Monitor 10b woofer magnets came loose

Mr. Sharpe
Mr. Sharpe Posts: 1,354
in Vintage Speakers
My monitor 10b’s have been sitting at my parents house for a while while I was listening to some technics speakers of dads. I went to trade them back out and in one speaker the woofer cones were froze. Taking them out I noticed I could pull the magnet off the back.
y7tpcpq8w4m2.jpeg

What I don’t get was that one was pushed in and twisted and the other was pushed out. I know he hasn’t used them since he’s had them and he doesn’t have anything that could blow the speaker. I’ve tried and tried to reposition the magnet but by hand seems like a lost cause. And I just found out that the pole piece has been pulling to one side of the voicecoil when I put it in too so I’m done with trying with my hands. I need a way to fix this, surely there’s a way. They have replacements on eBay but I’d rather see if I can fix them myself
Home theater:
43” Westinghouse Displayer
Marantz UD-7007 Player
Emotiva MC-700 Processor
Adcom GFA-5006 Amplifier
Parasound Zamp Amplifier
Ethereal ESO-1 Power Conditioner
Klipsch RC-10 Center
Klipsch R34c Fronts
Klipsch RB-41 Surrounds
Polk audio PSW-505

Stereo:
Polk audio RTA-12c’s fully upgraded crossovers
DIY 12tc braided speaker cables
Denon DVD-5910ci Spinner
Parasound P6 Preamplifer
Parasound HCA -1500a Amplifier
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Comments

  • joebass3
    joebass3 Posts: 284
    Everything you need to know is here...
    https://forum.polkaudio.com/discussion/197152/diagnosing-fixing-shifted-polk-mw-drivers/p1
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  • pitdogg2
    pitdogg2 Posts: 25,436
    The flux of the magnetic field twisted them. As the magnet slid and twisted it's field changed and did what it did.
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  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    Thanks for both replies! I’ll get on this soon. If it’s a complete loss and only one driver is salvageable or both are lost for some reason I’ll get a couple used.
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
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  • pitdogg2
    pitdogg2 Posts: 25,436
    edited January 2023
    @lawdogg
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  • xschop
    xschop Posts: 5,000
    pitdogg2 wrote: »
    The flux of the magnetic field twisted them. As the magnet slid and twisted it's field changed and did what it did.

    It's very fluxtrating and fluxed-up at the same time.
    Don't take experimental gene therapies from known eugenicists.
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  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    I was really fluxstrated when I saw what happened to the drivers for sure
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter
  • jdjohn
    jdjohn Posts: 3,147
    Mr. Sharpe, I'm surprised you could have over 1,300 posts on this forum, and not be aware of this well-known issue with those drivers.

    Anyway, having the jig is the key to fixing these, and then you have many years of good playback in your future!
    "This may not matter to you, but it does to me for various reasons, many of them illogical or irrational, but the vinyl hobby is not really logical or rational..." - member on Vinyl Engine
    "Sometimes I do what I want to do. The rest of the time, I do what I have to." - Cicero, in Gladiator
    Regarding collectibles: "It's not who gets it. It's who gets stuck with it." - Jimmy Fallon
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  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    i don’t get on much anymore.
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter
  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    Aha! That thread was posted after I found the drivers like this. When I found the drivers seized I believe in June or July I looked at some threads on it but they were either too hard to understand or not well put together so I basically gave up. when I found out how much the drivers were that didn’t help lol
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter
  • xschop
    xschop Posts: 5,000
    As long as they ohm out you can fix them.
    Don't take experimental gene therapies from known eugenicists.
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  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    They both do:)
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter
  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    2tzzqz1azltp.jpeg

    Really didn’t want to remove the dust cap. Probably didn’t need to but too late now, I can put it back. I don’t think I’ll remove it on the other driver.
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter
  • Gardenstater
    Gardenstater Posts: 4,459
    edited January 2023
    It is possible to find thin and flexible plastic that is the right size to make shims. Mine are 0.0065" and were houseplant labels, Vigoro brand. You can also make narrow feeler gages out of computer printer paper that you can confirm where the pole piece is touching the voice coil former, besides visual method.

    PS: nice and clean dust cap removal. Are you a surgeon? :)
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
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  • xschop
    xschop Posts: 5,000
    Yep, perfect phase-plug candidate with that precision excision.
    Don't take experimental gene therapies from known eugenicists.
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  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    No I was just bein careful. These are still my babies lol

    And thank you
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter
  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    Done with the first woofer. Got the second one setting up in the jig. No scraping when I push the cone up and down. I left the dustcap on the second one, not sure why I removed the other but ok. I’m excited to hook the speakers back up. I feel like I should take the epoxy toall the other drivers in my polks! Don’t want it happening again
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter
  • pitdogg2
    pitdogg2 Posts: 25,436
    Yes you should do all the drivers prophylactically. Most of us do.
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  • txcoastal1
    txcoastal1 Posts: 13,281
    pitdogg2 wrote: »
    Yes you should do all the drivers prophylactically. Most of us do.

    Prevention works too

    Not like Mr Sharpe is worried about a disease or a STD ;)
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
    Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC

    erat interfectorem cesar et **** dictatorem dicere a
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  • pitdogg2
    pitdogg2 Posts: 25,436
    I let him decide that, it's not like I know where he's been 😁.


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  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    :D
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter
  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    hx2tt4sq0492.jpeg

    Just listening to Pyramid. I’m glad to have my 10’s working again but I’ve been spoiled to death by my rta12’s. It’s insane how different they sound. Even my son said the 10’s were bad compared lol I mean they aren’t awful but they aren’t fabulous either. They’re still my babies
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter
  • xschop
    xschop Posts: 5,000
    edited January 2023
    They look nice. Upgrade that tweeter to an RD0 (or wuhan) and then see what your son thinks.
    Don't take experimental gene therapies from known eugenicists.
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  • lawdogg
    lawdogg Posts: 455
    Nice work!
    <3 my 3.1TLs

    I will fix your shifted magnets for free. :)
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  • Mr. Sharpe
    Mr. Sharpe Posts: 1,354
    xschop wrote: »
    They look nice. Upgrade that tweeter to an RD0 (or wuhan) and then see what your son thinks.

    You gonna have to fill me in on that friend bc idk what it is😂
    Home theater:
    43” Westinghouse Displayer
    Marantz UD-7007 Player
    Emotiva MC-700 Processor
    Adcom GFA-5006 Amplifier
    Parasound Zamp Amplifier
    Ethereal ESO-1 Power Conditioner
    Klipsch RC-10 Center
    Klipsch R34c Fronts
    Klipsch RB-41 Surrounds
    Polk audio PSW-505

    Stereo:
    Polk audio RTA-12c’s fully upgraded crossovers
    DIY 12tc braided speaker cables
    Denon DVD-5910ci Spinner
    Parasound P6 Preamplifer
    Parasound HCA -1500a Amplifier
    · Share on FacebookShare on Twitter