need help on box...

[photocrazy8 10+ year member]

ok wow i calculated 12.87 if you have (4) 4 in wide PVC ports. if you want a diff style its a different length. there is lots of math and physics in making a box. much harder than people think...

it was in an above post

 

[K&c Customs 10+ year member]

thanks

 

[PV Audio 5,000+ posts]

it was in an above post

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif :laugh: //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif I can taste your frustration from over here lol

 

[photocrazy8 10+ year member]

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif :laugh: //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif I can taste your frustration from over here lol

thanks PV your my idol when it comes to designing. was this one correct? //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[PV Audio 5,000+ posts]

Okay, here's my idea. Instead of using 4 4" ports, you can get more port area (8 in^2 more ) using two 6". If you use two of those that are 12" long, you can get a 34.7hz tuning with ~6.8 cubes. This is assuming that the PVC is .25" thick, and I don't know how thick it usually comes lol.

 

[photocrazy8 10+ year member]

Okay, here's my idea. Instead of using 4 4" ports, you can get more port area (8 in^2 more ) using two 6". If you use two of those that are 12" long, you can get a 34.7hz tuning with ~6.8 cubes. This is assuming that the PVC is .25" thick, and I don't know how thick it usually comes lol.

good call... would you get better air flow with (4) 4in or (2) 6in?

 

[PV Audio 5,000+ posts]

I actually wouldn't know. The thing is, you have a larger obstruction with a 6" port, but you have more obstructions with 4" ports.