Question about Tweeter on SDA2

BonnyM
BonnyM Posts: 17
edited November 2020 in Vintage Speakers
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Hello,
My first question in this forum (just joined).
I recently bought a pair of SDA2s.
One tweeter (SL1000) does not work. Guy selling did not disclose obviously:(
I have 2 extra SL1000s. Tried them too. None worked.
Tried swapping fuses on back too. What could be wrong? Will Appreciate help.

Best Answers

  • Gardenstater
    Gardenstater Posts: 4,136
    Answer โœ“
    If you put in MW6501 Polk there are 3 sellers on eBay right now. Polk hasn't sold these drivers for a number of years and they don't support them anymore. eBay is your best bet.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    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
  • Gardenstater
    Gardenstater Posts: 4,136
    edited December 2020 Answer โœ“
    I honestly would stick with the MW6501 rather than trying to substitute an MW6500 or MW6503. There are small differences in the Thiele Small Parameters, namely DC resistance and Total Q:

    https://forum.polkaudio.com/discussion/133992/thiele-small-parameters-for-mw6500-drivers

    I cannot personally vouch for those Midwest Speaker or Parts Express speakers that may purport to be the best available match for certain MW Polk models. That would be a bit risky in my opinion. Just make sure if you buy from a eBay seller to ask them if there is any voice coil rubbing and to tell you what the DC Resistance is if possible for them and to ask them to ship them with plenty of cushioning so that the magnets don't get jarred and shift during shipping.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    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

Answers