RAM_Designs

That box is over 10ft^3 before sub and port displacements...

Upload to photobucket, paste code here.

Sorry, I don't have anything with a width that small.

This design is for Dustin Fowler for a pair of AudioQue HDC 15's going in his '99 Tahoe. The box is 8.5ft^3 with a 35hz tuning using a massive kerfed port. Overall dimensions are 48" wide x 16.5" tall x 32" deep.

You could find one on eBay pretty easily, I would assume.

I might have something already done that will work for you. What dimensions are you working with?

I've never done it, but I don't beat the piss out of my stuff either.

Great price for a pair of HX2's.

Thanks guys.

That's why I don't like aeros. To get a good amount of port area you need to use 90* elbows and custom make them to be 20"+ long. A single 6" aero would be the absolute smallest I would go.

Here is another design that I am doing for Mitchell Collins over in Aussie land. This was obviously done in metric units since they use 18mm MDF over there, which takes me a little longer than usual...it's a good learning experience though. The box is .8ft^3 sealed with a 1.15ft^3 ported chamber tuned to 44hz, and is for a lower line Phoenix Gold sub. As you can see there is a spot for a removable plexi window to be installed, which will allow for monitoring of the sub's excursion and removal of the sub from the ported chamber. Youtube's audioswap feature is being a pain. I uploaded this two days ago and still no audio.

37.5" x 17.25" x 16.5" = 4.92ft^3 before sub and port displacement 15"x4.5"x22" = .86ft^3 for port displacement Left's say .15ft^3 for sub displacement So without any bracing you're looking at 3.9ft^3 after displacements. A 3.9ft^3 box with a 15"x3.75" port that's 22" long gives you a 37hz tuning. A 32hz tuning using the same net volume would require 31.75" of port length. It looks like he was finding the port length based on the gross volume of 4.92ft^3, which is not the right way to do it.

Dang that is a lot of space. In my dodge 4-door I have 61" wide x 21" tall x 23" deep to stay under the window line.

What subs are you using? With a box this size you'll likely want to be doubling up the mdf in some places, if not everywhere.

Nice, XBL^2 motor FTW.

Nice sub. If this is the newer model, it'll be an absolute beast in the 20-50hz range in the right box.

1.75-2ft^3 with a low 30's tuning will work well.

I have a 10" Assassin in 1.5ft^3 at 28hz and it has no issues playing up as high as you need it to, and it also has great low-end output, as you can imagine. Every sub behaves differently in a certain situation. Just because someone's setup can't play well above 50hz in a low tuned box doesn't mean that every low tuned box has that same issue.

Doesn't really matter what you pick, four 15's with that much power is going to be loud as balls.

hmm...

Doing two 12's will allow for plenty of room to fit everything properly. Follow the "Get a custom design quote" link in my sig to get directed to my website where you can input all info and get a quote before submitting the info to me.

With the 36" width you're working with, you're going to be hard pressed to get a big enough port in there with a pair of 15's. I can get 70in^2 of port using just a normal slot port.

I still think the port is too small...I'm just not a fan of small ports. Unless you can get 8ft^3 or more before sub and port displacements, I think you'll be sacrificing output in the end unless you're running a good deal more than rated power.

This was a good idea...what happened?

Are you using the same external dimensions that he provided? If you're using a bigger port than he is, then you're ending up with even less chamber volume after displacements, which is why that 35hz tuning is peaking higher than it should.