18 inch DSS Ethos

[Quentin Jarrell 671]

This will be the place for eveything 18 inch Ethos.

 

 

Re     3

Le     2.94 mH

Qms     6.19

Qes     .845

Qts     .74

Fs      23.75 hz

Mms     448.6 grams

Cms     .1 mm/N

BL      21.43

Vas     181.85

SPL     88.26 1m/1w

power     1800 watts

Sd     1,134 cm^2

 

 

 

 

 

 

 

 

 

 

 

Edited July 12, 2014 by Quentin Jarrell

[Dictator 39]

ohhh whats the box specs on this bad boy?

[Stephen93s10 40]

Nice!

Edited May 7, 2014 by Stephen93s10

[ohio45113 24]

go all crazy Q and make a 21

[Quentin Jarrell 671]

Not enough motor for the moving mass.

If I ever do anything over an 18 it'll be oblong. Can't go much over 18 and be under the window line.

[stevemead08 752]

Good stuff buddy.

[swift 501]

Awesome,

[Lee Carter 150]

Trade you my 15s(unopened) and some boot for some 18's right now.LOL

[Sencheezy 689]

looks good!

[Quentin Jarrell 671]

ohhh whats the box specs on this bad boy?

Gonna be around 4-4.5 feet. I still have to extrapolate parameters.

[mccleery3 166]

Schwing!!! I'm so ready for these!

[garychurch84 127]

ohhh whats the box specs on this bad boy?

Gonna be around 4-4.5 feet. I still have to extrapolate parameters.

4 would be nice! Maybe be able to sqeeze one in the trunk depending on port area.If so I will be selling my icons and box.

[ramteid 17]

ohhh whats the box specs on this bad boy?

Gonna be around 4-4.5 feet. I still have to extrapolate parameters.

If i can get a job i may sell my zcon and get one of these, if they only need 4-4.5 cubes

[SacredTanakh 67]

 

ohhh whats the box specs on this bad boy?

Gonna be around 4-4.5 feet. I still have to extrapolate parameters.

 

Why is it that your subs are on the very small side as far as enclosure recommendations? almost half what most companies recommend for similar woofers. Just curiosity. 

[Shogen 325]

ohhh whats the box specs on this bad boy?

Gonna be around 4-4.5 feet. I still have to extrapolate parameters.

Why is it that your subs are on the very small side as far as enclosure recommendations? almost half what most companies recommend for similar woofers. Just curiosity.

Great research and ingenuity

[Quentin Jarrell 671]

 

 

 

ohhh whats the box specs on this bad boy?

Gonna be around 4-4.5 feet. I still have to extrapolate parameters.

Why is it that your subs are on the very small side as far as enclosure recommendations? almost half what most companies recommend for similar woofers. Just curiosity.

Great research and ingenuity

 

Proper engineering and execution.  The drivers had to goals.  1st work in small boxes with my desired response, which is number 2.  Destroy the lows.  Anyone worth their salt can create a driver especially a subwoofer with what they think will be a flat response.  This is what we are after but it's not that simple.  

 

Back to the small enclosure, very simple physics.  You need x amount of force to get x amount of mass moving in x amount of volume.  This is simply calculated with FEA programs.

 

Now back on the response part.  Everyone gives out specs with boxes that show an awesome flat response on paper.  But we don't listen to anything in anechoic chambers.  We listen to our sound in vehicles right?  And vehicles have cabin gain which gives boost normally in the mid 40's region.  To help better explain where I'm going with this  here is an analogy.  If you install a set of highs and you crank it up and the mids sound noticeably louder than the tweeter you can do two things to fix it.  One you can adjust the crossover to remove boost form the tweeter or you can boost the mid to the level of the tweeter to make everything match up.  Because we can't adjust the boost down in the bass frequencies caused by transfer function which is normally 5-10 db around 45 hertz we do what we can, which is boost the frequencies from 25-35 hertz.  This gets you pretty close to a netted flat response in a vehicle even though on paper my recommended boxes shows a large peak in response around tuning and flat everywhere else.  This is the key to why you hear people say it slams both low and high frequencies better than most other drivers they have heard and not just hits the lows of just upper frequencies.

 

 

Another thing to note is I use large signal parameters to design drivers.  To those that have heard my drivers would it shock you to know that the small signal FS of the Ethos 15 is nearly 48 hertz?

 

The most important aspect to my sub design is Pat Turnmire and Enrique Stiles.  They are hands down, no questions asked, two of if not the best set of engineers in the world.      

[Sencheezy 689]

Damn, fs of 48 haha. Yes, from songs that go from 45hz down to 32hz, you feel there us no "transfer", sort of speak. It feels as one baseline at a different frequency. It's a smooth transition.

[swift 501]

What do we have here

 

 

 

[jcarter1885 995]

looks badass 

[daviddto 90]

Killer!

[Quentin Jarrell 671]

First set of Ethos 18's right there

[swift 501]

They are gonna get loud and low that's for sure:)

[stevemead08 752]

Wish I had a need for 18s.maybe it's time to wall the camaro again.

[swift 501]

Hell yeah, I have a goal that should be attainable under 40hz.

[jonbearsmt 919]

so sexy.. loving that big 12 spoke