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Speaker break in - is it real?

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  • fdieck
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  • randyohoh
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    There is no doubt that the parameters of drivers change over time, but can a person actually hear any differences caused by minor changes? A person could take two identical drivers that have very similar measurements and thoroughly break only one of them in as described by Bill. Then do an A-B listening comparison including measurement, preferably with a few listeners, and with only a second or two between listenings. As previously stated humans have no memory for exact audio comparisons, or even other sensory comparisons like smell, taste, feel, and sight / color..

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  • billfitzmaurice
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    Originally posted by PWR RYD View Post
    Oh boy, bracing for another bunch of "LMAO" posts...
    Just wait until he graduates high school. Then he'll not just know everything, he'll have a diploma to prove it.

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  • PWR RYD
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    Oh boy, bracing for another bunch of "LMAO" posts...

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  • Unbiasedsound
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    You mean like Gurus judging the sound of a speaker based solely on there data using high tech pixie dust? LMAO

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  • billfitzmaurice
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    I run a lower than Fs sine wave at a high enough level to just approach xmax. Some use pink noise, but the point is to loosen the suspension and spider. A sine wave lower than Fs does that more effectively than pink noise with minimal power, and with the driver not mounted does so almost silently.

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  • zomby woof
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    Originally posted by billfitzmaurice View Post

    I always break in drivers before testing them in a prototype cab. Using accelerated break in it only takes overnight, and for the most part it just gets the driver to their published specs.
    What is accelerated break in?

     

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  • billfitzmaurice
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    Originally posted by Unbiasedsound View Post
    The fact that break in does occur proves that the speakers will sound different when not broken in.... It has been proven that many people can hear the difference of a speaker after its been broken in with or without the any objective data to back up there claims....So many speaker cables claiming it will make your speakers sound better....Can one hear the difference? Sure but sounding better is subjective.
    IMO if you really believe that you're in the wrong forum. Tech stands for technology, not pixie dust.
     

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  • Sydney
    replied
    Related From
    https://www.klippel.de/fileadmin/kli...asurements.pdf
    "This measurement can also be performed as an accelerated life test for separating fatigue from break‐in and assessing the long term stability of the suspension. "

    from:
    https://www.klippel.de/fileadmin/kli...on_Klippel.pdf
    "The time varying properties of the suspension are caused by reversible processes such as the viscoelastic behavior of the suspension. The temporary decrease of the stiffness after large peak displacement recovers slowly after removing the stimulus. The stiffness also varies with the ambient temperature, humidity of the air and the absorbed moisture in the suspension material." ( emp. mine ).

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  • Unbiasedsound
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  • billfitzmaurice
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    Originally posted by Unbiasedsound View Post
    I have read a lot of reviews where the reviewer states that the speakers sounded awful right out of the box and needs time to break in....
    I've never seen one of those reviewers post before and after measurements to back up that conclusion. Not that break in doesn't occur, but IMO subjective comments not backed up by objective data aren't worth reading. Neither are claims of being able to hear less than a 2dB difference in response, hearing more than 1/6 octave resolution, or having an auditory memory window of more than an hour or so duration.
    Some of them even say cold temps can affect it.

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  • kevintomb
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    Yes of course they "break in" some, but there is no easy way to measure how much the effect of accumulated listener familiarity with a new sound alters one's listening view.

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  • Unbiasedsound
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    I have read a lot of reviews where the reviewer states that the speakers sounded awful right out of the box and needs time to break in....Some of them even say cold temps can affect it.

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  • xmax
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  • xmax
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    I measured some Satori 9.5" woofers without being broke in, I have rocked them for a few days and I will be remeasuring them
    tomorrow. I will post the results.  

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