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Thread: "Break-in" time

  1. #1
    JBL Dog
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    "Break-in" time

    Just got my 2235H's back from being reconed and I've always heard they need a certain amount of "break-in" time.

    Any ideas how long that is? Also, does it require a test signal or is normal use fine?



    TIA



    This message comes from JBL Dog

  2. #2
    Senior Señor boputnam's Avatar
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    I'm certain you'll get a "smarter" response from Giskard, but in the past, I believe he's advised something on the order of say, +48-hrs, continuous play, with normal source (i.e., music) and nominal/soft volume.
    bo

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  3. #3
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    That was for these goofy super-duper capacitors they sell nowadays Bo

    You can run those 2235H's for a few hours at 20 Hz to get them softened up. I think it's 7 volts or 10 volts in at 20 Hz but I can't remember which. I'd have to look it up. Oh, and that's out of the enclosure too. If you wait for them to break in normally you'll be waiting a long time.

  4. #4
    JBL Dog
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    Originally posted by Giskard
    That was for these goofy super-duper capacitors they sell nowadays Bo

    You can run those 2235H's for a few hours at 20 Hz to get them softened up. I think it's 7 volts or 10 volts in at 20 Hz but I can't remember which.
    How can I generate a 20hz signal? I don't have any test equipment or a signal generator, etc.



    Can I, maybe, uh.... play some rap music laced with profanity for an hour or so and get the same result?



    This message comes from JBL Dog
    Last edited by JBL Dog; 11-06-2003 at 10:08 AM.

  5. #5
    Senior Señor boputnam's Avatar
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    Originally posted by JBL Dog
    How can I generate a 20hz signal? I don't have any test equipment or a signal generator, etc.
    I haven't tried this, but give it a look: http://www.esser.u-net.com/ttg.htm

    And, gimme a minute, I've got something that Rick Cobb had suggested for centering cones on resurrounds. Be right back...
    bo

    "Indeed, not!!"

  6. #6
    Senior Señor boputnam's Avatar
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    OK, a few Links from the trustworthy Rick Cobb, aka Mr. Surround, that he reports provide good source material for test tones:

    http://users.swing.be/hdepra/home/P22/E-sounds.html

    and,

    http://www.audioease.com/Pages/Free/MATTMain.html (Mac compatible)

    I've not tried these, but Rick has never steered me wrong...
    bo

    "Indeed, not!!"

  7. #7
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    Hey, Giskard…

    I was just thinking back to a warning you posted awhile ago. When you break-in the drivers, what do you mount them on so the vents aren’t flat on the bench?
    Last edited by Daniel B; 11-06-2003 at 11:02 AM.

  8. #8
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    I have a super high tech pair of 2x4's that I sit them on while they break in.

  9. #9
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    Hey! That 20Hz test clip doesn't work! I played it over my computer speakers and it was just silence.....

  10. #10
    gyusher
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    Pink noise

    I have used pink noise at a level of 1 watt output for a 24 hour minimum. I would place the speakers face to face and throw a blanket over them and let them go. . .This was recomended to my by Paridigm once when I bought some of their speakers. . .I will say it does loosen things up or so I thought at the time. . .

  11. #11
    Senior Member Guido's Avatar
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    Originally posted by JeffW
    Hey! That 20Hz test clip doesn't work! I played it over my computer speakers and it was just silence.....
    Hey! We all hope that this is a joke.

  12. #12
    Senior Member Guido's Avatar
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    Originally posted by Giskard
    That was for these goofy super-duper capacitors they sell nowadays Bo

    You can run those 2235H's for a few hours at 20 Hz to get them softened up. I think it's 7 volts or 10 volts in at 20 Hz but I can't remember which. I'd have to look it up. Oh, and that's out of the enclosure too. If you wait for them to break in normally you'll be waiting a long time.
    You once posted 20Hz for 4 hours with 10 Volt.

    Oh, and the driver should sit on the high tech pair of 2x4's for ventilation

  13. #13
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    You got it Guido!

  14. #14
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    Originally posted by Guido
    Hey! We all hope that this is a joke.
    Yes, a joke...I have my PC set up as a source for my entertainment center as well. I don't think my PC speakers have much frequency response at 20Hz... I could barely hear it if I turned it up pretty high.

    I guess my didn't get the point across...

  15. #15
    Senior Señor boputnam's Avatar
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    Originally posted by JeffW
    Hey! That 20Hz test clip doesn't work! I played it over my computer speakers and it was just silence.....
    Whoa... That's amazing! If a manufacturer, you could advertise they work to 20Hz (@ -120 dB)...

    [Yea, your did work great - pretty hilarious. Just that I was sleeping through it all.]
    bo

    "Indeed, not!!"

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