Experience with stacked subwoofers?

If you have decent speakers you only need one subwoofer maybe two.

It’s a gimmick from a marketing standpoint. Not sure how meaningful the changes and I’m not hearing much on what it does up above and there seems to be limited enthusiasm.

Why not Stack tweeters and mid range drivers.

I stack my dishes and silverware and that really works good.

@lonemountain 

Standing wave problem is overrated and most rooms don’t have this problem.  Lower bass waves are very long and permeate throughout the room quite well.

Also if you have decent main speakers for two stereo listening you shouldn't really need to have a subwoofer.  Fully endorse subwoofer or two for home theater, you want tanks to rumble your entire house when they move across the screen

These guys are marketing a change in the sound dynamics in a room. Exploiting human nature.  Just because you hear a change doesn't mean things are getting better.  So now what are we gonna start doing stacked mid range and tweeters??

All this Because main speakers are now this made with smaller diameter bass drivers.