Boxes in a pentagon shape?

[AltarCrystal 10+ year member]

Alright, long story short, I drew up a plan for a pentagon-shaped sub box. It'll be for a single 12" Fi Q (Which like 1.8-2.5 cubes @ 28-33hz). I made some measurements and cut out one side to make sure it can fit. The reason for this? I need it to be flush with my back seats (Which slope) AND slops up at the bottom so I can get to my spare (I'll be driving an hour and a half everyday for the next few years).

I still want ported, so I'm going with round ports, hoping I can make flares for PVC or if worse comes to worse, buy Aeroports.

Is it possible to make a box this shape and have it sound good? I'm in the middle of figuring out the volume of the box, width can go up to 37" so I got some numbers to play with.

Luckily my math hasn't left me yet, only good thign of beign a major in computer science //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

Click to read more...

 

[dipitydoo 10+ year member]

it will be fine.

 

[swimfreak26 10+ year member]

As far as most applications are concerned, shape doesn't make a difference.

That's not completely true, as some shapes - if the correct size - can cause standing waves...but for the standard application and the size you're speaking of...it'll be fine

 

[BassAce 10+ year member]

Is it going to be like the pentagon building and have an open area in the center?

 

[AltarCrystal 10+ year member]

Is it going to be like the pentagon building and have an open area in the center?

Well yeah...for the sub //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

So I won't get any standing waves in this? Just as long as somewhere around 2 cubes I should be fine?

Also, how do I go about calculating tuning using round ports/pvc pipe? As in, what diamater, length, etc pipe should I use?

 

[AltarCrystal 10+ year member]

Ok, I got a box that's 2 cubes, still gotta make sure the woofer fits, but I won't build it until I"m sure it fits. Don't know if the basket will clear //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Anyways, yeah, I just need to find out how to calculate the tuning of a round port with PVC pipe.