4 SA-10 Box Design & yet another tuning question :o

[Jd377 6]

So I couldn't sleep last night and decided to start designing the box I want to build for my 4 SA-10s that im getting in next week. Thought I'd post up the pics....

Also, After discussing yesterday with a few of you and trying to decide how to do port area and everything with some aero ports, I decided on the (4) 4" aero ports.. But then after I designed it and everything I realized that the tuning you guys said was about 39hz.... and Sundown recommends 30-35hz for these subs.. 39hz was like the only tuning we could get to work in order to get enough port area for my setup.. So I wanted to make sure before I buy everything and build this,.. Are the subs going to do/sound ok at 39hz since they are recommended to go 30-35hz. I really wanted lower but could really only get this to work with my setup and space available.

Here's some pics: *4 Sundown 10's...4-4" aero ports.... viewing window in front to see sexy woofas pounding inside.... LED install inside, hopefully Sundown logo on viewing glass.. ( Not actual glass )

Edited September 16, 2011 by Jd377

[ssh 924]

It looks like you have space to make the ports longer, thus reducing the tuning frequency.

[Jd377 6]

17" is their full length. i wish I could do like 3 ports or something and make it lower :'( but its ok.. I mean is it going to be a waste to get them if I end up doing 39hz? I want to get a lot out of these and them to sound amazing!

[ssh 924]

17" is their full length. i wish I could do like 3 ports or something and make it lower :'( but its ok.. I mean is it going to be a waste to get them if I end up doing 39hz? I want to get a lot out of these and them to sound amazing!

You can't cut them in the center, add a pvc/abs coupler, add some pvc/abs pipe, and lengthen them?

If I ever do add bass to my car, I'll probably tune around 39hz.

[Jd377 6]

How do I figure out what that will make it with like 2 more inch per port, the site doesn't let u type port length and then calc tuning, it only let's you type tuning and then it tells u how much u need lol. Or I guess I can type random numbers until it says 19" length 4 4" ports

[Jd377 6]

An I just didn't know if 39 would be bad since they say to do between 30-35

[Quentin Jarrell 671]

Is the total length 17 or just the pipe? Don't forget half of each flares' radius adds to the effective port length.

[Jd377 6]

Oh true good point! I'm glad someone knows what they are doing

[RAM_Designs 25]

17" is the total length of an assembled Precision Port.

[Jd377 6]

4.66 volume after displacement. (4) 4" ports

[backyardbass97 0]

what site are u using

[Jd377 6]

This is what I have been using currently: http://www.psp-inc.com/tools.html