PDA

View Full Version : Check My Math



JimJ
04-04-2005, 01:43 PM
http://img240.exs.cx/img240/764/project34zg.jpg

does everything look good? I ran the numbers last night, but my brain was burned out from studying for chem so I probably made a mistake or two... :uhoh:

Hopefully this will work out.

JimJ
04-04-2005, 01:44 PM
and thanks to bcarpenter :)

monte_carlo97
04-04-2005, 02:55 PM
when i did port calculations i got 3.147 for length so you are good there.

monte_carlo97
04-04-2005, 02:58 PM
and you have .3 ft^3 for displacement?
Cause when i figured it out that is what you had extra. So if that is what driver displacement is i would say you are right on.




Is this for home audio use?
You are tuning pretty high.

JimJ
04-04-2005, 03:00 PM
So if that is what driver displacement is i would say you are right on.

I didn't calculate driver displacement...the drivers are pretty small: http://www.madisound.com/pdf/fostexdrivers/fe127erev.pdf

Maybe I should go back and do that...

The tuning is pretty high because they're full range, no tweets.

JimJ
04-04-2005, 03:07 PM
I got 62.82 cubic inches for driver displacement - comes out to around 3 hundredths of a cubic foot. I doubt that will make a difference.

monte_carlo97
04-04-2005, 03:07 PM
well with the dimensions above the total box are is around 1 ft^3

monte_carlo97
04-04-2005, 03:08 PM
my bad that is outside dimensions. I got to calculate displacement of the wood.

JimJ
04-04-2005, 03:18 PM
OK...I lengthened the box to 12 1/8" to factor for driver displacement:

http://img97.exs.cx/img97/6052/project37ez.jpg

JimJ
04-04-2005, 06:35 PM
is that correct? i'd like to get going on this box, so i can order the drivers...

Nikuk
04-04-2005, 07:08 PM
Yes, yes it is.

bcarpenterfhl
04-04-2005, 07:13 PM
what will you be finishing it with?

JimJ
04-04-2005, 07:15 PM
A light birch or maple veneer, most likely.

monte_carlo97
04-04-2005, 07:23 PM
looks good to me.
Veneer is going to look tight on that box.
I would consider a red oak veneer.
But i am a red oak guys so that is just me.

bcarpenterfhl
04-04-2005, 07:42 PM
i thought you were dead or something man...welcome back. there goes my box desigining business.

monte_carlo97
04-04-2005, 11:26 PM
it seems like Jmac has given up on box building.

sumone
04-05-2005, 12:58 PM
^ See how he laughs at other peoples' mistakes...lol. Sounds like a biggie/puff daddy scenario...puff wouldn't have blew up like he did if biggie didn't die...lol.

Nikuk
04-05-2005, 01:00 PM
^ See how he laughs at other peoples' mistakes...lol. Sounds like a biggie/puff daddy scenario...puff wouldn't have blew up like he did if biggie didn't die...lol.

WTF does that have to do with anything?? LMAO