2012 Frame / Cone -- First Built Woofer

[sundownz 197]

Prototype motor paired with new 12" frame, 9.25" spider (what we use on Z v.3 18s now), and the new cone / surround. I literally JUST finished it so I cannot play it until tomorrow. That being said... it won't QUITE be able to use ALL of the clearance we have -- and that is great -- should be INCREDIBLY rugged and hard to damage :thumbsup:

For those not current on all of these parts -- they are ALL prototype parts. They are not in production yet. Production parts will start appearing 1Q 2013.

[ImBob 2]

The future looks...intimidating

[kkk4 3]

video!!!!!!!!!!!!!!!!!!!!!!!!

I am amazed!

[gss 11]

on the must have list

[sundownz 197]

I did get a little too happy with it last night when I first fired it up -- you'll hear a small metallic sound because of some slight damage I did to it then (woops!). Either way I was still able to get a good test out of it for this video and show it in action -- with more testing to come as we get more prototypes together. The good news is I'll be able to make it even tougher on production thanks to my mistake =)

[kkk4 3]

these cones, only on Z.v4 will be mounted?

in the video you mounted the coil of z.v3 ? (ex Nightshade v.1 ?), or nightshade v.2 coil?

beautiful this prototype

[sundownz 197]

The Z v.3 and Z v.4 coil are the same winding length.

[OuTLaWeD 110]

absolute beast! wow that thing looks incredible

[sundownz 197]

I am kicking myself a bit for getting crazy last night with it, haha... what I did was push it hard enough to exit the coil completely from the gap by a large amount -- the 12" frame supports 50mm of one-way travel not counting frame thickness... 59mm with frame thickness... and 71mm with vent spacer thickness added -- minus 8mm for triple joint ring so we can go 63mm one-way before bottoming the ring... and we have 62.5mm in the motor... so I had it up around 60mm one-way (which is actually 5mm PAST surround linearity)... which makes the coil about 1/2" past the gap *laughs*

So when it came back down it knicked the top plate and knocked loose 1/2 of one voice coil (the coil is an 8-layer bifilar which is wound as a quad; so you can knock out 1/2 of a coil by breaking one wire) and this wire is rubbing on the top plate now making that metallic sound (I can see the loose wire through the vent spacer -- WOOPS!!!).

Either way I have some ideas to minimize that possibility; although, I must admit, I was being totally careless with it to do that!

Needless to say it was pretty crazy and just me being too happy with my new toy

[OuTLaWeD 110]

it's always good to push something to it's breaking point so you know it's weakness. that is one hell of a "toy" though

[sundownz 197]

Few more photos this morning compared to other Z model woofers :

[sundownz 197]

I am kicking myself a bit for getting crazy last night with it' date=' haha... what I did was push it hard enough to exit the coil completely from the gap by a large amount -- the 12" frame supports 50mm of one-way travel not counting frame thickness... 59mm with frame thickness... and 71mm with vent spacer thickness added -- minus 8mm for triple joint ring so we can go 63mm one-way before bottoming the ring... and we have 62.5mm in the motor... so I had it up around 60mm one-way (which is actually 5mm PAST surround linearity)... which makes the coil about 1/2" past the gap *laughs*

So when it came back down it knicked the top plate and knocked loose 1/2 of one voice coil (the coil is an 8-layer bifilar which is wound as a quad; so you can knock out 1/2 of a coil by breaking one wire) and this wire is rubbing on the top plate now making that metallic sound (I can see the loose wire through the vent spacer -- WOOPS!!!).

Either way I have some ideas to minimize that possibility; although, I must admit, I was being totally careless with it to do that!

Needless to say it was pretty crazy and just me being too happy with my new toy [img']http://www.caraudioclassifieds.org/forum/images/smilies/smiley.gif

Here is the wire I knocked loose -- you can see it through the vent. The piece hanging off is the part after the connection is cut so I can still play the driver (eg: not shorting out on the motor).

Coils of this type have four windings -- I broke just one so I am running on "one and a half" coils in the video.

[stealth 113]

nice!!!! cant wait to see a Beast proto.

[sundownz 197]

I have noted some doubt on whether all of these new parts will be of major benefit (not in this thread, of course, but I do see alot of things around the internet) -- what I say to that is; stay tuned for the results !

[OuTLaWeD 110]

i have absolutely no doubt in my mind that this is going to be an incredible sub. really something that hasn't been achieved before. i got a boner

[Shogen 325]

Looks insane!

[swift 501]

Wow is all I can say. I can only imagine the lows from a pair or 3 or 4 18's. haha

[sundownz 197]

Despite the damaged coil I was able to pull specs then estimate where they would rest with a fully functional coil (as I have data from the 10" model to fill in the blanks that are not size dependent) -- 12" D1 model.

Re : 1.65 series

Fs : ~25.75 Hz

Qes : ~0.296

Qms : ~4.16

Qts : ~0.276

Le : ~1.8 mH

Sd : 457 cm^2

BL : ~17.23

Mms : 329 g

Cms : 115 uM/N

Sens : ~85.01 dB

BL^2/ RE : ~180 (D1 coils are usually a hair higher than D2; but for estimation purposes I used the same as the D2 coil)

So these are estimated based on the known specs and specs from the 10" D2 -- gives us a good idea.

As I mentioned in the 10" thread I may need to add more stiffness into the surround to get the specs to lay where I want them -- realistically I'd like to see the Fs into the low to mid 30s on the stock format driver. You will note that the CMS is higher than the 10" model as the spiders and surrounds get a bit softer as their size increases; thus we have an even LOWER Q figure on a 12" than we do on a 10" model -- on the Z v.3 the surrounds compensated by also getting stiffer as size increased (the 18" Z v.3surround is very stiff) -- so I'll have to do the same on the new surrounds.

So more testing will be getting done with some surround tweaks