is this box calc accurate?

[beerman 10+ year member]

If you measure down the center of the port, you'd find that the port length is, in fact, 17.5" ...

0.75" (wall thickness) + 13.5" (teal) + 0.875" (1/2 port width) + 0.875" (1/2 port width) + 0.75" (wall thickness) + 0.75" (violet) = 17.5"

There shouldn't be a violet board at all for 16.75" ...

ACCK!

Include "end correction factor" (subtract port width from overall length since one wall is actually a box wall) and it's all kinds of wrong.

Fark. I have a bit of work to do tonight.

 

[BastardKidKris 10+ year member]

beerman for prez

 

[King_Of_Da_Souf 10+ year member]

ACCK!
Include "end correction factor" (subtract port width from overall length since one wall is actually a box wall) and it's all kinds of wrong.

Fark. I have a bit of work to do tonight.

don't u subtract half the port width??? Wish i knew more about this shit.

 

[beerman 10+ year member]

don't u subtract half the port width??? Wish i knew more about this shit.

Yes, it should be fixed now.

 

[djman37 5,000+ posts]

i like the cutlist at the bottom. Nice work, beerman.

 

[60ndown 10+ year member]

yea beerman , nice of you to take the time to put the calc up, even if its a little off sometimes-.. its gonna help a ton of people build good boxes rather than real shitty ones. if you keep makeing it better its gonna put alot of box builders out a buisiness? good for us- bad form them. dont be supprised if someone hacks the calc?

 

[60ndown 10+ year member]

Anyone could just look at the source code and either copy or reverse engineer the calculator (not very difficult). Of course, you should at least ask for permission to copy or make modifications to anyone else's work. That's just common decency ...
And, no, I don't think it'll put a lot of enclosure designers out of work ... Not that a lot of enclosure designers should get work either because they don't know WTF they're doing ... Part of having someone else design an enclosure for you is having their experience, knowledge, and expertise in deciding what enclosure is best for you and your application ... This calculator can't do that ...

Good job on the calc, Beerman, I can't seem to find any mistakes yet ... I'll let you know if I find any, though ...

i tried an online box calc guy recently, calced-box and cut sheet were different? tuneing was effected by difference in desighn/cutsheet-box sounded like shit! and he is supposed to be good-he did send me my $10 back tho!

im not gonna say who it was, that just wouldnt be nice

 

[DrtySthV6SE 10+ year member]

dude that awesome, got the same cals i got for my new box //content.invisioncic.com/y282845/emoticons/thumbsupwink.gif.129404938effda6ad9cca39e7f4b58a3.gif

 

[Mr. Opportunist 10+ year member]

what if we have a set depth that we need?

 

[Decipha 10+ year member]

what if we have a set depth that we need?

then you plug in different dimensions to get what your looking for

 

[bimma85 5,000+ posts]

I can't please everyone. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
It was designed to make the smallest possible box for a typical daily driver system, given MFR recommendations.

The calculator does hiccup, and I am working on v2.0 to fix the hiccups, among other things.

It will take about 30 seconds to add a checkbox for high SPL, increasing the port area by 33% by changing the minumum port area from 10 square inches per cubic foot to 15 square inches per cubic foot. Would this work, or should I make it even larger?

Ideally, I would take into account woofer parameters and port dimensions to calculate peak port velocity and give the user recommendations if the port is too small or tuning is too low.

Ideally, I would also have all the time in the world. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

It better be right be, I used it awhile ago to design my box //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif. I was quite happy with the box btw. I actually used v2, found out about the calculator on a different forum you were posting on. Very thoughtful of ya too take your time and do this. Just wanted to say thanks. //content.invisioncic.com/y282845/emoticons/patriotic.gif.b47a6e0394a3738334c387bdf79409f4.gif//content.invisioncic.com/y282845/emoticons/toast.gif.bc0657bf54b9ee653b6438524461341e.gif

 

[Decipha 10+ year member]

x2 i think its really great what your doing beerman, i'll deff have a new calculator (even tho i always double check with my own calculations)

 

[beerman 10+ year member]

I'm putting together V3 specs right now. Sounddomain and deCAF have feedback threads going.

 

[Thecontender 10+ year member]

are you implementing the 9:1 ratio suggested for ported enclosures?

 

[bimma85 5,000+ posts]

So what do you have in store for v3 that is new?