Burnt Voice Coil MW6500 and MW6511

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  • xschop
    xschop Posts: 4,832
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    I trried it in the 8TLs yesterday while I was working on some stuff at the shop. They sound correct in that x-over. Midrange was definitely veiled in the 5Bs.
    Don't take experimental gene therapies from known eugenicists.
  • xschop
    xschop Posts: 4,832
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    I'm still interested in dissecting, measuring and repairing a 6511 if anyone has one lying around mag-shifted or burnt coil. Let me know. Thanks, Rob
    Don't take experimental gene therapies from known eugenicists.
  • xschop
    xschop Posts: 4,832
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    Self-bump. Still looking for a burnt 6511 or two.

    Don't take experimental gene therapies from known eugenicists.
  • VSAT88
    VSAT88 Posts: 1,235
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  • Gardenstater
    Gardenstater Posts: 4,280
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    After reading the Stereo Review analysis of the SDA 1C (Nov 89), I noticed that he said that the drivers employed edge wound voice coils. That would be the 6510 and 6511. Just an interesting lil factoid. I wonder how many other Polk drivers use that method of increasing Bl, and what model was the first.
    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
  • xschop
    xschop Posts: 4,832
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    The last two 6510's I had apart, I either didn't look close enough or the coils looked same as any other driver I've had apart.

    Now all other dimensions and materials between a 6503 and 6510 look exactly the same, even suspension hang, but now wonder what voice coil difference is.

    Of all the drivers, the spiders are all thin- weave except 6502's which have a stronger, thicker weave.
    Don't take experimental gene therapies from known eugenicists.
  • Gardenstater
    Gardenstater Posts: 4,280
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    Just for the record, on my 1979 MW6500s I measure ID: slip fit to a 1.010 plug gage. OD: not round 1.057max, 1.054 min.
    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
  • xschop
    xschop Posts: 4,832
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    PM if you have any burnt-coil 6510's laying around.
    Don't take experimental gene therapies from known eugenicists.
  • chrispyfur
    chrispyfur Posts: 170
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    If I can find a good replacement for my 6511 with a damaged/glued surround I could send that one your way if you're interested
  • xschop
    xschop Posts: 4,832
    edited August 2023
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    Post a pic. I may be able to repair it for you.
    Don't take experimental gene therapies from known eugenicists.
  • xschop
    xschop Posts: 4,832
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    Need 1 more burnt/mangled coil 6511 if you have one laying around.
    Don't take experimental gene therapies from known eugenicists.