Subwoofer designs w multiple woofers - what benefits?

[Foodie]

*Reposting this as it was lost in the website glitch.

For discussion and learning purposes.

Many sound system brands offer these subwoofer designs. There must be benefits but consumers like us may not know the  benefits

Talking about (not multiple subs) the following sub designs:

1) dual driver sub design which have its 2 woofers dual opposed in the same cabinet; e.g. rythmik g22, kef's new subs range

2) dual driver sub design that has its woofers face different directions but not opposing directions in same cabinet. e.g. Ken kreisel dxd1202, MK's mx subs, arendal 1723

3) Sub design that have 3 drivers in the same cabinet (eg 1 active and 2 passive woofers). E.g. Dali P10DDS, starkesound SUB35

Besides smaller form factor for same output, what are the benefits that these designs bring compared to single bigger woofer subs on the below areas?
- bass performance
- distortion
- bass coverage in the room
- seat to seat consistency for freq below 200hz
- tactile feel on the body/ particle movement

 

[Foodie]

I volunteer to start the ball rolling !

**1) dual driver sub design which have its 2 woofers dual opposed in the same cabinet; e.g. rythmik g22, kef's new subs range**

*Distortion*
From rythmik: dual opposed subwoofers mount two drivers on opposite walls of enclosures in an effort to reduce the reaction force exerted onto the enclsoure from drivers.

From kef: it places two drivers in a dual-opposing configuration?that is, mounted on opposite sides of a cabinet. They vibrate in phase with each other, moving inward and outward in unison. The force imparted to the cabinet from each woofer cancels out the force from the other woofer. This greatly reduces cabinet resonance, which can distort the sound, and prevents smaller subs from ?dancing? across the floor.

In a way, this reduces distortion caused by cabinet shaking?

*Seat to seat consistency for freq below 200hz:*
The data bass article below is quite interesting. It suggests better seat to seat bass consistency below 200hz in a room? Backed up by measurements.any truth to this?

https://data-bass.com/#/articles/5cb4eb62079a580004e73249?_k=0ph329

Tactile feel on the body/ particle movement
My guess is - there is more particle velocity movement across the room compared to 1 sub? Any thoughts /views?