will this work????

[Pioneer~Saturn 5,000+ posts]

Looks like your teacher should've sent you to ca.com....the ultimate in math teaching technology //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[liljojo4711 10+ year member]

k cool. so i need a bigger box then. how about this:

36 wide

13.5 high

12 deep

2.5" port

15" port length

2.015 before disp.

34.98 tuning

after all disp. that gives me 1.83cu^ft and mark recommended 1.8 so thats good. what about port noise? am i good if i just round the edges of the port? wont the tuning change after i add bracing because there will be less space? how do i compensate, i want 35hz tuning.

 

[Innovative:Cory 10+ year member]

Looks like your teacher should've sent you to ca.com....the ultimate in math teaching technology //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I chuckled //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

but instead of dividing by 12 three times,......isn't it just easier to divide by 1728...and yes I know its the same thing, but what if the finger slips on the calculator?

 

[Pioneer~Saturn 5,000+ posts]

If you could manage to make the depth just a bit larger that would give you a little more airspace and also lengthen the port, tuning it a bit lower. But that box wouldn't be a bad option at all

 

[Innovative:Cory 10+ year member]

New box dimensions would do fine, if you round the edges of the port it will help a lot!

 

[Pioneer~Saturn 5,000+ posts]

I chuckled //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

but instead of dividing by 12 three times,......isn't it just easier to divide by 1728...and yes I know its the same thing, but what if the finger slips on the calculator?

I was actually about to say just devide by 1728...but instead I wanted the class to see what was happening, step-by-step //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[liljojo4711 10+ year member]

will bracing change tuning?

 

[Pioneer~Saturn 5,000+ posts]

will bracing change tuning?

VERY little unless you buck-wild with it...it'll just change the airspace a little bit.

 

[Innovative:Cory 10+ year member]

VERY little unless you buck-wild with it...it'll just change the airspace a little bit.

That is why you build a little bigger to compensate for the bracing...//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[liljojo4711 10+ year member]

so not enough to worry about then. i just want 1.8cu^ft tuned to 35hz after all disp.

 

[Pioneer~Saturn 5,000+ posts]

^nope

but yea...making it just a little bit deeper would compensate for the loss in airspace from bracing and also tune it a little lower, which should sound better and get louder in the lower frequencies

 

[Innovative:Cory 10+ year member]

You should be good with the second box..

 

[liljojo4711 10+ year member]

^nope
but yea...making it just a little bit deeper would compensate for the loss in airspace from bracing and also tune it a little lower, which should sound better and get louder in the lower frequencies

i really cant go any deeper. its goin in a mustang and i will not have much space to begin with... what do u mean by "louder"?

 

[Pioneer~Saturn 5,000+ posts]

^I mean your enclosure will have a higher output (sound louder) at lower frequencies...so those lows will hit hard

 

[liljojo4711 10+ year member]

mark said to go with 1.8cu^ft tuned to 33hz after displacement so im just going to go with that i guess. is there a noticeable difference between 33hz and 35hz? what is the difference?