I have 2 SSA Evil D2 15s  with Fresh Recones. The Recones have 4 Stiff Spiders instead of the normal 3 the Evils come with. I am currently running them on 1 Crescendo BC5500 with plans for 2 - BC5500s

 

My box is 10.13312 Cubic Feet inside after all displacement.

The port inside dimensions are 4.5" wide X 9.25" high X 9.375: deep

 

I came up with that the box is tuned to 27.5hz

 

Is this box good or should there be changes. Please give me any help and or input. It is in a hatchback B Pillar Wall

 

I appreciate all input

 

Thanks in advance

Port velocity?

Fi 4 Life im not sure what your asking?

Did you model this set up in a program to see how it will plot out?

No i dont have software. I just built it for my son. Its birch and double baffled all the way around.

 

Can you help

Changes? But you said it was already built and why tune so low?

Downloading modeling software will be your best help.

We made the port so we can interchange it. The box was origonally built for PSI subs.

 

What would you sugest

I have another port that is tuned to 30hz would it be better

Edited October 24, 20159 yr by jeep187

Yes...but checking port velocity would be the first step. Winisd is free and easy

The port seems tiny for 2 15" evils.  40 sq in of port is hardly enough for one.  According to the calculator I use- 2 evils properly fed need roughly 150" of port area.(for a daily build...even more for all out spl)

 

But with you running Nendo amps, SSA subs, and a walled hatchback...I wonder if you are messing with us?  I mean thats high grade gear for beginners.

 

I use - http://www.carstereo.com/help/Articles.cfm?id=31  - to find out port area and length.  Then WinISD(free) to check response and port velocity.   

Yikes, I read that wrong.  I thought it was a single driver.  Time for a new box.

If you added a spider, raise the Fs and drop the Vas a little if you model...  Like 5%-10%...

 

40in3 isn't a small amount of cross-sectional vent area, for any 15" driver with almost any power input...  It is actually a lot...

it's not any...it's 2 15" evils on 10K.  

 

I was recommended 52"/per for my dss subs in an sq-ish build with 1/3 the power.  Maybe I am missing something.

Heres a pic of 1st run on the meter with 1 BC5500

Not bad at all man, great scores. You should post up a build log

Thank you Justin will do.

Big numbers.