Subs?

In my experience you have to spend upwards of $20,000 to get the kind of speaker that has nice 30Hz and below bass. Most do okay with 40 plus so for me a sub is a good addition. Even with much more expensive speakers that reach deeper I want a sub. YMMV

fastfreight +1

I have a nice 10” Rel (T/9i that works so well, I’ve not needed to shop further. 
when integrated properly they pressurize the room without making their presence known, by directionality nor boominess. 
 

Uh, yeah...I'd like to order one of those quantum drive ones with the gravity lance turret, the reality distortion sphere shields, and the probability beam unit.

Oh, Sorry.....wrong forum.....*blit*

Yes like many I recommend two subs or more if possible I listen to everything from Frank Sinatra too Odesza and I'm in my mid 70's I have two SVS Ultra 13 subs with the upgraded plate amps with DSP control My tower speakers also have built-in powered subs with gain control, so I'm assuming that it's like a bass array  All I know is when listen to my music I have no idea were the bass is coming from and trust me it sure can energize the room and l have the crossover set pretty low 

For sure not one sub.  It may make your system sound worse-it did for me. Two subs at a minimum, 4 being best.  As has been previously mentioned-the biggest effect of adding subs is how it cleans up the sonic clutter in your room. The second effect is a tighter more natural bass. The audiokinesis swarm is a great value and would likely work well with your speakers.  I had one in place for several years, until I realized my Magico S7's with 3 10" woofers each were running over the 4 10" subwoofers in the swarm. I switched to  4 B&W DB1D's and the improvement was astonishing.  If you don't go with the swarm, I would recommend that you chose a sub with DSP capabilities.  Again, at least 2 subs!