@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.