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View Full Version : Type R vented box HELP



timpact14
01-04-2008, 12:35 AM
running 1 1222d @ abt 500w rms in a 1990 chevy blazer. im limited in the space, i have abt 26"w(max) x 14 - 16"h x 14 - 16"d. looking to tune it to abt 30-32hz with abt 1.6 to 1.8 cuft....the plan below is almost perfect, if i can figure out how to make the width to abt 25.5" and keep the cuft and tuning close...any help greatly appreciated. thx

http://img62.imageshack.us/my.php?image=16cubes32hz25sqin9rn.png

PSturmer
01-04-2008, 12:39 AM
just use this.....

your gonna want it 2 cubes net with about 35-40 sq inches of port area.

http://www.subwoofertools.com/forum/ported-box.asp

miker
01-04-2008, 12:39 AM
1.5" wide port.. so the port walls are 11.75in, and 8in.

PV Audio
01-04-2008, 12:47 AM
If I were you, I would make it ported instead of vented.

timpact14
01-04-2008, 01:01 AM
oops! i meant ported. let me give this program i try

miker
01-04-2008, 01:02 AM
Search google, for the RE box caculator.

timpact14
01-04-2008, 01:19 AM
this is what i came up with..what do u guys think?

http://www.subwoofertools.com/forum/ported-box.asp?Ew=25.00&Eh=16&Dia=6&Xmax=18.1&Vd=.071&NumW=1&Vb=2.0&Fb=32&Qts=&Vas=&Fs=&CE=0

miker
01-04-2008, 01:20 AM
You would get more air space doing a right angle port...

timpact14
01-04-2008, 01:25 AM
r u talking abt the port pieces cut @ a 45 degree?

miker
01-04-2008, 01:29 AM
No? http://www.reaudio.com/speaker_box/LPort_Box_Calc.html

timpact14
01-04-2008, 01:38 AM
cool, thx man i like this program better

BuckyBoy
01-04-2008, 01:47 AM
http://i251.photobucket.com/albums/gg294/SMCustomz/SM%20Customz/232-.jpg
26Wx15Hx16D
2ft^3@32Hz
If you want all the dimensions PM me.

BrianChia
01-04-2008, 11:51 AM
If I were you, I would make it ported instead of vented.

It's the same thing. :)

PSturmer
01-04-2008, 05:44 PM
this is what i came up with..what do u guys think?

http://www.subwoofertools.com/forum/ported-box.asp?Ew=25.00&Eh=16&Dia=6&Xmax=18.1&Vd=.071&NumW=1&Vb=2.0&Fb=32&Qts=&Vas=&Fs=&CE=0

its good. but i would make it 2.5 net if you can.

PSturmer
01-04-2008, 05:55 PM
You would get more air space doing a right angle port...

umm no you wouldn't. you get a better port length to volume ratio with a 180 degree turn vs. 90 degree

BrianChia
01-05-2008, 12:47 AM
That is true but you also get more port noise that way. The less the port turns the better, and you can thus use less port area and a shorter port.

PV Audio
01-06-2008, 02:42 AM
It's the same thing. :)Nope, not the same thing. :eek:

PV Audio
01-06-2008, 02:43 AM
**** brian, you're a may '07, you wouldn't know what I'm talking about :(

Suffice it to say, a dear member here, among other things, tried to convince the forum that vented and ported were two completely different things :laugh: