my new BEAST!!!!

Who said it had a stronger motor , this is the sticky from this forum
RE: 2.22 ohms

BL: 24.86 NA

BL^2/RE: 278 (nice!)

A standard 9" diameter SPL motor with 8-layer 3" coil typically has 150-200 BL^2/RE... so this thing is strong.

Only thing I have stronger is the Monster prototype (10" slugs and 12-layer coil) @ 360 but the coil is 50% heavier than the Warden and also a 42mm WW so has less excursion.

- Jacob

These are the T/S parameters for the 3" coil APXX and APX 18's,(i posted the 3" coil specs for a more apples to apples comparision)

The APXX18D1

Revc - 2 ohms

Bl 26.88

Bl^2/RE -361.27

APX18Q2

Revc - 8.00 ohms

Bl -41.30

Bl^2/RE -213.12

and I know he's refering to a 21" Warden versus an 18" APXX, but cone area and excursion would be the only thing that would even the 2 up, and I have competed with the 21" Warden for the last 2 years, and i am a dealer for both Atomic and Incriminator audio, they are both awesome drivers but like I posted before in real world applications they are pretty **** close, in some cases I would prefer one over the other, but to just say one owns the other is incorrect
no fair... my apxx has a 4 inch coil with a 12 inch motor...

 
Also to be considered is MMS... divide BL^2/RE by MMS and you get a figure that is typically less than 1

Assuming both woofers have the same style of spider and an FS about the same this figure can predict SPL very well... for example if you ended up with 0.5 on one woofer and 0.75 on the second woofer; the 0.75 woofer could be as much as 1.5 dB louder.

Again... this assumes a few things about the suspension and FS. If one driver has an fs of 35 Hz and the other an fs of 60 hz then the result will not be very useful... or if one woofer has a highly parabolic CMS curve and the other sub has a flat curve this will also throw things way off once they start moving.

You can get a HUGE BL^2/RE using, for example, an 8-layer copper coil -- but the gigantic MMS will likely cancel out all the gains in motor power and then some.

The Warden, especially since IA revised the coil to a 4-layer, has a very reasonable moving mass.

 
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