Driver for close box - pure sound quality of bass

Hi to all.
I found a local craftsman, he makes quality subwoofers, closed cabinet, MFB, amplifier. But he assures that the best music drivers currently in production are SB Acoustic.
I looked - there are a lot of positive reviews. SB42FHCL75-6 .
What I need is a low-frequency driver, musical, in my understanding it does not require much power, a light moving system, a powerful magnet. Acoustic design - only a closed box. Sealed. Possibly isobaric.
Box sizes are almost any . Up to 1700 L.
Budget is flexible.
I went through the search, most often came across the following recommendations:

Acoustic Elegance
Stereo Integrity
TC Sounds (RIP)
Fane Colossus 24'' (i`m finding topic here, 550 L box is enough for him)
SUPRAVOX 400
Hartley 224HS (someone claims that he has a better sub-bass in terms of music than everyone else, but they listened either in the transmission line or in the horn, from 1100 liters )
I found a topic here by searching, a person put them in a box of 550 liters.
Clarion 8000 (preference to vented)
EV 30W (preference to vented)
Fostex 800 (preference to vented)
Cabasse nds 55 (very rare)

From the world of car audio also come across
Cerwin Vega stroker 24" (old school)
Hertz Air 5400 (European old school)
Hertz Mille 5400D (European old school)
Magnat Aggressor 6000 (too same like a Vintage 990) (European old school)
Legatia 18
JL Audio 18W6 (old school)

Also looked at JL Audio 13W7 , but the search showed that in a direct comparison, everyone preferred IDMAX - i`m finded Image Dynamics IDMax15 V4 .

I have already been advised by the Harbottle Audio driver.
But I am confused by the weight of the moving system in over 1 kilogram for 24 drivers.
They also advised me 4 pieces of subwoofers, instead of one huge one, I know about at least one positive experience in this area, but it will be later, for a start I need one. And I need to select a driver.

Please any opinions?
 
The mentioned driver looks very interesting according the parameters in the datasheet under
https://sbacoustics.com/wp-content/uploads/2020/03/15in-SB42FHCL75-6.pdf
especially for large volume
My favorite drivers several years ago, as I make subwoofer with large volume was first McCauley and Focal (Audiom 12ax/15ax) and later I discover the brand https://www.precision-devices.com
for very good results - e. g. PD2150 in post #1 and #5 under
https://www.diyaudio.com/community/...oofer-precision-devices-pd2150-inside.197034/
and PD184 (6 pcs) in post #15 and first image in post #1 under
https://www.diyaudio.com/community/...sent-inwall-subwoofer-esl-or-dynamicl.194386/
After posting the thread under
https://www.diyaudio.com/community/...r-drivers-transducers-subwoofer-beast.164142/
some guys recommend, that I should avoid larger diameters than 21" - and when a larger membrane area is desired, prefer the using several 15" and 18" drivers.
My formerly, no longer exist website you will find still under the webarchive:
https://web.archive.org/web/20080201072713/http://www.tiefbasswiedergabe.de/
https://web.archive.org/web/20080801000000*/www.tiefbassuebertragung.de
 
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The mentioned driver looks very interesting according the parameters in the datasheet under
https://sbacoustics.com/wp-content/uploads/2020/03/15in-SB42FHCL75-6.pdf
especially for large volume
My favorite drivers several years ago, as I make subwoofer with large volume was first McCauley and Focal (Audiom 12ax/15ax) and later I discover the brand https://www.precision-devices.com
for very good results - e. g. PD2150 in post #1 and #5 under
https://www.diyaudio.com/community/...oofer-precision-devices-pd2150-inside.197034/
and PD184 (6 pcs) in post #15 and first image in post #1 under
https://www.diyaudio.com/community/...sent-inwall-subwoofer-esl-or-dynamicl.194386/
After posting the thread under
https://www.diyaudio.com/community/...r-drivers-transducers-subwoofer-beast.164142/
some guys recommend, that I should avoid larger diameters than 21" - and when a larger membrane area is desired, prefer the using several 15" and 18" drivers.
My formerly, no longer exist website you will find still under the webarchive:
https://web.archive.org/web/20080201072713/http://www.tiefbasswiedergabe.de/
https://web.archive.org/web/20080801000000*/www.tiefbassuebertragung.de

Thank you for posting this info.

With respect to your earlier thread here

https://www.diyaudio.com/community/...equipped-with-2-pcs-focal-audiom-15ax.274159/

Have you come to any conclusions as to which driver(s) you would consider for a 1000-1500 litre subwoofer enclosure described in the thread above?

Thanks,

Simon
 
+1 for sb acoustic/audience esp. what you get for the price.
I have tried below drivers and each one surprised me in their own way for the money.
18SW450 18" subwoofer
Sb34swpl76 12" subwoofer
SB29NRX75-6 10" woofer
Sb26adc tweeter
Sb19st tweeter.
Sb13pfcr25 4" Woofer