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    Whelen Air Horn - Popping Noises

    I have the unit grounded to the chassis behind the passenger kick panel, so I'm not sure if grounding would be the issue
  2. L

    Whelen Air Horn - Popping Noises

    Hi all, I recently acquired a Whelen PAP112 Air Horn & PA Amplifier that I've installed in my vehicle. Unfortunately, I've noticed a couple issues that I can't seem to figure out a cause for. Whenever the PAP112 unit turns on or off (via key ignition power), a loud 'pop' noise can be heard...

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