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Thread: Home Theater - Computer PSU's trip off when car amp kicks on.

  1. #1
    Join Date
    Jul 2001
    Boise ID

    Home Theater - Computer PSU's trip off when car amp kicks on.

    HI guys, been awhile since I poked my head in here!

    ANYwho, I have a 500watt and 300watt computer PSU's connected to a car amp. All 12V (Yellow) lines (-minus the ones in the mobo connector), and all grounds are connected (minus mobo connector ones).

    Both PSU's are hardwired to power on when plugged in. With everything except the remote wire connected they power up fine. The moment the 12V + is connected to turn on the amp, both PSU's shut down. They start up after a power disconnect and maybe 10 seconds.

    The amp is an old MTX 2150. I don't think it's very powerful really. It's driving two serially connected RF Punch HE2's.

    Thanks all.

    EDIT - I now have a MR16 bulb running off the 5V line. Behavior is still the same - touch the 12V jumper to the amp and everything shuts down.
    Last edited by rave5096; 06-02-2011 at 03:34 AM.
    "We'll do this the old navy way, the first one to die, looses."

    Looking For A Second Gen 4Runner, CarPuter To Follow! :-)

  2. #2
    MySQL Error soundman98's Avatar
    Join Date
    Jan 2008
    on the border of northern IL/IN
    because the psu's cannot supply enough power.

    i could pop the internal fuse on a 350w psu using a standard radio at half volume.

    if you are going to be running this way for very long times, i recommend a dedicated high draw power supply such as this-- but one that meets your needs:

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