Question about Pyle - PLMRA420 Marine 1000 Watt 4 Channel MOSFET Amplifier Car Audio Amplifier

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Amplifier trip while cruising

I have installed a Pyle PLMR420 marine amplifierin my boat. The amplifier works OK for 20 minutes and trip activating the protection mode. It seem to happen while cruising and not at dock. DO you know if the pounding could be an issue, voltage ro adjustment?

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  • edgardq Jun 02, 2009

    HI Audio20

    The system is hooked up from a Clarion CMD5 via RCA connections into amplifier. It work fine in the dock and I have attempt not to crank up and leave it low, still trip. The power cabling is gauge 8 and speakers 12.

    I will try to segregate eahc speaker one by one by disconnecting from amplifier to see if it shorts.

    Do you fill it could be also related to amp drawn, not holding by the battery?

    Any other feedback will be appreciated as the manufacturer response is ZERO, POOR SUPPORT

  • audio20
    audio20 May 11, 2010

    Just a couple things to consider while troubleshooting

    If everything works fine when sitting at the dock. Then you probably have some type of connections problem. It could be internal to the amp but it can also be a Speaker shorting due to the vibrations of the boat.
    Ensure all of your wiring is correct using the right gauge power wire etc..
    All connections clean secure and tight.
    Are you cranking it way up when cruising the input level may be to high for the amp?
    How is the radio connecting to the amp via RCA or High Level Input assuming you are using a radio and not a portable device like and MP3 Player?



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Is it hot when it shuts off? from what you just described sounds like amp could have the "ohms" too low on a channel. Check you speakers with a meter. They should be no lower than 4 ohms.

Posted on Jun 03, 2009


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