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Constant-voltage speaker systems refer to networks of loudspeakers which are connected to an audio amplifier using step-up and step-down transformers to simplify impedance calculations and to minimize power loss over the speaker cables. They are more appropriately called high-voltage audio distribution systems. The voltage is constant only in the sense that at full power, the voltage in the system does not depend on the number of speakers driven (as long the amplifier's maximum power is not ex Co...
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A unusual inquiry I am sure. I am attempting to restore an old drive-in movie speaker. The original inside parts were totally rusted and beyond identification or function. Found a 4" waterproof marine speaker (100 watt) that fits well. I am unable to find a potentiometer with a shaft length that will accommodate a knob when properly mounted inside the casing. It needs to be about 1 inch or 2 cm. I have no idea what ohm rating should be required. My intention is to tie into a vintage Sharp 10 W s…
Got great help from Digi-Key sourcing a proper potentiometer with necessary shaft size for drive-in movie speaker I am restoring. Original internal parts were rusted almost beyond recognition. Able to find 4" waterproof speaker for boats that works well. I now have a new problem. Original speaker wire cable has four very small wires that are blue, orange, black, and green plus a ground wire. I have no clue what I am dealing with and how to wire it up. Thinking I should just opt for standard two…
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