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View Full Version : Drew up this design. need help!



supermaxx123
11-26-2009, 03:47 AM
I have most the wood cutout and I want to build this tomorrow. I'm wondering what its tuned too, all measurements are correct. If i calculated it right i Have a 52inch long port...
Am I correct? I'm thinking its tuned around 34hz???
My first box, want to do it right, at least know specs.
Thanks

supermaxx123
11-26-2009, 03:47 AM
http://i115.photobucket.com/albums/n291/beetle123/Mybox.jpg

mobeious
11-26-2009, 09:47 AM
i think using a labrith port of that length is going to hurt ur overall port velosity 4 180 degree turns is going to have the air flow all jumbled up .... why not try wraping the port around the back side of the box?

supermaxx123
11-26-2009, 02:34 PM
Sub wont fit that way, It actually might but i would only be able to do one. I'll see what I can come up with

NoCoSPL
11-26-2009, 02:39 PM
i think using a labrith port of that length is going to hurt ur overall port velosity 4 180 degree turns is going to have the air flow all jumbled up .... why not try wraping the port around the back side of the box?

This.

Port looks cool and all but its not going to perform, too small with to many bends.

supermaxx123
11-26-2009, 02:46 PM
I'm going to try and remove 3 of the bends. I'm also going to add 45's to the corners. This sub requires a small box so i need a lot of port to tune it low. Also going to round all square edges over, anything to help.
Thanks for the port change suggestions.

NoCoSPL
11-26-2009, 02:47 PM
What car is this going in?

supermaxx123
11-26-2009, 02:54 PM
For now no car, just want to build this and maybe sell it since i have no use for it. I think I'll be able to get rid of 2 bends and have the port in the back. I've got .25" for the sub and back wall if i do it that way so it will fit.

bubbagumper6
11-26-2009, 11:35 PM
Did you draw that in paint?



*facepalm*

supermaxx123
11-27-2009, 03:08 PM
Did you draw that in paint?



*facepalm*

yup,.
built the box and i'm not happy with the sound, to much high bass :(
Going sealed next, then ported tuned lower

TMali
11-27-2009, 03:16 PM
did you figure in sub displacement? and you should have went a bigger port, not longer

supermaxx123
11-27-2009, 03:25 PM
yes i did, I did this wrong to begin with because i cut the wood out first then kinda figured, OOPS its too small. I'm sure if the sub was smaller It would decrease the tuning about 2hz so I'm going to look for a smaller sub. The sub sounds accurate though, just dont like the actual sound coming out. I'm used to lower tuning. Oh and my LP on the amp is set to 55hz.

NoCoSPL
11-27-2009, 03:25 PM
did you figure in sub displacement? and you should have went a bigger port, not longer

:veryhapp:

supermaxx123
11-27-2009, 03:29 PM
:veryhapp:

I couldn't fit a 61inch long port, thats if i went bigger to 3x11.5 which is what I will do next time.