What is your process when a speaker comes back from a rental to make sure it is still in good condition?
Tone sweep will tell you what you most need to know - is everything working and working without mechanical damage. Where this falls down is multiple drivers in the same passband. An example would be something like a JBL vertec with four mid drivers in series parallel. Any one driver out means one pair is not working. In cases like that you need a piece of plywood to cover one pair of drivers to confirm both sets are working. Music testing, pink noise testing don't tell you what you need to know about speaker damage. A five dollar phone app with a sine wave generator does.
We currently use this method and it seems to work about 90% of the time. Do you know of a full proof tester that will take the guess work out of the equations? Im looking to take the human error factor away.
Any testing needs to be 100% repeatable. That means the testing environment must be identical, every time & every test.This could require a combination of impedance measurements and acoustic performance verification to de-humanize the testing, too.Edit PS - +1 to Josh's suggestion of the Dayton DATS v2.
Tim,The repeatability factor is the tough nut for most to crack, as it either requires a spot well away from movable objects outdoors, or a dedicated "test room" that does not change.Just got off the DIY forum, where "Patrick Bateman" just mentioned he's had three DATS "blow up".REW, a freeware program does good impedance testing, as well as dual FFT, etc., but requires a simple test jig to be made.I plan to make that jig as soon as I finish approximately 125 other items on my backlog of items on the "to do" list.I did finish wiring my water heater 3/18/17, had my first hot shower since 12/10/17, the day my credit card was hacked for the first time..Art "Titanium Cranium" Welter
REW, a freeware program does good impedance testing,
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