rhconcepts

Wow no help at all? this must be over everyone's head. Well I made the box 4.3 cu with a 6" port tuned to 32 and it peaked at 45hz. With 1500w it did a 146 @ 45hz So now Im adding a 8" port and the inside space is going down a bit more and im tuning once again at 32hz to see what it does. I will update this next week when I get on the meter.

1500 watts everyday and 1600-1700 for burps. They said 4 cubes should be 55 square inches for average. 10" sounds way to big but im no pro at making boxes. What would be different from the 8" to 6" because I cant find any 8" pvc around here unless I buy 10' of it.. I hear the bigger the port the more it will peak and smaller port will play flatter, is that right? Death Penalty Series 15 Sealed Not Recommended Ported 3.0 cubes - 5.0 cubes, 36 - 80 Inches of Port, 32-37 Hz Average: 4.0 cubes, 55 inches, 32-37 Hz

34 views and no one has any input for me ? Please guys any input would be good right now

I have a basic plan for this box and would like some feedback on the port size and box size. Here is what I have so far, inside 17" x 17" x 30" = 5 cubes - .22 for sub and - .78 for the 8" port im thinking the port will be around 22" << does that sound right? should the box be bigger or smaller and is a 8" port the right size ? and what if I did a 6" port with the same box, what would that do? Im looking to get the most spl I can at 32hz on this one. Thanks for your input guys

The truck likes 33 and 47hz I went with 33 because I like the lows. But this new box will be made with a 8" or 10" aero port so I can change the port. But liljestrand people tell me the same thing, make the box small with a lot of port.. But what would be a good starting point for size. The current box is about 3.7 after displacements with a large slot port. And im set on what way I want the sub and port, just want some input on the starting size of the box for the best power.

Hey guys, I just want to get some input on a burp box for 2 12" BL's fully loaded. This will be for a cross over and running 1000 or 2000 watts. Right now the system is up to 148.4 on 1800 watts with a some what music box. What I want to do is build the burp box so the subs are back and the port on the side. The info and input I need is the size of the box and the size of the port. Im 99% set on using a aeroport and was thinking 8" but would 8" be to small? Some people say the box needs to be big like 5 cubes and some say small like 3 cubes. So im a bit lost on where to start lol.

Yes 12" BL And I think after the ports Im sitting at 4.09 cu

Got ya,, Do you like I should try adding 2 more ports and cap 1 off? That would be 4 4" ports at 17-18 inches. Or should I start over?

I dont understand? that is what the calculator called for to tune at 34Hz. I can get two more 4" ports in the box and cap the center port. Do you think that will help?

Well its done and subs are in but I have a problem. The ports are uncut and the box should be tuned to 34 but peaks at 28hz. So I cut the ports to tune to 40 and now it peaks at 32hz. We think its from the back hatch acting like a port its self because its 4-5 inches from the box. So 32hz is good 40hz dips alot and peaks again at 50hz. The only thing I can do is make a new box with subs and port up but go with a slot this time. Maybe Ill do that just to have a music box.

I would have loved to do that but I would have never been done in time for the first show..

I don't care for the lip on the inside of them.

Sweet deal thanks, can you tell its my first bow with round ports lol. Here are my ports uncut, I think they come 17" long

Ok thanks. I see now I wont get my 32 and thats fine. My car peaks at 45 so Im going to try tuning to 36 or so. From the end of the port to the back wall how many inches are needed?

So if I'm sitting at 5.09 - the subs .35 = 4.74 do I need to take out more for the space that the ports will use? or do the calculators figure that out for ya? And how good is http://www.psp-inc.com/tools.html ? like it because it shows what I need for ports with a flare.