Check out a sub like this Klipsch I use with KEF ls50’s:
https://www.klipsch.com/products/sw-308-subwoofer
Forward firing active driver + two passive radiators one firing left and one firing right. That provides some bass distribution benefits similar to multiple subs in an array but from a single compact box. Something to consider for those interested in the bass array concept but not fond of the idea of having to tackle multiple physical subs. Not the same thing but a step in that direction that is no harder than any other single box sub to set up. A "swarm" of 3 in 1 per se.
https://www.klipsch.com/products/sw-308-subwoofer
Forward firing active driver + two passive radiators one firing left and one firing right. That provides some bass distribution benefits similar to multiple subs in an array but from a single compact box. Something to consider for those interested in the bass array concept but not fond of the idea of having to tackle multiple physical subs. Not the same thing but a step in that direction that is no harder than any other single box sub to set up. A "swarm" of 3 in 1 per se.