Audioque and RE box calculator QUESTIONS

[d-REW 10+ year member]

yeah i has same prob when he gave me my measurements but it worked out fine.

 

[NB50 10+ year member]

I can tell you, but it doesn't matter what Aq box you put in that calculator. It will be off by 6-7hz. AQ says to multiply your cubic feet of what you want the box to be by 16, and that gives you the port area. Go to the calculator and you'll see. 8.5cu ft. x 16 = 136sq port area. Put these numbers in from top to bottom in the red fields.
49

18

25.5

25.5

0.75

8.25

0

You'll end up with 8.5cu ft. and 136 of port area. The calculator will give you all the dimensions at the bottom. Can you find my mistake?

There is no mistake the calc is wrong but not as much as you think. From my calculations I came up with 8.82ft^3 @ 32.5 Hz before sub displacement.

 

[Bass911 10+ year member]

There is no mistake the calc is wrong but not as much as you think. From my calculations I came up with 8.82ft^3 @ 32.5 Hz before sub displacement.

Yeah, but are AQ subs supposed to be tuned that low? I thought they needed higher tuning?

 

[SicAudio 5,000+ posts]

I fail to see how the calculator can tell the difference between a re sub and a different manufactures sub.

because when Greg did the Calculator he adjusted the parameters to accomadate an RE sub not an AQ sub or any other sub. call and ask him yourself.

 

[Bass911 10+ year member]

because when Greg did the Calculator he adjusted the parameters to accomadate an RE sub not an AQ sub or any other sub. call and ask him yourself.

No need to call! I believe you that's why I'll just do it like Dj said.

 

[fasfocus00 5,000+ posts]

I can tell you, but it doesn't matter what Aq box you put in that calculator. It will be off by 6-7hz. AQ says to multiply your cubic feet of what you want the box to be by 16, and that gives you the port area. Go to the calculator and you'll see. 8.5cu ft. x 16 = 136sq port area. Put these numbers in from top to bottom in the red fields.
49

18

25.5

25.5

0.75

8.25

0

You'll end up with 8.5cu ft. and 136 of port area. The calculator will give you all the dimensions at the bottom. Can you find my mistake?

alright based on what you gave, according to RE you're at 8.545 cubes tuned to 33hz without sub displacement. I am using my calculator for this and am coming up with 9.597 cubes tuned to ~37hz before sub displacement. don't know what the deal is with the net displacement but as stated the tuning frequency is off by a few.

 

[SicAudio 5,000+ posts]

yeah DJ is a great guy he knows better than anyone so you are in good hands //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

nice workup fasfocus it just further proves the point.

 

[sub-FATHER 10+ year member]

http://www.mobileinformationlabs.com/HowTo-1Woofer-Box-CAL%20Port%20lenth%201.htm

http://www.the12volt.com/caraudio/boxcalcs.asp#por

try others and then see which ones are about the same and then decide.

 

[SicAudio 5,000+ posts]

good idea tweeker //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[NB50 10+ year member]

because when Greg did the Calculator he adjusted the parameters to accomadate an RE sub not an AQ sub or any other sub. call and ask him yourself.

of course he'll say that, why would he want you to use his calculator for other subs. Ive seen the same flash based calculator on other sites and it still had the same problems. He did nothing to the program.

 

[NB50 10+ year member]

alright based on what you gave, according to RE you're at 8.545 cubes tuned to 33hz without sub displacement. I am using my calculator for this and am coming up with 9.597 cubes tuned to ~37hz before sub displacement. don't know what the deal is with the net displacement but as stated the tuning frequency is off by a few.

Better recalculate that.

 

[Bass911 10+ year member]

How do I do the math for moving the port to the middle for a common chamber box?

 

[fasfocus00 5,000+ posts]

Better recalculate that.

sure, why don't you do so as well b/c the box before any displacements is 10.89 cubes and the port displacement is ~1.6 cubes.

10.89

-1.60

=9.29 cubes

 

[SicAudio 5,000+ posts]

you dont have tocalculate for where the port is just the port itself. posistion is pretty irrelevant.

bromo learn math or gtfo i do boxes for a living as well as alot of other shit and re calc is wrong period.

 

[NB50 10+ year member]

you dont have tocalculate for where the port is just the port itself. posistion is pretty irrelevant.
bromo learn math or gtfo i do boxes for a living as well as alot of other shit and re calc is wrong period.

did you even do the math? doesnt sound like it or else you need learn basic math your self. I'm not doubting it is wrong.