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View Full Version : Design Help For 3 SA 8 v2's



Slobalt
01-22-2014, 03:15 PM
Vehicle :Cobalt 2 dr
Location in the vehicle:Trunk
Space available (Length x Width x Height):24" x 31" x 15"
Subwoofer make and model:SA 8 V2
Subwoofer Size:8"
Number of Subwoofers:3
Type of Port (Kerfed, Slot, Aero, etc.):Slot
What type of music do you like?:Rap/rock
Is your goal SPL or Everyday Music?:Music
Tuning Freq (Hz):Aiming for 32hz
Volume :2.25 ft3
Questions:I've been playing with winisd and I can't get the port to be a reasonable size (smaller). I tried doing 16 x 2.25 = port area needed and that results in too much port noise. I then tried to increase the port area, which takes away from the port noise but makes the port length way too long. So what am I doing wrong or how can I fix my problem.

SPLluminator
01-22-2014, 03:24 PM
Its because you're at 32 hz. 35 would be much better suited and is also recommended by the manufacturer IIRC. Will also shorten that port length up. Don't skimp on port space either. At least I prefer not to. 12-16sq.in. per cubic foot of airspace is a typical range.

Oh, and long skinny ports don't seem to work as well. Try maybe using an aeroport if you're tight on space.

Slobalt
01-22-2014, 03:32 PM
Its because you're at 32 hz. 35 would be much better suited and is also recommended by the manufacturer IIRC. Will also shorten that port length up. Don't skimp on port space either. At least I prefer not to.

Oh, and long skinny ports don't seem to work as well. Try maybe using an aeroport if you're tight on space.

Winisd gives you the port length? Also I've tried tuning it to 35hz and that helped a very little bit not enough to make a difference. I've tried giving it as much as 54 square inches of port area. Still no luck.

SPLluminator
01-22-2014, 03:43 PM
Look over all your settings I bet you typed something in wrong or there's a decimal somewhere it shouldn't be.

Slobalt
01-22-2014, 06:41 PM
Look over all your settings I bet you typed something in wrong or there's a decimal somewhere it shouldn't be.

Triple checked nothing. And I started a new project still the same out come.

Buck
01-22-2014, 07:00 PM
I can design a box for you.

Slobalt
01-23-2014, 11:19 AM
I can design a box for you.

Thank you for the offer but I would really like to learn what I am doing wrong. If I can not seem to get it right I will pm you.

Slobalt
03-08-2014, 02:41 PM
Ok so I'm going to tune it to 35hz but I have question is it a bad idea to do a vent 25.5'' x 3.2'' (thats what I come up with on winisd)

Slobalt
03-10-2014, 09:56 AM
No one knows? I just want to know if it will sound good with a vent that long and only so wide?

FUKAZ28
03-10-2014, 10:59 PM
Why not just get Buck to design you one and learn from it?

bandit_kb
03-10-2014, 11:23 PM
check out this site. Customize your Triple 8" Straight Ported Custom Subwoofer Box | Klaus Audio (http://www.klausaudio.com/subwoofer-boxes/customize.php?productid=179&categoryid=101&x=54&y=11)
You can put in your own specs and it will give you the design for free. Might give you a better idea.