Can you identify these speakers?

Hello,
In a garage sale I bought this pair of speakers.
The labels have disappeared, little/no info on the back of the speakers.
Works, suspension to be changed on 1 see 2 Medium.
The speaker is very heavy + 15Kg per speaker
I tried a search via google but without result, offers me Cabasse but they are not.
the terminals on the back are very thin compared to the size of the speaker and the woofer.
I tried a search via different Facebook pages but no results either, I am told that some original HP could be replaced.
Can anyone here tell me the make and model number?
If not, is it possible with a device (if so which one) to have the characteristics of HP?

Thank you for your help.
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Comments

  • xschop
    xschop Posts: 5,000
    Looks like something Radio Shack aborted.
    Don't take experimental gene therapies from known eugenicists.
  • Gardenstater
    Gardenstater Posts: 4,457
    I give up. What's "HP"?
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
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  • SeleniumFalcon
    SeleniumFalcon Posts: 3,760
    edited June 2023
    Hello,
    Welcome to the Polk Audio forum. Let's see what can be determined:

    1). it is a sealed enclosure, no ports or vents.
    2). it appears to be a three way design.
    3). it looks to have a piezoelectric tweeter (the terminal with the blue dot is probably the positive one).
    4). it has a very simple crossover, two components: a capacitor (seems to be a non-polarized type) and an inductor. I'd venture the white wires are making the negative connections.
    5). there appears to be some effort to time align the components, the mid range driver is recessed behind the woofer and tweeter.
    6). the position of the components is the same for both channels, no mirror image component placement.
    7). the binding posts are basic push button type.
    8). one of the mid range drivers seems to be damaged and probably doesn't sound very good.
    9). the woofer uses a paper cone material with a ribbed surface and uses a foam surround.
    10). the cabinet seems to be made of particle board.
    11). it appears to use fiberglass as an internal damping material.

    I would venture to say they came as part of a total rack type system, maybe Kenwood or Pioneer or maybe Sansui or Fisher? I say this because the binding post cup is placed fairly high on the cabinet which makes for easier connections when everything is placed in a rack type cabinet. This would account for the lack of brand badge or logo since everything came as a package.
  • pitdogg2
    pitdogg2 Posts: 25,412
    I agree with @SeleniumFalcon. Very cheap components, cheap build, not worth the time or effort to restore if that is your concern.
  • Emlyn
    Emlyn Posts: 4,476
    They probably sounded decent by mid-1970s department store stereo system standards which is likely their source. The best way to get clues is by any markings on the drivers. The well known brands tended to ink their labels on the drivers or crossover as a source of pride. With these it appears a company may have just sourced generic drivers they could get their hands on and screwed them into an irregular shaped box.
  • F1nut
    F1nut Posts: 50,494
    Try asking at AudioKarma. They are better at identifying odd ball speakers like those.
    Political Correctness'.........defined

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  • mhardy6647
    mhardy6647 Posts: 33,765
    edited June 2023
    ^^^ Good advice! :)

    Odd they are indeed. That midrange (or perhaps mid/tweeter) driver looks interesting. Reminds me of the small MR drivers used by IMF in some of their smaller speakers (which were quite good).

    The cabinetry looks -- well -- kind of atrocious. :/

    The less said about the Motorola piezo, the better ;)

    Actually, the Motorola (later CTS) piezos are not horrible a priori, if used correctly -- the problem is almost no commercial products used them correctly. Since a piezo is essentially a capacitor, it doesn't theoretically "need" an electrical crossover; it is its own crossover. The problem is that when allowed to operate to its "built-in" rolloff frequency, it gets nasty sounding. Using a properly designed crossover can make them acceptable -- it will be recalled that the (still) rather highly thought of Dahlquist DQ-10 used the Motorola piezo, too. :)

    I will take this opportunity to mention :# that Polk's first commercial consumer speaker (the Model Nine) also used that Motorola tweeter -- albeit not to good effect. ;)



  • VR3
    VR3 Posts: 28,610
    Some days I can identify with those speakers.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
  • jdjohn
    jdjohn Posts: 3,144
    Looks like one of them was dropped on its head...or the corner of its head.
    "This may not matter to you, but it does to me for various reasons, many of them illogical or irrational, but the vinyl hobby is not really logical or rational..." - member on Vinyl Engine
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  • Schurkey
    Schurkey Posts: 2,100
    I was going to say "Homebuilt", perhaps as a high-school "Shop" project. The cabinet reminds me of the D-I-Y shelving sold in Home-Improvement stores--vinyl veneer over chipboard Nobody installs enough bracing, so the shelves sag between supports.