening levels are not that high, you can get away with the KEF.

Personally, I would recommend the Varro DS1000 with the dual 10inch force balanced drivers for your Buchardt speakers and room size. Don’t be fooled that they are 10 inch drivers. It hits below 20 hz like a champion/gets you in the infrasonic zone, if needed.

The Varro subs come with a very useful auto PEQ tool developed during Andrew Jones’ tenure that will try to match the sub’s nearfield response (i.e., before the room got in the picture) to your listening position. You still need to not put the sub in a decent location. But, it can help out guys with purist rigs or others who may not know how to integrate subs too well.

@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.