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Speakers and Amplifiers

Discussion in 'Datasheets, Manuals and Component Identification' started by Swiz1611, May 24, 2010.

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  1. Swiz1611


    May 23, 2010
    Maybe somebody here can help me out with this so whatever tips or advice you can give me will help a lot so here it goes.

    I acquired two small amplified speakers from an old computer. I can't find who makes these speakers at all. The name on them is (EP-280/Amplified Speaker System). No serial number, model or anything.

    The speakers had a bad hum so I decided to take it apart and fix the hum but became intrigued and wanted to know how to build the small amplifier attached to the circuit board. I can read and figure out schematics and componets which I have already. The problem I have now is I don't know the size amplifier schematic to build to test with the small speakers. There is no impedance or wattage printed any where on the speakers. I want to build the entire amp circuit board from scratch and hook them up to the speakers. I tried figureing out the circuit board that was already in it but lost track of the componets hook ups, became ****ed and soldered everything off of it.

    Does anybody have any ideas or advice on how I can start this out? I want to build the amp but I don't know the size amp to build because I can't figure out the wattage of my small speakers or the ohm load. They are real small speakers so this is not a lot of power here. The speaker size is approx. 3 in. I also took the transformer out (assuming a step down transformer) and don't know how to measure the voltage coming out of the transformer. any tips on that also?

    Any help or suggestions would be great Thanks

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