Resonance of a speaker

Shrum · 31st March 2011

hy guys,
can someone give me the formula for calculating the resonant frequency of a for example speaker of 15 cm diameter?
Thanks!

muziqfreek · 31st March 2011

does this not get you slightly in the ballpark?

Let me google that for you

Oh look you're the 4th one down!

lol

digitrax · 31st March 2011

As a designer of speakers (leonspeakers.com - free plug), one of the best little tools you can get is this little thing from Parts Express called a WT3 (woofer tester) - it's about 100 bucks and in two seconds it will give you an impedance sweep of your driver.

Where the phase inverts and the impedance is lowest (Zmin) is your fs.

Beware: open air free resonance is not the same as in-cab.

Moreover resonance of the system will depend greatly on the environment (crossover, driver, baffle, cabinet, room).

31st March 2011	#1
Shrum Gear nut Joined: Feb 2010 Posts: 115 Thread Starter	Resonance of a speaker hy guys, can someone give me the formula for calculating the resonant frequency of a for example speaker of 15 cm diameter? Thanks!

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31st March 2011	#2
muziqfreek Gear addict Joined: Jan 2004 Location: UK Posts: 374 7 Reviews written	does this not get you slightly in the ballpark? Let me google that for you Oh look you're the 4th one down! lol

31st March 2011	#3
digitrax Lives for gear Joined: May 2006 Location: Ann Arbor, MI Posts: 518 1 Review written	As a designer of speakers (leonspeakers.com - free plug), one of the best little tools you can get is this little thing from Parts Express called a WT3 (woofer tester) - it's about 100 bucks and in two seconds it will give you an impedance sweep of your driver. Where the phase inverts and the impedance is lowest (Zmin) is your fs. Beware: open air free resonance is not the same as in-cab. Moreover resonance of the system will depend greatly on the environment (crossover, driver, baffle, cabinet, room).