vibration and microphonics in XO caps

mmadden28
mmadden28 Posts: 4,283
edited September 2010 in DIY, Mods & Tweaks
Is vibration and/or microphonics an issue in internal crossovers?

I have plenty of small, otherwise unusable pieces of Dynamat Extreme available as leftover from Dynamatting my drivers. Would it be worthwhile to put a small piece on any of the caps, inductors or boards? Or would that actually be detrimental?

I noticed either foam tape or is glue in use in a lot of the original boards-I'm assuming that was intended to address the same issue?? or is that just used to secure the parts from flopping around?

Is hot gluing (sp?) components just as good a solution?

Thoughts?
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Pool: Atrium 60's/45's
Post edited by mmadden28 on
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  • amulford
    amulford Posts: 5,020
    edited September 2010
    my thought is you have WAY too much time on your hands...:p
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  • mmadden28
    mmadden28 Posts: 4,283
    edited September 2010
    amulford wrote: »
    my thought is you have WAY too much time on your hands...:p

    lol ;)

    Well I'm upgrading my XOs now and figured while I have them out...
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    This post is a natural product. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects.

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    2-chnl : Pio DV-46AV (SACD), Dodd ELP, Emotiva XPA-1s, XPA-2, Odyssey Khartago, LSi9, SDA-SRS 2 :cool:, SB Duet, MSB & Monarchy DACs, Yamaha PX3 TT, SAE Tuner...
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  • Face
    Face Posts: 14,340
    edited September 2010
    In my personal speakers, I mount the components to 3/4" MDF via zip ties and hot glue(sparingly on resistors). Then bolt the MDF boards to the cabinet.

    Dynamat may be ok on caps, but I would keep it away from everything else.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • skrol
    skrol Posts: 3,387
    edited September 2010
    I've wondered about this too. It seems like the components are still subject to vibration even with glue and tie-wraps. Why isn't it common practice to mount the XO externally?
    Stan
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

    HT:
    Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
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  • mmadden28
    mmadden28 Posts: 4,283
    edited September 2010
    Face wrote: »
    In my personal speakers, I mount the components to 3/4" MDF via zip ties and hot glue(sparingly on resistors). Then bolt the MDF boards to the cabinet.

    Dynamat may be ok on caps, but I would keep it away from everything else.

    I'll do that later when I really have some spare time. :o PtP with some nice new foil inductors and higher end caps and resistors.

    What really got me curious about this was mainly the caps. I have a soup can 91µF film cap here, that essentially rings when I wrap my knuckles against it. Its also present in smaller film caps, just not as obvious. So that got me wondering if that can have any negative affect on anything audible.

    I'm sure I'll never know for sure, but really wanted to be sure I didn't add to any issues.


    So I'll continue Hot Gluing as I have been (minus the resistor), and add a small scrap of Dynamat to the caps where possible.

    Thanks Mike
    ____________________
    This post is a natural product. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects.

    HT:Onkyo 805, Emotiva XPA-5, Mitsu 52" 1080p DLP / polkaudio RTi12, CSIa6, FXi3, uPro4K
    2-chnl : Pio DV-46AV (SACD), Dodd ELP, Emotiva XPA-1s, XPA-2, Odyssey Khartago, LSi9, SDA-SRS 2 :cool:, SB Duet, MSB & Monarchy DACs, Yamaha PX3 TT, SAE Tuner...
    Pool: Atrium 60's/45's
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  • mmadden28
    mmadden28 Posts: 4,283
    edited September 2010
    skrol wrote: »
    I've wondered about this too. It seems like the components are still subject to vibration even with glue and tie-wraps. Why isn't it common practice to mount the XO externally?
    Stan

    I guess the question is how much of an impact does vibration cause to make it worth doing???. I just read a recent thread on the external XO and believe the general consensus was the hassle of the extra external wires and such was a negative factor.
    ____________________
    This post is a natural product. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects.

    HT:Onkyo 805, Emotiva XPA-5, Mitsu 52" 1080p DLP / polkaudio RTi12, CSIa6, FXi3, uPro4K
    2-chnl : Pio DV-46AV (SACD), Dodd ELP, Emotiva XPA-1s, XPA-2, Odyssey Khartago, LSi9, SDA-SRS 2 :cool:, SB Duet, MSB & Monarchy DACs, Yamaha PX3 TT, SAE Tuner...
    Pool: Atrium 60's/45's
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