The break in procedure was 20Hz with 30V input for 3 hours.
Ivan,I expected 'more' after burn-in … I suspect the coil was still warm(er) when you took the 'after' measurement ?Both measurements are equal at frequency, where impedance is high, I guess port must kick in there somewhere ??Thank you for sharing. I'm a bit ashamed I never did this myself.Respectfully
Thanks for posting this, Ivan. I've long thought that "break-in" was a criminal act, not a loudspeaker thing. Your measurements appear to confirm this.
I know guitar speakers sound slightly harsh and hashy sounding till you beat um up a little.I know guys go as far as spraying the cones with fabric softener and running a 60cycle hum from a variac through um for hours and some remove the outter doping from the surround.Warren Haynes I guess blasts music trough his Marshall cabs for something like 24hrs to break um in.
Except now you've gone into the deep end of speaker superstition pool...yes, it may change the sound running the driver through the wash, but it's really-really-really a subjective area.Also, any comparisons made involving a cold or hot voice coil are not part of the equation, that's a different phenomena unrelated to possible "break in" issues with a driver.Best regards,John
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