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    #1

    testing amplifier

    I'm trying to fix my sound system and am struggling with diagnosing the amp.

    I've followed all the wiring and am able to get sound if I disconnect the amp and jump the speaker input and output wires at the amp connector (essentially bypassing the amp) I also validated that the amp is getting 12v.

    I assumed that the amp is faulty so I bought another used one from eBay but I'm still not getting any sound.

    So either both amps (my old one and the one I got from eBay) are faulty or there's something else I'm missing.

    is there any way to test the amp?
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    #2
    What is the year and model of your car? Which headunit are you using?
    "I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj

    85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
    88 M3 - LACHSSILBER/SCHWARZE
    89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
    91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER

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      #3
      it's an 86 325es and I'm using the stock head unit.

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        #4
        Which headunit though? It should be an anti-theft unit. I'm curious if the headunit was swapped.
        "I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj

        85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
        88 M3 - LACHSSILBER/SCHWARZE
        89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
        91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER

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          #5
          it's the CM5905 Anti Theft Unit. I know it's been swapped but it produces sound.

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