Early Model 7 Midwoofers

Gardenstater
Gardenstater Posts: 4,502
edited November 30 in Vintage Speakers
Could 1975 Model 7 have possibly used this 6W10R CTS midwoofer, as this eBay seller is saying? Date code is 7503; 3rd week of 1975. Serial # pretty high at 44922.

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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
Post edited by Gardenstater on
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Comments

  • DeRod
    DeRod Posts: 58
    edited November 30
    I ran across that sale when I was searching for woofers for my minis. I do believe that was probably used by Polk in some of the early 7s. If the guy had 2 I would have bought them just to check them out.

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    Thats from another seller. Apparently he has a pair of 7s he's parting out. One came with a peerless and the other with above pictured audax.

    I think it would be cool to see a 7 with those CTS woofers and the Audax tweeters.
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  • DeRod
    DeRod Posts: 58
    I see what you’re saying about the serial number but are we sure how Polk kept track of the serial numbers from back then ?

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    That’s mine from early 1980. So a lower number than one from the 70s? Strange.
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  • Gardenstater
    Gardenstater Posts: 4,502
    They definitely started over with the 7A and the 7B, probably with the 7C and Series II as well.
    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
    · Share on FacebookShare on Twitter
  • DeRod
    DeRod Posts: 58
    Who was JM ? He signed most all my early drivers and crossover JM or JMH
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  • Gardenstater
    Gardenstater Posts: 4,502
    Qts of 0.29 compares to MW6500 0.2190. Vas is 35L vs 75L (2.6486 ft^3) for MW6500, so it was a stiffer suspension.

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    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
    · Share on FacebookShare on Twitter
  • Gardenstater
    Gardenstater Posts: 4,502
    edited December 12
    Apparently Polk wasn't the only one at the time pairing the Audax tweeter with a square magnet midwoofer, although it does look different compared to the one above.

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    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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  • DeRod
    DeRod Posts: 58
    Looks like those had 3 big felt pads around the tweeters and whole front covered in felt around the mid woofer
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  • DeRod
    DeRod Posts: 58
    They look sort of like the monitor 4s without the port
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