I read that these particular drivers were used as pairs in MK MX 'Push-Pull Dual Woofer' subwoofers.
This information leads me to the MK MX 350 described in this link: Product Review - MK Sound S-150THX, MX-350 MKII THX Ultra Subwoofer
You can see the two 12" drivers in this attachment:
This information leads me to the MK MX 350 described in this link: Product Review - MK Sound S-150THX, MX-350 MKII THX Ultra Subwoofer
You can see the two 12" drivers in this attachment:
Attachments
As always, without knowledge of the T/S parameters, it's impossible to say what enclosure would suit one of those 12" woofers on its own.
It's time to introduce you to understanding loudspeaker data!
Understanding Loudspeaker Data | Eminence Speaker
It's time to introduce you to understanding loudspeaker data!
Understanding Loudspeaker Data | Eminence Speaker