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Old 24th April 2008, 05:59 PM   #1
John L is offline John L  United States
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Default Testing Speaker Frequency and Efficiency(SPL)

I currently have a bunch of vintage speakers, of which I have no Idea how to match up with each other. I am referring not only to woofers, but misrange and tweater as well.

Unfortunatly, I have no idea as to how to generate a signal that will show a graph, and how efficient that signal happens to be. What will do this for me?

That way I will be able to match up the speakers in order to ge the best system.

Can anyone help me here?
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Old 24th April 2008, 09:51 PM   #2
gni is offline gni  United States
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There are several ways to test loudspeaker frequency response.
One involves a low value resistor (one ohm or less) and the
other uses a high value resistor (turns your amp into a current source).

You will also need a SPL meter if you want to know SPL, otherwise
this test will yield an impedance at each frequency. All values will
be free air.

You will need a tone generator. . .there are some available for
free on the internet.

Sorry, I cut my finger and can't type right now. . . more later
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Old 24th April 2008, 11:59 PM   #3
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Default Re: Testing Speaker Frequency and Efficiency(SPL)

Quote:
Originally posted by John L
I currently have a bunch of vintage speakers, of which I have no Idea how to match up with each other. I am referring not only to woofers, but misrange and tweater as well.

Unfortunatly, I have no idea as to how to generate a signal that will show a graph, and how efficient that signal happens to be. What will do this for me?

That way I will be able to match up the speakers in order to ge the best system.

Can anyone help me here?
Hi John L,
I hope gni gets better to give us his insight. I just want to post that the WT3 Audio Tester from PE might help you here.
http://www.partsexpress.com/pe/pshow...number=390-804
having in mind that's not for dB measuring (with mic and another software, for that you can look at TrueRTA and Mic in the bottom or in another page).
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