What am i tuned at?Cu Ft?

[BigEM 10+ year member]

i tried to finds out by myself but i couldnt get it right, so i build a box that is 32X20X16 and i put 3 4" by 9" aeroports, so i was wondering what is my tuning at and what is th ecu ft i got??

thanks in advance, EM

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[Worlddre 5,000+ posts]

ports flared on both ends?

 

[xluben 10+ year member]

~4.5 ft^3 @ 43 Hz

I used your dimensions as outer dimensions and assumed 0.75" thick MDF. Also, I did not assume any port displacement, so net volume will actually be bit less, and tuning will be ~1 Hz higher.

Try making the ports 16.25" (longest possible assuming ports on baffle and 20" deep box). That'll get you 4.35 ft^3 @ 34 Hz

Yeah, and I assumed ports flared on both ends.

 

[Worlddre 5,000+ posts]

5.925ft3 gross

(32 x 20 x 16) / 1728

gets gross internal volume

 

[BigEM 10+ year member]

yeah ports have flares at both ends. so what could i do to lower my hz's i think 43 is too high, but what does it really mean when its that high and if i lowered it what would it sound like??

later, em

 

[ruger 10+ year member]

2 ways to lower your hz

1. make the box bigger

2. make the ports longer

here is a port calculator

http://psp-inc.com/psp-inc.com/public_html/..%5Ccgi-bin%5Cport_length_calculator.cgi

 

[BigEM 10+ year member]

is 43hz good or is it bad??

later, em

 

[squeak9798 5,000+ posts]

is 43hz good or is it bad??
later, em

Sound quality and low end capabilities will be compromised, but output should be pretty high.

Generally most street beaters prefer a tuning in the 30-35hz range, maybe into the upper 30's depending on the style of music they listen to.

43hz is, IMHO, too high.

 

[xluben 10+ year member]

5.925ft3 gross
(32 x 20 x 16) / 1728

gets gross internal volume

gross = external volume

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