Eh hem!...Subwoofers... What do ya know?

Subjectivity and personal taste aside, clearly there are those who simply haven't experienced the advancements of current Extra Low Frequency implementation and/or software design.

Even if your speakers are equipped with built in self powered subwoofers, in all likelihood those subs are not optimally placed within their environment to take full advantage of their integrational and presentation potential. Which is why their manufactures often demonstrate them in conjunction with outboard subwoofers. 

Wilson, Magico, Focal, etc. all produce subwoofers. Its not the novelty of loud bass. Its advanced adjustability of multiple ELF parameters and thier programable control. 

@millercarbon 4 subs is a no go for me. I live in an apartment after all. I did try to move the sub next to the couch and I feel like I have it so it integrates well and isn't apparent thats its next to the sitting position.

All in all it remedies most of the problem at the sitting position. I would really rather NOT have subs at all so I don't know. I haven't had time to sub crawl AND I'm also going to play with the height of the mains. These came with 24" tall stands but have a 3"+ front port that puts the tweeters way over my ears (bass is better standing also). I'm going to try putting them on 18" tall solid objects to see what happens.

THey make a lot of really good bass that may be hard to come by otherwise.

Hi all. I have a pair of REL Limited subs working quite well in my relatively small room.  Having read about the swarm has piqued my curiosity.  Do the sub-drivers need to be of the same size?  What's the smallest driver that will effectively work with the 12" woofers I am now using?
Thanks..

They dont have to be the same. So long as you have some sort of control over them.