different box calculators have different tuning...

[a_steezy]

i built a box using the re box calculator tuned to 37.6hz.

i just re-checked my work here

http://www.mediafire.com/?2ypo0iymlum

and it's saying in the end it's 44.7hz

both have the same dimensions and they both say the same 'box volume' but tuning is off...

opinions?

how do you take screen shots so i can post up unless you guys wanna punch it in yourself and play with it

40" wide 14" tall 16" deep

port is 3.5"x12.5" and 11" long

Edited November 3, 2009 by a_steezy

[Decaf]

sub displacement and end correction factor are usually what changes tuning

and if u use a square vs slot port since the amount of extra wood displ is different with each

give me a sec ill see what i get

what sub(s)

[Torres]

the RE calc is known to not be very accurate. putting those dimensions in my calculator, i came up with around 43 hz myself.

and to take screen shots, press the PrtScn (print screen) button on the top right of your keyboard. then open paint, paste it there, resize or crop if you need/want, then save it and upload it to photobucket or wherever you put your pics

EDIT: ^what he said, tho i think 7 hz is a BIG difference between the two. i did see someone tho put their total length in the port in the 'length 2' box which told the RE calc that the port was that long, plus the length of whatever the box was. so it made it super long.

Edited November 3, 2009 by ExpoSport

[a_steezy]

the RE calc is known to not be very accurate. putting those dimensions in my calculator, i came up with around 43 hz myself.

and to take screen shots, press the PrtScn (print screen) button on the top right of your keyboard. then open paint, paste it there, resize or crop if you need/want, then save it and upload it to photobucket or wherever you put your pics

EDIT: ^what he said, tho i think 7 hz is a BIG difference between the two. i did see someone tho put their total length in the port in the 'length 2' box which told the RE calc that the port was that long, plus the length of whatever the box was. so it made it super long.

its the 15" lvl 4

i have sub displacement at .15" but i also set it to 0 and didn't change to much, i'll take screen shots

but fawk, 44hz is a little high for my likings and it's a badass box... hah

and for the re calculator, just put 0 for second port length or whatever, the 11 inches is in the first part

Edited November 3, 2009 by a_steezy

[Decaf]

i got

[email protected] with no bracing accounted for

with bracing it should bring u up to [email protected] depending what u do

[a_steezy]

i got

[email protected] with no bracing accounted for

with bracing it should bring u up to [email protected] depending what u do

damn...

i did a double baffle and a little triangle, type brace in the center

[Torres]

ok. post up some pics of both calcs so we can see what the differences are

[a_steezy]

just figured it out, had to reset p-bucket password and such

[Decaf]

just keep using andym85's calc or expos

personally i like andy's because u see the math and equations he uses... and u can do aeroports/circular ports

did u put the correction andym85(amatt85) said to enter into cell H iirc?

can u tell me what u have for cell H17 please... it should be

=IF(A21<=L17+(J7-B18),A21-L17,J7-L17)

Edited November 3, 2009 by Decaf

[Decaf]

ok there are two big differences

pay attention to the lengths of the port pieces... this is where its off

in andym's... the actual wood length is 9.25"... his accounts for sub displ

in the re it is 11"... does not account for sub displ (do u see how it says total port length of 17.75... this is why its lower)

so shrink the box on ROE .15cuft by shrinkin one of the dimensions (ur gonna have to use tenths) and enter in 8.5" and you should have very similar tuning

(takes a bow)

Edited November 3, 2009 by Decaf