Looking for Sub to pair with Dynaudio Confidence 20s

My Room is 13 x 19 I have had the confidence 20 speakers, and there was no need for a sub base. My room has a big picture window, hardwood floors with area rug. I also have some good room treatments. Very nice fast bold bass. Not sure what you have for an amp? I now have a set of confidence 30 Speakers, the base shakes my house. The difference between the 20 & the 30 speaker is huge. With the size of your room, you should buy a large floor stander.

to get a sub that can be subtle is probably a good approach. At least when you are not into shaking the room and your wig flying off

Thanks all! Open to new or used. <$5K

First, you want to get two subs not just one as the performance improvement is substantial.  For about $2100 you could get two SVS SB3000 subs that come with software that helps greatly with integration, and they offer a long trial including shipping both ways so no risk.

https://www.svsound.com/products/sb-3000
 

Or, for a little more $ and even better performance but with no integration software you could get a couple Rhythmik F12G subs…

https://www.rythmikaudio.com/F12G.html

Either way you’ll be in great shape.  Best of luck.

how about 2-REL t/7x or 2-REL t/9x subs? For 2 channel systems these are some of the best sounding subs in their price range.

REL is famous for easy implementation with a wide range of speakers using the high level inputs. REL has a 60 day home trial with free shipping. I owned REL from the early 2000’s with Totem speakers