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Polytone 101 Speaker Impedances

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  • Polytone 101 Speaker Impedances

    Got a Polytone 101 Bass combo

    here. It has a 15" speaker and two 8" speakers all wired in parallel.

    All 3 speakers are dead and open circuit. No impedance markings on any of them.

    Anyone know what impedance they ought to be?

  • #2
    Polytone power amps are typically designed for a 4 ohm load. My guess would be 8 ohm - 15 inch and 2 x 16 ohm - 8 inch.

    Comment


    • #3
      Bill - that was my guess too. Just wanted to see if anyone else guessed the same.

      Comment


      • #4
        You could always check the ratio of the OT. This would allow you to figure the primary Z at different speaker loads. The right load should become obvious as it relates to the circuit then. It's probably 4 ohms as noted but it's easy enough to check and be sure.
        "Take two placebos, works twice as well." Enzo

        "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

        "If you're not interested in opinions and the experience of others, why even start a thread?
        You can't just expect consent." Helmholtz

        Comment


        • #5
          Sadly it's a transistor amp

          Comment


          • #6
            OOOoohh... Gotcha. I've been here at the forum almost since it's inception. I forget that there's so many transistor threads here now since it really was a tube amp only sort of place for a very long time. With so many modern tube amps using transistors it was bound to happen of course. I'm just a dinosaur.
            "Take two placebos, works twice as well." Enzo

            "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

            "If you're not interested in opinions and the experience of others, why even start a thread?
            You can't just expect consent." Helmholtz

            Comment


            • #7
              I know exactly how you feel Chuck. I occasionally get people (young people) bringing me amps and saying "it's really old..." and it turns out to be a 20 year old transistor Fender.

              Still can't quite get my head around anything with transistors in it being "vintage" or "classic"....

              Comment

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