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View Full Version : my new box log, with pics



vosschs
12-14-2004, 08:41 PM
im building my new ported box, just started at school yesterday no plans or ne thing just free built it, so heres what i have so far

this is the wood i have its all glued up scrap vanneer core plywood which flexes none, also with mdf, its all free wood so i didnt care, dont care what it looks like either it will get carpeted,

http://img92.exs.cx/img92/1610/00000225nq.th.jpg (http://img92.exs.cx/my.php?loc=img92&image=00000225nq.jpg)
this is a pic up close how i glued them together each splice has about 4 or 5, 20 style or i think 2.5 inch biscutes glued with enough wood glue
http://img92.exs.cx/img92/6980/00000233oj.th.jpg (http://img92.exs.cx/my.php?loc=img92&image=00000233oj.jpg)this is with the first side on,
http://img92.exs.cx/img92/4086/00000243cn.th.jpg (http://img92.exs.cx/my.php?loc=img92&image=00000243cn.jpg)
basic pic of it all together without the top and port

http://img92.exs.cx/img92/5103/00000250ot.th.jpg (http://img92.exs.cx/my.php?loc=img92&image=00000250ot.jpg)]
front pic of the port, 2.5 inches wide
http://img92.exs.cx/img92/6111/00000269kz.th.jpg (http://img92.exs.cx/my.php?loc=img92&image=00000269kz.jpg)last pic for now its from above i had to quit for tonight stuck on the port, i need help with it i need a port tuned at liek 33-43 hz dimensions are 25.5 wide 15 high and 21.5 deep, thats where im stuck at , and i dunno how to do that its hard
http://img92.exs.cx/img92/3459/00000280qk.th.jpg (http://img92.exs.cx/my.php?loc=img92&image=00000280qk.jpg)

Acidburn
12-14-2004, 10:11 PM
umm... that wood really does not look like the stuff you want to be using

brandontw
12-14-2004, 10:18 PM
yea that would is no-bueno amigo, especially the slopping peices together cause thay are too small...but whatever floats your boat

vosschs
12-14-2004, 10:38 PM
it doesnt matter, the glue is actually stronger than the wood so its like one peice, also its with biscutes that makes it even more stronger, if you were to break it it wouldnt break on the seam where they were put together, and none of it flexes so it doesnt matter

amedeuce
12-14-2004, 10:57 PM
it doesnt matter, the glue is actually stronger than the wood so its like one peice, also its with biscutes that makes it even more stronger, if you were to break it it wouldnt break on the seam where they were put together, and none of it flexes so it doesnt matter


They Ment the "kind" of wood, plywood will probably not sound as good as MDF..

vosschs
12-14-2004, 11:14 PM
They Ment the "kind" of wood, plywood will probably not sound as good as MDF..


does anyone have actuall proof im just wondering, i have a ported box made the same way sound EXCELLENT!!, no signs of wear after 3 months of use, no cracks, no leaks,

ss3079
12-14-2004, 11:18 PM
the glue is actually stronger than the wood

Finally, someone else who actually realizes that the glue joint is actually stronger than the wood itself (in certain situations).

- Steve

davidfre21
12-14-2004, 11:18 PM
what are u gonna put in it?

Acidburn
12-14-2004, 11:22 PM
Finally, someone else who actually realizes that the glue joint is actually stronger than the wood itself (in certain situations).

- Steve
i think most people know this, its pretty obvious when you're trying to take a box apart

ss3079
12-14-2004, 11:25 PM
Wonder if all of those people who insist on using three foot long screws every two inches, even when clamps are mentioned, know this? ;)

- Steve

Acidburn
12-14-2004, 11:26 PM
i dont know but all the screws make it pretttttyyy

vosschs
12-14-2004, 11:36 PM
Finally, someone else who actually realizes that the glue joint is actually stronger than the wood itself (in certain situations).

- Steve



MUCH STRONGER!!!, **** i knew this 2 years ago when i was 15 , lol



Wonder if all of those people who insist on using three foot long screws every two inches, even when clamps are mentioned, know this?

- Steve


also i have glue in the joints plus screws ever 2 inches, i like to be sure,



what are u gonna put in it?


type R for a few days, then AW1206t for a few days cuz its a christmas present, then around the 5th of jan or so i will get a new sub, no idea what kind yet,

vosschs
12-15-2004, 12:21 AM
thats where im debating with what sub to go with
http://www.caraudio.com/vb/showthread.php?t=78883

brandontw
12-15-2004, 12:48 AM
but plywood has different properties than mdf, so it will flex and sound differently, and yes the glue is often stronger than the wood, but is still causes a discontinuity in the surface... when building speakers discontinuity=bad

ss3079
12-15-2004, 01:05 AM
but plywood has different properties than mdf, so it will flex and sound differently

Different properties yes.

I'm using MDF for the Shiva's right now. I'll switch to a birch plywood box and we'll see if the judges drill me because it sounds different.

Tried it, didn't make any difference in my application.

Every application is different, so you must've (hopefully you've tried it :suave: ) had a different one.

- Steve

brandontw
12-15-2004, 01:14 AM
I have not tried it, just saying that it different, not that its not almost as good;)

IgnoreMe
12-15-2004, 03:31 AM
as far as i know, from what ive READ (thats right no personal experience) as long as it doesnt flex, it will sound just as good. btw, i keep hearing the wood glue makes it stronger than the wood itself. my question is, what kinda of wood glue are we talking about here? what brand, or does it even matter? i always used liquid nails until moe lester mentioned once that wood glue is still stronger than LN.

DBfan187
12-15-2004, 09:38 AM
gorilla glue>j00

req
12-15-2004, 10:31 AM
ok people. jmac has spoken, dont ask why. just believe him. otherwise he will spend another 4 hours working on an indepth explination about molacules loosing their bonds because of a difference between the chemical bond between the wood and the screw... then he will whip out some bogus math table depicting the difference in rigidity between the distance between the screw and the 'optimal' distance is exactally 4.698 inches apart with a #4 countersunk drillbit that is exactally 1.348" long while using 1 3\4" deep-thread drywallscrews with a zinc coating to absorb the glue into the metal better. and his chart will be used with five or ten different boxes of different sizes and different subwoofers... and he will prove that he is right.

so just say 'yes mr jmac, whatever you say' then go back into the garage and put as many screws in that box you can fit :thumbsup:

:)

req
12-15-2004, 11:01 AM
hahaha >_<

your so funny jmac!

g30ffr3y
12-15-2004, 11:07 AM
all this guy wanted to know was the length of
the port for his given tuning...

he got the wood for free and just made a box...

when did he ask for a discertation on how using
too many screws is bad...

and still no one has answered the question...

vosschs
12-15-2004, 11:10 AM
http://www.caraudio.com/vb/showthread.php?t=78933&page=2

thats what im doing,

woahloud
12-15-2004, 12:00 PM
Ah c'mon Jmac, you couldn't quite possibly know what you're talking about ;)

Strecker25
12-15-2004, 01:44 PM
^^ Wrong ... :p:

At 11.75" length, the net volume is 3.343 ft^3 tuned to 41.2 Hz ...

Assuming, of course, that he meant 11.813" total length, accounting for the 0.75" thick wall it passes through (which would be 11.063" internally) ...\

:( just tried to help him, im assuming it was a little closer to what he wanted than his initial design, which appeared to be an outrageously long port.