Since the Acoustic Elegance website no longer has the forum up, and that is where some of this info was able to be found (not shown on the product webpage for whatever reason??), here are the driver dimensional drawings so you will know OD, cutout and mounting depth.
Product Brand & Model: Pair of Acoustic Elegance sbp12
Condition of all items: Used always set gains with a smd dd1 working 10/10 cosmetic 8/10 scuffs around screw hols and magnet bottom plate.
Don't wait for custom ordered new ones from acoustic Elegance for months buy these already ready to...