16.5 cube wall questions

[creed9]

As the topic says I got a 16.5 cube total wall and got 4 15" sa-15's to go in, any suggestions on what should be done with port size and tuning?, I have 2 ap3000d amps to power the subs. It will be for daily and if possibly a hair trick would be nice..

The vehicle is a 97 z71 ext cab truck with the box being 17" deep .

Lmk what ya'll think

Thanks

[RAM_Designs]

Doing a box that shallow really sucks because your port is going to need to make a turn, and behind that turn you're not going to have a lot of depth, not to mention two sub closer to the port than the other two. To counter that you can do a port in the middle, so when it splits(if it needs to) you will have a little more box depth behind the subs, and the subs(assuming two stacked on top of each other on each side) will all be equidistant from the interior port openings.

Edited March 17, 2011 by RAM_Designs

[creed9]

That is how I have done it. Port In centre and subs stacked. I've done 2 different ports (size wise) and I don't feel it is any where close to where it should be at.

The 3 12's socker audio subs (sundown parts) on one ap3000 was louder than the 4 15's on 2 amps. I don't know what to say or do at this point.. Looks for answers or options..

Thanks

[berniebp87]

Doing a wall setup usually require more volume (up to 50% larger than suggested box volume), the woofers need some air to get really loud. Example: The first box I made for my DD Z9518`s barely broke a 150 (okey, non walled and too little box volume) Then when I made the "real" one with a wall with about 30% larger than suggested volume it did 154.5, and it did 150+ from 23-60hz. The most common mistake people do is making too small enclosures for the woofers. Some times it`s not about surface area, but volume

[RAM_Designs]

What are the dimensions you're working with?

[creed9]

Int I'm 17 deep 58.5 wide at bottom an 41 at top but I'm 58.5 wide up 17" of the box then angle up. Total box height is 31.5.

[creed9]

Right now I'm at just over 13 cubes after displacements with 156sq/in of port. And it much better than the 11cubes with 210sq/in of port. The bigger box with smaller port is doin much better but I know there's much more to be had from this set up

[fox_racin4]

Are amps still set right? maybe they changed like they did last time. id try cutting port down a bit to raise tunning/gain box volume, then plug the port to bring tunning down, hen i get back from finals, well get togeather and mess around with it a bit!!

[creed9]

Anyone else?

[RAM_Designs]

Well you're already running the SA15's in the biggest box you can fit in your truck. You don't plan on adding more power(not like you need to anyways), so I don't see how you really plan on getting a big difference out of a new box. 13ft^3 is what I was going to suggest, and that port area seems about right...a little small, but not bad.