by surf_life on January 2nd, 2008

surf_life

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My amplifier is overheating, its a rockford fosgate 551x its powering 4 speakers rated at 60 rms i have 9 gage power cable and 5 gage ground, its on the floor in the back seat. I am wondering why it would be overheating, could it be the gage of wire?

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  • by Old School on January 3rd, 2008

    Old School

    How do you know that amplifier is overheating?

    Based on the stats for the amp (75W x 4 @ 4 Ohms, 140 W x 4 @ 2 Ohms), the maximum current your amp will draw is about 30 amps.

    10 gauge wire is rated to deliver up to 100 amps @ 12V, so 9 gauge wire is plenty. 5 gauge wire is more than plenty.

    In any event, if the amp is overheating, it's because you are either demanding too much current (i.e. cranking it too loud) or it's not getting enough cooling air circulation.

    Did you install it UNDER the carpet in the back seat floor? That would probably do it. Generally, you need 1"-2" of airspace around the amp to allow cooling air to circulate.

    Good luck.

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You're reading My amplifier is overheating, its a rockford fosgate 551x its powering 4 speakers rated at 60 rms i have 9 gage power cable and 5 gage ground, its on the floor in the back seat. I am wondering why it would be overheating, could it be the gage of wire?

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