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Midwest Audio Fest

It’s that time audio enthusiasts!

Registration for the 2019 Speaker Design Competition is now open! Visit midwestaudiofest.com for details and to list your speaker project.
We are excited to see all returning participants, and look forward to meeting some new designers this year, as well!

Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans.

We hope to see you this summer!

Vivian and Jill
2 of 2 < >

Midwest Audio Fest

It’s that time audio enthusiasts! Registration for the 2019 Speaker Design Competition is now open! Visit midwestaudiofest.com for details and to list your speaker project. We are excited to see all returning participants, and look forward to meeting some new designers this year, as well! Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans. We hope to see you this summer! Vivian and Jill
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Polyfill touching Crossovers

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  • Polyfill touching Crossovers

    Hi!
    Is it OK to have polyfill touching a crossover? Instinct tells me its ok - should be non-conductive and non-impactful to the crossover, but thought I should check. Any issues with heat from resistors? I've never had to consider it with ported boxes, and the sealed boxes I've built have always had a polyfill-free section for the XO. This happens to be a sealed box and it would be beneficial if I don't have to be terribly mindful of keeping the polyfill away from the XO. I of course don't intend to pack the XO with polyfill, but it may be in contact with parts of the XO

  • #2
    I keep the fill away from the crossover: resistors can get hot. I cover my crossovers with a piece of "fly wire", a fine metal mesh which is an essential material in Oz.

    Geoff

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    • #3
      I've done a few impromptu tests because I was concerned as well. Even with a lighter/fire directly on it, the polyfill just basically shrunk away/melted away from the flame... It really wasn't flammable, or the flame went away as soon as the flame I was creating was removed. You should be fine with direct contact IMO, but maybe do a test as I did to check with your specific brand of polyfill.
      TomZ
      *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
      *Part 2 *Gluing multiple curved laminations of HDF *Cello's Speaker Project Page

      *Building the "Micro-B 2.1 Plate Amplifier -- Part 1 * Part 2 * Part 3 * Part 4 * * Part 5 'Review' * -- Assembly Instructions PDF

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      • #4
        What those guys said. Plus, generally speaking unless you're really pushing the speaker, the resistors run cool.
        Francis

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