Why does my amplifier keep blowing fuses? Is it my power wire?
If your amplifier’s main power wire has a fuse in-line that keeps “blowing”, it can be related to the wire itself or the amplifier. You can tell if the problem is in the power wire by disconnecting the amplifier from the power wire, and insulating the amplifier end of the wiring from grounding against the body of the car (using electrical tape for this will work just fine). Then, simply put another fuse into the wire – if it blows, then somewhere along that run of power wire you have a cut in the insulation (or jacket) where the wire itself is touching the metal of the car. Pay particular attention to the point in the car where the power wire runs from the engine compartment into the car’s interior. If the hole that was drilled does not have a grommet and is unprotected, the sharp edges of the hole may have worn through the insulation of the wire, causing it to “ground out”. Additionally, try looking for any point in the wire that may be caught by moving panels, doors, or trunk components. Any bare wire that sticks through the insulation should be trimmed back, and that break in the insulation should be repaired with electrical tape or heat-shrink tubing. If the fuse does not blow when the amplifier is not hooked up, then the amplifier is most likely the cause. In most cases, an amplifier will blow fuses due to internal damage caused by the way it was installed. Many times, an amplifier won’t show signs of improper installation until it’s too late, and blowing fuses indicates that damage has been done. An amplifier that blows the main power fuse immediately after you turn it on or when the fuse is inserted into the fuse holder is usually damaged in its power supply or output section, and will require serviced. Improper Gain and/or Bass control settings, low impedances, or blown/failing speakers are the most common causes of this trouble.
Why does my amplifier keep breaking, blowing fuses, or blowing speakers?
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How do I set my EQ for optimum sound?
How do I determine what size amp I need for my speakers?
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