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

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. 

So I took the mains off their stands and put them on top of some weights. They are about 1 foot off the ground now. Sound is warmer but still not getting that low bass “bump”. If I stand up and put my head right above my head sitting there it is.

what I can’t get my head around is what the couch is doing to make this happen. I pushed the couch out of the way and there it is. Seems like it should be the other way around. The couch is against a flimsy metal frame table that’s 12” deep which then is sandwiched against the rear wall. Could that cavity somehow be adding to things?

Edit; moved the now lower stand speakers back 8” or so and now im
gettijg better bass. The imaging isn’t as good so that sucks. My speakers are -6db at 50hz but are really -6 for everything below 110hz and front ported. Now I’m more curious about a 40hz rear ported speaker would do. Hmmmm.

i now better understand the subwoofer’s role in things. Being able to bring my mains out 25” from the back wall (rear of speaker) and have the sub make up the bass I lose allowing the imaging that comes with being out into the room is cool.

Dont sacrifice any imaging . Your bass response is what it is. If its not good enough to your liking , go to the store. Dial your imaging the best it can be. 

@davekayc most likely no New speakers for me in 2020. Probably put the sub back in and make the best of it.

its all I can do