Piercing the Peerless Soft Dome?

schwarcw
schwarcw Posts: 7,341
edited November 2006 in Vintage Speakers
I picked up a pair of Peerless soft dome tweeters off eBay. They arrived today, great condition. I bought them as I have been hearing one of the tweeters in my Monitor 7's acting up for several months now.

Polk pierced holes in the center of the Peerless domes to relieve pressure inside the dome. At least that's what I read here. I'm contemplating whether or not to pierce the domes on my newly arrived tweets. My first inclination is not to pierce it and see what it sounds like. Anyone have some experience to share as to the performance with and without the hole? Suggestions for piercing?
Carl

Post edited by schwarcw on
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  • DarqueKnight
    DarqueKnight Posts: 6,765
    edited November 2006
    schwarcw wrote:
    Suggestions for piercing?

    Make sure you wear clean rubber gloves use a sterilized needle.
    Proud and loyal citizen of the Digital Domain and Solid State Country!
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  • RuSsMaN
    RuSsMaN Posts: 17,986
    edited November 2006
    Polk used the tip of a hot soldier iron, I would leave well enough alone and not risk destroying a presumably clean pair of 810665's.
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • schwarcw
    schwarcw Posts: 7,341
    edited November 2006
    DarqueKnight wrote:
    Make sure you wear clean rubber gloves use a sterilized needle.

    I'll wipe the dome with some alcohol on a cottom swab too!;)
    Carl

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  • schwarcw
    schwarcw Posts: 7,341
    edited November 2006
    RuSsMaN wrote:
    Polk used the tip of a hot soldier iron, I would leave well enough alone and not risk destroying a presumably clean pair of 810665's.

    My thoughts exactly. I know some members have used the solder needle tip. I had visions of the dried silk dome surface lighting up, leaving me a jagged 1/4" diameter hole:eek:

    Carl
    Carl

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  • Polk65
    Polk65 Posts: 1,405
    edited November 2006
    I have a spare with the blowhole that works but is not a museum piece. It's yours if you would like for comparison.
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  • mrbigbluelight
    mrbigbluelight Posts: 9,833
    edited November 2006
    schwarcw wrote:
    I'll wipe the dome with some alcohol on a cottom swab too!;)

    Should this be performed by a rabbi, or can it be tried at home by a layman ?
    Sal Palooza
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  • univera
    univera Posts: 848
    edited November 2006
    mrbigbluelight wrote:
    Should this be performed by a rabbi, or can it be tried at home by a layman ?

    No, it must be done by a Shochate and the remnants buried in the ground. Also must be done on the 8th day of its new life....:)
    UNIVERA
    Historic Charleston SC

    2 Channel:
    SDA-SRS's RDO tweets
    Biamped Anthem 2 SE's w/1970's NOS Siemens CCA's
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    Master Bedroom Sony 40KDL-XBR3

    "I love it when a plan comes together." Hannibal Smith, The A-Team
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  • mhardy6647
    mhardy6647 Posts: 33,960
    edited November 2006
    I think the hole is probably there to break up standing waves on the dome. Isn't it interesting that Peerless, who designed the tweeter, made it with the dome intact but Polk decided it needed a hole in it?

    FWIW, I am sure y'all know the Peerless KO10DT tweeter was used in many, many speakers and also in DIY's. What you may not know is that early Teledyne-era Acoustic Research speakers used an OEM version of this same tweeter. I have a single, early AR14 with this somewhat unusual looking Peerless tweeter:

    oldAR14tweeter.jpg

    Here's a later AR-14 with a different tweeter:

    AR14tweeter.jpg

    And, finally, for comparison, here's a Polk Monitor 7A with the holey Peerless:

    Polkmonitor7Asn4900.jpg
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  • jakelm
    jakelm Posts: 4,081
    edited November 2006
    My Jennings Research uses the peerless tweeter too. Noticing what polk did, I took the tip of my soldering gun and tipped it. After I did it..I did noticed the Jennings were not quite as bright (alittle less harsh) but not affecting the stability of the peerless. Sounded alittle more natural IMO. But do it at your own risk..it is tricky, the dome melts quickly. So it doesnt take much touch at all.

    Jake
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
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  • RuSsMaN
    RuSsMaN Posts: 17,986
    edited November 2006
    mhardy6647 wrote:
    Isn't it interesting that Peerless, who designed the tweeter, made it with the dome intact but Polk decided it needed a hole in it?

    Not really, by doing so Polk made it 'their own'.

    Cheers,
    Russ
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • BlueMDPicker
    BlueMDPicker Posts: 7,569
    edited November 2006
    Is the hole a penatration? I've examined the Peerless tweets in my Monitor 11s extensively and get the sense it's a dimple.
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  • jakelm
    jakelm Posts: 4,081
    edited November 2006
    On my 7b's and the one I bought off of ebait, the silk is penatrated not just pushed in.
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
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  • mhardy6647
    mhardy6647 Posts: 33,960
    edited November 2006
    No jive-butt dimples; they's holes in mines'es
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  • ND13
    ND13 Posts: 7,601
    edited November 2006
    They said penetration!!!
    "SOME PEOPLE CALL ME MAURICE,
    CAUSE I SPEAK OF THE POMPITIOUS OF LOVE"
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  • BobMcG
    BobMcG Posts: 1,585
    edited November 2006
    I just looked over my four Peerless tweets and see that the tiny hole actually goes through the outer black dome and then is followed by an un-pierced off white layer. All four are holes look to be the same size and very uniform. I don't think that "I" could reproduce this nearly as well at home and so wouldn't try it unless it didn't matter if I messed up.
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  • schwarcw
    schwarcw Posts: 7,341
    edited November 2006
    BlueMDPicker wrote:
    Is the hole a penatration? I've examined the Peerless tweets in my Monitor 11s extensively and get the sense it's a dimple.

    Might be time for new bi-focals Mike:D
    Carl

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