Shallow-Mount Subwoofers

[454Casull 10+ year member]

Magnet thickness has extremely little to do with motor force. In fact, for a given amount of magnet material, you're better off making it as wide and thin as possible. Doubling the thickness of the magnet MAY get you 5-6% more motor force, if you're lucky... It just doesn't pay off to make them thick in the hopes of a stronger motor.
Thick magnets are used for two reasons: internal clearance (cheaper to use than steel) so the voice coil doesn't bang on the back plate, and looks.

Dan Wiggins

Adire Audio

Why are you even bothering to answer him?

Then again, you're probably too busy to read this board all the time.