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In Reply to: Well, it's a simple test and there's no need to disconnect the speakers... posted by John Elison on July 1, 2014 at 10:47:09:
John,
I'll repeat what I wrote since you may not have seen it.
Yes, to your test as far as it goes.
However, what if a driver is bad or 'weak' and is 5 or 6 octaves above your 100hz tone? You won't see it with a DVM.
I'd suggest using 3 or MORE frequencies. I wouldn't worry about the absolute voltage but rather the relative voltage and perceived output. Using a DB meter may help here, and that too, doesn't have to be accurate but rather repeatable.
Using a DB meter in concert with a DVM may help isolate room effects from a real malfunction.
I sure wish I owned a SCOPE. An old 60mhz or even a 30mhz TekTronix Dual Trace would be IT.
Too much is never enough
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Follow Ups
- RE: Well, it's a simple test and there's no need to disconnect the speakers... - pictureguy 16:53:33 07/01/14 (1)
- I have an extra one - airtime 17:18:52 07/01/14 (0)
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