Which Monitor 7 version do I have?

TheMarco
TheMarco Posts: 17
in Vintage Speakers
They have the Peerless tweeters.

Are they 7a, b or just plain 7 like the serial sticker says?

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Comments

  • pitdogg2
    pitdogg2 Posts: 25,436
    edited August 2021
    Front picture would be helpful.
    Looks like the fuse holder has been replaced.
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  • TheMarco
    TheMarco Posts: 17
    5tqhepykgyvb.jpg
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  • pitdogg2
    pitdogg2 Posts: 25,436
    edited August 2021
    I'm going with 7A since it appears yours have the surround gaskets and no Velcro to hold the grill.
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  • TheMarco
    TheMarco Posts: 17
    Yup the grill is held with four pegs and the grill has holes.
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  • aprazer402
    aprazer402 Posts: 3,147
    Check this post and it's photos. Could be 7B's. I have two sets of 7B's with Peerless and one fuse.

    https://forum.polkaudio.com/discussion/comment/1442913#Comment_1442913
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  • pitdogg2
    pitdogg2 Posts: 25,436
    aprazer402 wrote: »
    Check this post and it's photos. Could be 7B's. I have two sets of 7B's with Peerless and one fuse.

    https://forum.polkaudio.com/discussion/comment/1442913#Comment_1442913

    I have to concur looking and reading the thread. I also noticed that those in that thread also had gold plated fuse holders. I've never seen those on Polk's from the factory. Interesting that both are monitor 7's. I wonder if only the sevens came with the gold plated fuse holder?
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  • Gardenstater
    Gardenstater Posts: 4,459
    Those are 7B's. My 7B's are 19723 and 19726 and have the same sticker on the XO that just says "7" and my drivers and front of speaker enclosure look the same as yours and my fuse holder is naked brass like yours. So we both have early 7B's. Mine were purchased in Sep 1979.
    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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  • pitdogg2
    pitdogg2 Posts: 25,436
    Brass ? WOW....very interesting.
    I would never of thought it was brass.
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  • Gardenstater
    Gardenstater Posts: 4,459
    Yeah it seems to me that back in the 70s naked un-plated brass was pretty common for electrical connections. At some point they started plating with nickel (I believe) so that tarnishing isn't a problem. Brass has a higher electrical conductivity than nickel though so if you polish/clean them you are better off.
    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