can someone design me a box for free?

[j3bus2k3 5,000+ posts]

The way I've always done is it to take your net volume, and determine what you want to tune to. Find your port length and then with that, find your port displacment. Add your Net volume and port and driver displacement together which will give you your gross. Then from that, derive your dimensions...

 

[Big Dee 10+ year member]

not really...you may feel the air coming out of the port onto your feet though. I'm going to crunch the numbers for ya for port length...something about dude's measurements don't sit right, probably cause I simply don't trust winISD.

I got the same result with 3 different calculators, please show me where my calculations were off.

 

[j3bus2k3 5,000+ posts]

I just dont like those programs, I'd rather use pen and paper and the website of the ports maker...

 

[j3bus2k3 5,000+ posts]

And again...for a 2.1ft^3 box at 30hz...each port needs to be 29" long; the tube itself needs to be 24". Which you cant do because the supplied tube is 17"

 

[bvr_j_0969 10+ year member]

And again...for a 2.1ft^3 box at 30hz...each port needs to be 29" long; the tube itself needs to be 24". Which you cant do because the supplied tube is 17"

my box is going to be 3.4 cft before displacements, after driver displacements that would be 2.98 cft and thats what i have been trying to calculate my port length by

 

[j3bus2k3 5,000+ posts]

2.98ft^3 net tuned at 30hz would need a port length of 20.11". If your using the flared ports from PSP Inc, you would need to cut the supplied tube to 15.11".

 

[bvr_j_0969 10+ year member]

but the 20.11" poses a problem because to use the ports i would have to place the ports on the sides of the box pointing into the cab corners, which the box is going to more then likely seal off completely because it is going to be a very tight fit.

im not sure but i dont think it would be good to port a box into something that more then likely will be sealed up mostly

 

[j3bus2k3 5,000+ posts]

No you dont smoosh (I know its not a word) the openings of the ports right against another surface. If you dont have a vents diameter of clearance, its not suggested...

 

[j3bus2k3 5,000+ posts]

Just did a quick calculation and everything involved, Net volume, driver/port displacment, your standing at 3.229ft^3...