Finding enclosure tuning frequency

 

Bronze Member
Username: Drumjunky

Boulder, Colorado

Post Number: 44
Registered: Nov-04
hey all

I have a beginner question about how you figure out what your sub enclosure is tuned to?

is this done by looking at the frequency response graph and my the maximum response frequency? or is it at the half power point (I think the variable is called F3)?

I have already built a box that was recommended by the manufacturer, so the defining variables are known already.

Thanks!
 

Bronze Member
Username: Drumjunky

Boulder, Colorado

Post Number: 56
Registered: Nov-04
bump
 

Bronze Member
Username: Redskin

LondonEngland

Post Number: 97
Registered: Dec-03
Download a free speaker design programme and enter your box volume and a tuning frequency and your port diameter then keep changing the tuning frequency till the programme tells you the port length you need is what you have. Or post your volume and port diameter and length and hope someone else will work it out . Or by transposing the formula....

Lv=[(1.463x100000000xR2)/(Fb2xVb)]-(1.463xR2)

......so you end up with Fb=whatever.
If anybody is actually going to do this
Lv=port length
Fb=tuning frequency
Vb=box volume
R=port radius
R2=radius squared
 

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