Benefits of V loading drivers in subs?

The designs that were shared previously, obviously don't save space. You even need bigger dimensions if you want to keep the same rear chamber volume. Depending on the cavity you wille get some extra gain but mostly >90 Hz. If you go for designs like the SB1000 or the newer BA X28 (for example) you gain a smaller frontal area but need more depth to counter the loss in rear chamber volume.

VECTORDJ wrote: ...I believe the V adds a small amount of a horn effect. VECTORSONICS

It's rather a bandpass effect, but yeah, definately some effect ( not dramatic ) on respons higher up.
How much and where depends on 'port" opening, "enclosed" volume.
When speakers are mounted fairly hard inwarths and "enclosed" volume is substantial, you could need to take some dB in account regarding crossoverpoints, so "acoustical" crossover sits where it needs to be.

APC321 wrote: The attached documentation for the Court Acoustics 2 x 18" sub claims some benefits of the v baffle loading. https://ibb.co/WxjMNj3

They totally fail to explain what that benefit is.
"based on rear folded horns like 4520" .. not even close.
Lots of words, seems all very logical, especially to an uneducated newbie,
but no factual substance whatsoever.
Way too much sauce of the marketting spin variant

There is a moderate ( some dB ) bandpass effect from a "V-bafffle" arrangement, but it usually sits mostly outside the useable range of a subwoofer and must be taken into account when setting up the crossover with kicks, (low)mids or tops. It will certainly not make for more low-end SPL, maybe aid a little bit those kick, (low)mids, etc. Whether that's a benefit to chase after or not, depends on the ability of those kicks, etc..  to do their bottom end with authority or not. Other than that, I see a V-baffle arrangement only as a way to stuff more/bigger speakers in a cabinet with less frontal surface than straight BR flat mounted speakers at the expense of a somewhat bigger cabinet in total.

Phil B wrote: The designer of the Noise Control VSB218s ( Reay) told me he wasn't interested in any horn loading etc, it was more that the V baffle makes the box stronger and you can separate the chambers easily if that's what you want to ?? I kinda agree ! .p.

Would there be any hornloading effect if the port was in the middle of the v baffle? Almost acting as a large flared port or would the length of the 'v' be too short to add noticeable improvement?