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View Full Version : built my first box!!! really bad pics...



g30ffr3y
12-07-2004, 11:10 AM
well guys... since my SE's have been on vacation i havent
been neglecting my car audio... ive actually been quite
busy building my first box... not only my first box... but
my first ported box...

its 1.8^3 after displacement and port area and its tuned
to 32hz as to RE's specs for a single SE 12"

i made it out of the usual 3/4 mdf which is very easy to
work with... the only tools i needed were a circular saw,
jig saw and a drill... odds and ends included some silcone
and gorilla glue and lots and lots of screws...

id like to thank those who helped me... but i dont know
if those people would like to be thanked publicly... but
i do thank you...

this just goes to show that building your own box can be
done quite easily and at a much lower cost and higher
quality than buying a pre fab box... i think i spent less than
50$ in supplies...

i know its not carpetted yet... but i will be doing that when
i get some time... right now its in my girlfriends car loaded
with a JBL 125 watt 12" sub... she used to have 2 12"s of
these JBL's sealed... but this single one ported is EVEN LOUDER
than the 2 sealed... its awesome!!!

i am rather proud of my first stab at box building and just
wanted to share and show anyone who may be leary of
taking this project on that it can be done by even the
newest of noobs... AND ITS WORTH IT!!!!

ok... im done... thanks for listening...

req
12-07-2004, 11:16 AM
mind posting the dimensions for this box? looks good.

whats up with the foam pad behind the speaker? was it not sealed all the way or sommin?

looks good mang. glad its super loud :)

swimfreak26
12-07-2004, 11:22 AM
Looks nice, very clean.

g30ffr3y
12-07-2004, 11:24 AM
the foam is just some packing foam i borrowed from
an empty box at work... i just used it to make absolutely
sure that the sub would seal in the hole... the gasket on
a buy one get one 3 year old sub is not exactly air tight...

when i load my SE it will be a lot nicer... that JBL was just
for testing really...

i know you said your glad its loud... but the SQ hasnt dropped
off hardly any... well for that sub it wasnt the best anyways...
but it didnt get any worse... just a lot louder... i cant wait to
get my SE in there...

where should a SSF be set to a box tuned to 32hz???????????????

the box is externally 21.5 wide about 16.5 tall and about 17 deep...
somewhere around there... its not exactly small... not sure the
exact dimensions off hand...

ANeonRider
12-07-2004, 11:42 AM
The subsonic frequency filter should be tuned to 1/2 octave below tuning.

What is an octave you say?

An octave does not have a predetermined value. A change in frequency of a multiple of 2, means a change of one octave. An octave has to have a starting point. If the starting point is 1000hz, one octave up is 2000hz. One octave down from 1000hz is 500hz. Equalizers commonly have one octave spacing between their slider controls.

So in your case, set the SSF to 32-[(1/4)32] = 24Hz

Nikuk
12-07-2004, 12:36 PM
looks alright, good job. And glad you like it... Now, imagine what it would be like with (2) 12's...

Here is where the addiction starts ;)

Again, good job.


-Nick

g30ffr3y
12-07-2004, 12:48 PM
thats basically like turning the SSF on and
barely turning it... which is pretty much what
i did... i wasnt too concerned with the sub
thats in the box now... but once i load my
SE in there i want to set it up right...

g30ffr3y
12-07-2004, 12:50 PM
i cant imagine it with 2 12"s... that would be
insane... it would even be insane with these
JBL's...

i want my SEs back!!! c'mon tomorrow hurry
up and get here...

thank nick!!!

hellomota
12-07-2004, 01:58 PM
Looks awsome. I am a noob and never built a box b4 myself. I was thinking of building sealed but after ur post I am not sure. Wanna help me to build a box? Since u prolly already did bunch of reserch and stuff. I have 2 10" alphasonics 200 serries lying around without roof over them it would be nice to place them in house with windows so screems could be herd miles and miles away :D.
Let me know if you have time to instruct me on the project.
Nice job.
-Greg.

g30ffr3y
12-07-2004, 02:44 PM
this was my first box... so i dont know if im the guy
to help you design anything so fancy with windows
and stuff... but id sure like to try and help... what
kind of vehicle??? for spacial reasons...

thanks everybody... box building is a great $$$
savings... i cant believe they get away with
charging 200$ for boxes at shops... maybe 100$
would be more fair... greedy shops...

i do recommend a table saw... with the circular
saw you have to be pretty **** accurate... its
a little nerve racking...

monte_carlo97
12-07-2004, 02:52 PM
looks good for a first. After a few more they will be flawless. Not bad at all though. Good work.

g30ffr3y
12-07-2004, 02:55 PM
looks good for a first. After a few more they will be flawless. Not bad at all though. Good work.



thats what im hoping... the box is too big for my
gf's car so im already going to be building another
one...

maybe ill let come caraudio members take a look
at the plans so i know ive got it right... but ****...
the box i built sounds great... so i hope i can do
it again...

id love to get "good" at it and be able to build
boxes for people... its kinda fun and the shops
are such a rip off... i could use some $$$ for
more of my own car audio... need some help
on the interior next...

monte_carlo97
12-07-2004, 02:58 PM
it will take about 4 to get it down ot a science. i hav built about 30 ported boxes.

hellomota
12-07-2004, 04:10 PM
this was my first box... so i dont know if im the guy
to help you design anything so fancy with windows
and stuff... but id sure like to try and help... what
kind of vehicle??? for spacial reasons...

thanks everybody... box building is a great $$$
savings... i cant believe they get away with
charging 200$ for boxes at shops... maybe 100$
would be more fair... greedy shops...

i do recommend a table saw... with the circular
saw you have to be pretty **** accurate... its
a little nerve racking...
Lol that was a joke by window I meant port. Well anyway my car is an old bimmer 635csi. And I have about 2.2 ft^3 to play around in the trunk. Here is the manual for the woofers I am using (its a psw210) http://www.alphasonik.com/200Series_Woofer.pdf My box is actually really simple. Its a right trapezoid looking that feets two woofers in it. So check it out and let me know if you are familiar with any of that stuff.
Thanks -Greg.

g30ffr3y
12-08-2004, 10:07 AM
just one more question out of this post...

what kind of carpet should i use for the box and where
should i get it...

i assume its just some sort of heavy duty indoor outdoor
stuff but i wanted to make sure... how much can i expect
to pay for enough to cover a 16.5 x 21.5 x 14.75 [externally]
inch box???

also... whats the best way to attach it? gorilla glue, staple gun???

thanks.

repo24
12-08-2004, 10:21 AM
you can use auto carpet from partsexpress.com. Most people attach it with spray adhesive, I usually use 3M super90. I think the carptet is only like 4-5 dollars per yard.

And about setting the SSF, it is also dependent upon the crossover slope...you don't set a crossover with a 6db/oct slope at the same point you do for one that's 24db/oct....

I *believe* the viper in your sig has 24db/oct though?? so you should be ok

Nikuk
12-08-2004, 04:16 PM
Geoff - DO NOT order carpet off the internet. Save yourself the time & shipping.

Run by Darryl's on **** Rd and pick up any of 4 colors for ~$4 a yard (54"x36"). Pick up a can of 3M spray adhesive for $2.97 at Valu or Home Depot. Get a cheap razor knife. Have fun.

Theres no reason to order everything off of the internet.

Check the SD tutorials in the subwoofer section for a good instruction/example thread.

-and-


And about setting the SSF, it is also dependent upon the crossover slope...you don't set a crossover with a 6db/oct slope at the same point you do for one that's 24db/oct....

What makes you say that?

g30ffr3y
12-08-2004, 05:19 PM
well... i went on a mission during my lunch break
and managed to get myself some remnant carpet
at GCO for 5$ !!! its plenty big and seems like its
going to be pretty sturdy so you cant go wrong with
that... its a little ugly blue... but for 5$ who gives
a crap...

i also got some spray adhesive at michaels craftss
for like 3 bucks or so... not sure exactly how much
but the adhesive and a reindeer stocking for the
girlfriend was only like 5.75$ so again... cant really
go wrong...

ill go through the tutorial and get to work making
my box look a little snazzier once i get home...

my SE's should be waiting at my door for me
according to FEDEX so...

WOOOOOOOOOHHHHOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!

not that my 3 year old single JBL 12" 125 watt isnt cutting
the mustard... but im happy to have my SE's home...


btw... about that SSF setting... i am not using the
bass gain db knob at all... i am just going to set my
input sensativity and crossover and not mess with
the phase or bass gain...

well i do have to set the SSF too... which is what the
question is about... it also ***** that they give you
this SSF with one side 20hz and one side 50hz and
you have to figure out where the hell 24 hz is...

Nikuk
12-08-2004, 06:47 PM
Keep in mind that most home carpeting mediums have some kind of backing... Most cabinet carpet has none to very little.
It may be a pain to work with the stuff from GCO.

Other wise, good luck!