Model 7 With Piezo Tweeter?

skrol
skrol Posts: 3,375
in Vintage Speakers
I know some of the Model 9 had the Piezoelectric tweeter but I never heard of the Model 7 having it too.

tgw2pt2tw0np.jpg
Stan

Main 2ch:
Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

HT:
Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

Other stuff:
Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
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Comments

  • mhardy6647
    mhardy6647 Posts: 33,793
    edited December 2019
    derp -- that's odd.
    Not sure any Sevens ever escaped from the laboratory out into the field so equipped... wouldn't it be cool to stumble across one, though?
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  • F1nut
    F1nut Posts: 50,542
    That's a new one on me.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • mhardy6647
    mhardy6647 Posts: 33,793
    edited December 2019
    I am deeply fascinated by this!
    Marky's OCD (or, more accurately, Marky's audio obsessiveness)...
    triggered. B)

    @skrol do you know the provenance of that ad scan?

    OK, so... I am data mining ;) @ https://www.americanradiohistory.com/


    So far :p I've got this -- earliest mention I've found, in the form of an ad, showing the Model Seven -- with no details as to its mechanism of operation, so to speak. :#

    ppuueem5pudt.png
    source: https://www.americanradiohistory.com/Archive-Audio/70s/Audio-1975-08.pdf page 90 of the issue
    (note that this is after the move to Wetheredsville Road)

    Further details as events warrant. B)
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  • tonyp063
    tonyp063 Posts: 1,083
    Further details as events warrant.

    Anon?
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  • mhardy6647
    mhardy6647 Posts: 33,793
    edited December 2019
    tonyp063 wrote: »
    Further details as events warrant.

    Anon?

    Well... anon might be a tad optimistic.

    B)

    Let's say in the fullness of time, with the term time perhaps reflecting the perspective of a geologist.
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  • verb
    verb Posts: 10,176
    Mark if anyone can find the Model 7 Piezo, it would be you!

    But I did learn 2 more things today. Polk made a model 9, and it has a Piezo tweeter! :smile:

    kl2bzjgmst5n.png
    Basement: Polk SDA SRS 1.2tl's, Cary SLP-05 Pre with ultimate upgrade,McIntosh MCD301 CD/SACD player, Northstar Designs Excelsio DAC, Cambridge 851N streamer, McIntosh MC300 Amp, Silnote Morpheus Ref2, Series2 Digital Cables, Silnote Morpheus Ref2 Series2 XLR's, Furman 15PFi Power Conditioner, Pangea Power Cables, MIT Shotgun S3 IC's, MIT Shotgun S1 Bi-Wire speaker cables
    Office: PC, EAR Acute CD Player, EAR 834L Pre, Northstar Designs Intenso DAC, Antique Sound Labs AV8 Monoblocks, Denon UDR-F10 Cassette, Acoustic Technologies Classic FR Speakers, SVS SB12 Plus sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable, Groneberg Quatro Reference IC's
    Spare Room: Dayens Ampino Integrated Amp, Tjoeb 99 tube CD player (modified Marantz CD-38), Analysis Plus Oval 9's, Zu Jumpers, AudioEngine B1 Streamer, Klipsch RB-61 v2, SVS PB1000 sub, Blue Jeans RCA IC's, Shunyata Hydra 8 Power Conditioner
    Living Room: Peachtree Nova Integrated, Cambridge CXN v2 Streamer, Rotel RCD-1072 CD player, Furman 15PFi Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi sub
    Garage #1: Cambridge Audio 640A Integrated Amp, Project Box-E BT Streamer, Polk Tsi200 Bookies, Douglas Speaker Cables, Shunyata Power Conditioner
    Garage #2: Cambridge Audio EVO150 Integrated Amplifier, Polk L200's, Analysis Plus Silver Oval 2 Speaker Cables, IC's TBD.
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  • ken brydson
    ken brydson Posts: 8,759
    Off topic but can anyone name a Polk with a horn tweeter?
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  • verb
    verb Posts: 10,176
    ken brydson wrote: »
    Off topic but can anyone name a Polk with a horn tweeter?

    @mhardy is already going crazy over the Model 7's with a Piezo! :smile:
    Basement: Polk SDA SRS 1.2tl's, Cary SLP-05 Pre with ultimate upgrade,McIntosh MCD301 CD/SACD player, Northstar Designs Excelsio DAC, Cambridge 851N streamer, McIntosh MC300 Amp, Silnote Morpheus Ref2, Series2 Digital Cables, Silnote Morpheus Ref2 Series2 XLR's, Furman 15PFi Power Conditioner, Pangea Power Cables, MIT Shotgun S3 IC's, MIT Shotgun S1 Bi-Wire speaker cables
    Office: PC, EAR Acute CD Player, EAR 834L Pre, Northstar Designs Intenso DAC, Antique Sound Labs AV8 Monoblocks, Denon UDR-F10 Cassette, Acoustic Technologies Classic FR Speakers, SVS SB12 Plus sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable, Groneberg Quatro Reference IC's
    Spare Room: Dayens Ampino Integrated Amp, Tjoeb 99 tube CD player (modified Marantz CD-38), Analysis Plus Oval 9's, Zu Jumpers, AudioEngine B1 Streamer, Klipsch RB-61 v2, SVS PB1000 sub, Blue Jeans RCA IC's, Shunyata Hydra 8 Power Conditioner
    Living Room: Peachtree Nova Integrated, Cambridge CXN v2 Streamer, Rotel RCD-1072 CD player, Furman 15PFi Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi sub
    Garage #1: Cambridge Audio 640A Integrated Amp, Project Box-E BT Streamer, Polk Tsi200 Bookies, Douglas Speaker Cables, Shunyata Power Conditioner
    Garage #2: Cambridge Audio EVO150 Integrated Amplifier, Polk L200's, Analysis Plus Silver Oval 2 Speaker Cables, IC's TBD.
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  • mhardy6647
    mhardy6647 Posts: 33,793
    ken brydson wrote: »
    Off topic but can anyone name a Polk with a horn tweeter?

    I've seen some pretty horrible Frankenpolks on eBAY :(

    @Verb -- really? You didn't know about the Model Nine?
    My very first post at the Polk Forums was asking about them -- looking for confirmation of an old, old story about Polk's genesis, umm, I mean... origin story. :)
    https://forum.polkaudio.com/discussion/comment/195946

    Pair of Model 9As in the basement B)


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  • mhardy6647
    mhardy6647 Posts: 33,793
    nrj8diuas4gx.png

    source: https://www.americanradiohistory.com/Archive-Audio/70s/Audio-1974-05.pdf (page 81)

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  • verb
    verb Posts: 10,176
    Too funny! I did catch the excerpt from you when searching around, and the cease and desist order from Bose! The Bozo? Hilarious! :smile:
    Basement: Polk SDA SRS 1.2tl's, Cary SLP-05 Pre with ultimate upgrade,McIntosh MCD301 CD/SACD player, Northstar Designs Excelsio DAC, Cambridge 851N streamer, McIntosh MC300 Amp, Silnote Morpheus Ref2, Series2 Digital Cables, Silnote Morpheus Ref2 Series2 XLR's, Furman 15PFi Power Conditioner, Pangea Power Cables, MIT Shotgun S3 IC's, MIT Shotgun S1 Bi-Wire speaker cables
    Office: PC, EAR Acute CD Player, EAR 834L Pre, Northstar Designs Intenso DAC, Antique Sound Labs AV8 Monoblocks, Denon UDR-F10 Cassette, Acoustic Technologies Classic FR Speakers, SVS SB12 Plus sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable, Groneberg Quatro Reference IC's
    Spare Room: Dayens Ampino Integrated Amp, Tjoeb 99 tube CD player (modified Marantz CD-38), Analysis Plus Oval 9's, Zu Jumpers, AudioEngine B1 Streamer, Klipsch RB-61 v2, SVS PB1000 sub, Blue Jeans RCA IC's, Shunyata Hydra 8 Power Conditioner
    Living Room: Peachtree Nova Integrated, Cambridge CXN v2 Streamer, Rotel RCD-1072 CD player, Furman 15PFi Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi sub
    Garage #1: Cambridge Audio 640A Integrated Amp, Project Box-E BT Streamer, Polk Tsi200 Bookies, Douglas Speaker Cables, Shunyata Power Conditioner
    Garage #2: Cambridge Audio EVO150 Integrated Amplifier, Polk L200's, Analysis Plus Silver Oval 2 Speaker Cables, IC's TBD.
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