Are there any 12" subs being built with 4" voice coils?

[hispls 5,000+ posts]

I think some Shocker subs have 4" coil

Nope. They played with 4" coils on prototypes (basically TRF motor/TC 4hp), but found that the efficiency of 3" was worth more than the added power handling of 4".

The reason most companies don't do a production 4" coil on a 12" is that with most off-the-shelf baskets you lose a bit of excursion with standard 8" spider.

Plenty of 3" coil subs that would take the 2500D if you're careful, and really 2500 is fully capable of blowing up a 4" coil.

 

[Liquid Bass 10+ year member]

^ glad to hook ya up
no 4" 4 layer coil will take 5krms clamped.

a rms rating means that power constant for 20+ mins nonstop

So a super heavyweight wont take 5k?

 

[pr-festiva 10+ year member]

ive got a hinor kompressor 12 with a 4" coil, going to strap a pair of AQ 2200's to it in the rex