Subs FS same as my car's peak.

[hispls 5,000+ posts]

Made some new 12's today I'm very happy with, but they have FS of 55hz. They sound quite good in a large, somewhat low tuned box, but thinking of SPL box application I see high impedence being an issue though I think there must be some opportunity for efficiency here somewhere.

Anyone have any experience with this?

Click to read more...

 

[RangerDangerV2 5,000+ posts]

smaller box with more port?? might do the trick...

 

[Buck 5,000+ posts]

What's the Qts?

 

---------- Post added at 09:41 PM ---------- Previous post was at 09:41 PM ----------

 

And Vas while we're at it?

 

[groundpound4200 5,000+ posts]

.5 cubes sealed should do the trick for max spl //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[Falcons 5,000+ posts]

.5 cubes sealed should do the trick for max spl //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

This brought the lulz. I needed that thanks haha

 

[CAT MAN 5,000+ posts]

@TaylorFade

 

[hispls 5,000+ posts]

What's the Qts? 

---------- Post added at 09:41 PM ---------- Previous post was at 09:41 PM ----------

 

And Vas while we're at it?

* f(s)= 55.18 Hz

* R(e)= 6.10 Ohms

* Z(max)= 29.10 Ohms

* Q(ms)= 2.649

* Q(es)= 0.703

* Q(ts)= 0.555

* V(as)= 20.580 liters (0.727 cubic feet)

* L(e)= 3.47 mH

* n(0)= 0.47 %

* SPL= 88.81 1W/1m

* M(ms)= 213.40 grams

* C(ms)= 0.04 mm/N

* BL= 25.35

I expect Fs, Qms and Qts to shift a little bit as the suspension loosens up, but in theory I can change compliance with different softparts

 

[Buck 5,000+ posts]

What woofer is this?

 

[ciaonzo 5,000+ posts]

Surprised to see Qes sitting at .7 while BL is at a pretty respectable 25ish.

 

[hispls 5,000+ posts]

What woofer is this?

Shocker Sig Neo using new dual 3 ohm copper Sig coil, Hawley cone and 3 spiders

 

[hispls 5,000+ posts]

Surprised to see Qes sitting at .7 while BL is at a pretty respectable 25ish.

Something about this neo motor... this was an 18" I did with the dual 2.8 ohm Aluminum and very stiff suspension:

Fs 45.09 [Hz]

Zm 21.64 [Ohms]

BL 22.81 [N/A]

Qms 2.897

Qes 0.984

Qts 0.735

Vas 113.900 [liters]

L10k 2.86 [mH]

n0 1.01 [%]

dBSPL 92.15 [1W/1m]

Ms 329.30 [grams]

Cms 0.04 [mm/N]

Qes and Qts are generally very low with ceramic sig.

 

[ciaonzo 5,000+ posts]

Interesting. Yeah, Qes/Qts should be insanely low, all things being equal. Seems like either you could fit more layers in the gap or the motor needs a chargin'.

Or maybe that's jes how it is, lol.

 

[hispls 5,000+ posts]

Interesting. Yeah, Qes/Qts should be insanely low, all things being equal. Seems like either you could fit more layers in the gap or the motor needs a chargin'.
Or maybe that's jes how it is, lol.

Gap is tighter than a 12 year old's shoelaces and if you ever tried to remove something ferrous that was stuck to these motors you wouldn't question the integrity of the neo....really even assuming the neo lost 80% of it's strength it would still have as much magnetic force as the ceramic sig.

Just how it is I think, these motors give some wild specs with aluminum coils as well.

 

[05trailblazer 10+ year member]

pics of sub!

 

[ciaonzo 5,000+ posts]

Gap is tighter than a 12 year old's shoelaces and if you ever tried to remove something ferrous that was stuck to these motors you wouldn't question the integrity of the neo....really even assuming the neo lost 80% of it's strength it would still have as much magnetic force as the ceramic sig.
Just how it is I think, these motors give some wild specs with aluminum coils as well.

Crazy.
Well, either way, keep doin' it. And I hope you didn't take my suggestions as me underestimating your abilities, wasn't aiming at that.