5A or 5B

Barcus1963
Barcus1963 Posts: 25
edited February 2012 in Vintage Speakers
Ok looking at some of the post here on this board I noticed that the Monitor 5 series speakers are completely different in design.
Does anybody remember why Polk overlapped the midwoffer to the PR?:question:
DSCN0989.jpg
Post edited by Barcus1963 on
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  • HTguru1982
    HTguru1982 Posts: 1,066
    edited February 2012
    Early 5B's, I believe. The 5A's had the Peerless tweeter. The later versions of the 5B's used the SL2000.
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  • Barcus1963
    Barcus1963 Posts: 25
    edited February 2012
    So how would I make sure that the tweeter was not replaced with an Sl1000?
    Would I be able to ck the crossover?
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  • Barcus1963
    Barcus1963 Posts: 25
    edited February 2012
    Back of speaker
    DSCN0991.jpg
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  • skrol
    skrol Posts: 3,381
    edited February 2012
    That is interesting. I thought that only the 5A had the overlap PR and MW and the badge mounted to the bottom of the cabinet and either the SL-1000 or Peerless. Any idea what the mfg date was?
    Stan
    Stan

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    HT:
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  • Barcus1963
    Barcus1963 Posts: 25
    edited February 2012
    skrol wrote: »
    That is interesting. I thought that only the 5A had the overlap PR and MW and the badge mounted to the bottom of the cabinet and either the SL-1000 or Peerless. Any idea what the mfg date was?
    Stan

    There are no other badges on these speakers.
    No stickers othere than whats on the terminal caps
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  • TennMan
    TennMan Posts: 1,266
    edited February 2012
    Barcus1963 wrote: »
    So how would I make sure that the tweeter was not replaced with an Sl1000?
    Would I be able to ck the crossover?
    It looks like a sl1000 to me. The peerless has a black dome and face plate. The sl1000 is silver with a clear dome like the one you have. If you want to verify, remove the four screws holding the tweeter in, remove it and read the sticker on the back.
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  • heiney9
    heiney9 Posts: 25,178
    edited February 2012
    See the sticker that says "5B"? Guess what, it's a 5B. Lots of variations of 5B's. My pair of 5B's had the sl2000 tweeter with a single fuse (now completely bypassed) but my cabinets are the newer cabs with the beveled edges. If I had to guess yours are a bit of a transitional model since they have the older cabinets and overlapping mid and passive you typically see for the 5A's. If you care to pull the midwoofer I'd be interested to know the model number MW6500, 6501 or 6502.

    The tweeter is an SL1000.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • Barcus1963
    Barcus1963 Posts: 25
    edited February 2012
    heiney9 wrote: »
    If you care to pull the midwoofer I'd be interested to know the model number MW6500, 6501 or 6502.

    The tweeter is an SL1000.

    H9

    It has a 6500 MW:mrgreen:
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  • Barcus1963
    Barcus1963 Posts: 25
    edited February 2012
    Now getting back to the OP, what was the reason for Polk to overlap the MW to the PR?
    Anybody know?
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  • heiney9
    heiney9 Posts: 25,178
    edited February 2012
    If the MW6500 is genuine and not a replacement, everything on the surface points to it being a 5A, but Polk had so many transitional pieces that it is likely they ran out of 5A x-overs and used 5B x-overs to finish the run, so to speak. I wouldn't worry too much as the biggest differences in sound were the tweeters.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • Barcus1963
    Barcus1963 Posts: 25
    edited February 2012
    heiney9 wrote: »
    If the MW6500 is genuine and not a replacement, everything on the surface points to it being a 5A, but Polk had so many transitional pieces that it is likely they ran out of 5A x-overs and used 5B x-overs to finish the run, so to speak. I wouldn't worry too much as the biggest differences in sound were the tweeters.

    H9
    I love the way these sound!
    These Kick Butt
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