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twinkieC405
06-26-2004, 11:45 PM
Well i've decided to build my own ported box after hearing it in the sealed box i want louder so i'm porting the dual 10 in. type-r's.

-first of all i need plans which im prob. going to get from gnomeaudio.com.
-i'm going to tune it to 30Hz and the max dimensions are: W:30" L:24" H:15"
-i'm going to buy a large sheet of high grade MDF from a local sound shop (Sound Perfections), i know i'll need that Liquid Nails stuff from home depot but i'm not sure what exact nails i should use for this stuff (i know also that i have to predrill each hole).
-then after i'm done building the box i'm letting the guy at Sound Perfections carpet it for me since the stuff he uses almost exactly matches my trunk carpet.

What exact nails should i use for the box?
What kind of cutting blade should i use for the wood so i dont splinter it?
What kind of caulk should i use for the inside of the box?
how many cubic feet should i go with?

Any help or tips or advice any box builders can give me would be great since this is my first box.

DBfan187
06-26-2004, 11:59 PM
What is the independance of the sub? 4ohm SVC, 4ohm DVC, 2ohm DVC?

4.773^3 seems kinda big for those subs. port would be 13.5" x 2", 13" long, 27^2" of port = 30Hz.

BayAreaNB
06-27-2004, 12:07 AM
mike he said MAX dimensions are those stated

twinkieC405
06-27-2004, 12:12 AM
yeah sorry those are max dimensions....but now i'm debating what freq. i want to go with 30Hz seems like it wont be able to get loud enough.....should i think about like 34 or 35Hz? and if i do how much SQ will i lose?

DBfan187
06-27-2004, 12:13 AM
mike he said MAX dimensions are those stated
Yea, I just now saw that too. I'm an idiot! So what else is new?

twinkieC405
06-27-2004, 12:18 AM
i have dual 10in Type-R's DVC 4ohm

DBfan187
06-27-2004, 12:21 AM
eh, one thing I hate about these programs is that they never agree on the port size.
BBP6 says - 18.95" long for 33Hz
WinISD says - 17.9" for 33HZ <----I go by that:D

Try 3.076^3 ,14H x 30L x 18L, 33Hz. Port would be 13.5" x 2", 17.9" long for 27^2" of port.

You shouldn't lose mush in SQ, but you will gain a little in SPL.

I like my boxes tuned from 32 - 34Hz.

twinkieC405
06-27-2004, 12:27 AM
awesome!....but i dont understand the port stuff i understand the H:14" W:30" L:18" but the other part u lost me! sorry i'm a newcomer.

could u help me understand or draw what you mean? that would be a great help.

i think i'm gonna go with 33-34 but i def. want it to be able to get really loud so what would change if i went to 34Hz?

btw....how many cu. ft. is that box?

DBfan187
06-27-2004, 12:32 AM
Port area is measured in sq. in. 13.5*2=27sq. in. of port.

your port would be 13.5" Tall by 2" wide, 17.9" long. (ports can bend. Just make sure you keep the same width in the port in every bend - if you have to;))

twinkieC405
06-27-2004, 12:33 AM
so since my box is only 18" long and the port needs to be 17.9" long i NEED to bend the port?

what would be the port dimensions for a 35Hz box?

DBfan187
06-27-2004, 12:38 AM
so since my box is only 18" long and the port needs to be 17.9" long i NEED to bend the port?

what would be the port dimensions for a 35Hz box?
WinISD says 16.61" long for a 34Hz tuning.

35Hz = 15.44" long.

twinkieC405
06-27-2004, 12:45 AM
i know this is a REALLY newbie question but are the box dimensions external or internal?

DBfan187
06-27-2004, 12:48 AM
external

internal is 12.5H x 28.5W x 16.5L

that's using 3/4" MDF too.

twinkieC405
06-27-2004, 12:49 AM
i think i have it narrowed down to either 34 or 35Hz, my dilema is that i dont want to lose much SQ but i def want it to get LOUD!, which way should i go?

DBfan187
06-27-2004, 12:55 AM
either or.

A lot of people say the lower, the better SQ. I just like the low 30's b/c it gives a good mix of SQL.(SQ and SPL combined.) Try 34.

twinkieC405
06-27-2004, 12:58 AM
so right now i basically have all the dimensions i need to build the box? SAWEET....i was thinking about using gnomeaudio.com but with this i dont think i need it.

DBfan187
06-27-2004, 01:00 AM
Glad to of your assitance!:D

twinkieC405
06-27-2004, 03:33 PM
ok i follow everything so far but how do you suppose i make a port size of 13.5" tall when the box itself is only 12.5" (14" external)????not sure i understand how to work that one.

DBfan187
06-27-2004, 04:09 PM
ok i follow everything so far but how do you suppose i make a port size of 13.5" tall when the box itself is only 12.5" (14" external)????not sure i understand how to work that one.
Yea, that was a typo, sorry. I hope you didn't cut anything yet?:crying:

3.076^3 ,14H x 30L x 18L, 33Hz. Port would be 12.5" x 2", 15.23" long for 34Hz - 25^2" of port. For 35Hz - 14.14" long!



Hope this helps better than the last?:wacky:

twinkieC405
06-27-2004, 04:51 PM
any suggestions then for cutting the dual 10in circles to keep them equal distance from everything (up and down)?

the_flatlander
06-28-2004, 02:45 AM
find the center of the sub and mark it in the center of where your putting the sub

twinkieC405
06-29-2004, 01:00 PM
Last question: when you say how long the port is do you mean from the front outside of the box or the front inside of the box?

how long would the port have to be in that box for 30Hz? just as a comparison.

DBfan187
06-29-2004, 08:29 PM
Last question: when you say how long the port is do you mean from the front outside of the box or the front inside of the box?
YES!

how long would the port have to be in that box for 30Hz? just as a comparison.
WinISD says 20.73"(bend the port, L shaped)

Trixter
07-01-2004, 09:03 PM
Last question: when you say how long the port is do you mean from the front outside of the box or the front inside of the box?

If the front of the box is going to be part of the port, then subtract .75" from the port length when you cut it.

http://img17.exs.cx/img17/219/untitled144.jpg