Question about Rockford Fosgate RF2002 Car Audio Amplifier

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BLOWS FUSES KEEPS BLOWING FUSES WITH OR WITHOUT SPEAKERS CONNECTEDI HAVE TRIED IN 2 DIFFERENT CARS DONT BELIEVE ITS THE WIRING

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If it blows fuses only after the remote voltage is applied, the amplifier likely has shorted output transistors.


Let me know if you have any other questions.

Posted on Aug 30, 2008

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My kenwood ka-87 stereo integrated amplifier keeps blowing fuses any idea why?


First I would disconnect the speakers and then power up and see if it blows if not add a speaker at a time and make sure the speaker is not grounding on metal

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It keeps blowing fuses when i put one in


Check that you wiring is correct. Positive to positive and negative to negative.

If it still blows fuses then Power supply or output rails are dead short.

Take it in to a reputable dealer and have it repaired.

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Kenwood KAC-729S keeps blowing fuses. Checked all cables, re-ran power, remote, and ground. All good, still blows them at power-up.


Hello opey_69a,

Here are the troubleshooting steps for fuses blowing.
1) Remove all wiring except ground, power and remote and see if the amp powers up without blowing the fuses. If it does, the problem is in the input cables or speaker wiring.
2) The use of loudspeaker impedances below the recommended minimums will cause the amp to draw excessive current - check.
3) A shorted or grounded RCA cable may cause the fuses to blow - check.
4) If an amplifier fuse blows continually, with only +12 volt, ground and remote leads connected, the amplifier is probably defective, most likely shorted output MOSFET's. In this case the amp needs professional repair or replacement.

Hope this helps.

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1 Answer

Amp keeps blowing fuses (alpine mrdm1001


Hello prabh_dusanj,

First make sure that the amp is not operating into too low of an impedance. If the load is OK, it's most likely a short in the output transistors.

Hope this helps.

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1 Answer

I have a dual XIA3145 580 watt amp that keeps blowing fuses


Generally, this indicates that there's at least one shorted output transistor.

Disconnect all speaker wires from the 'amplifier's speaker terminals' and disconnect RCA/signal cables from the amp. If it powers up normally, the speakers/wiring need to be checked. If it still blows the fuses, the amp almost certainly has shorted output transistors and will need to be repaired.

I'd recommend using two 10 amp fuses. The amp will power up with 10 amp fuses if there is no problem. If there is a problem, there's less of a chance of doing more damage by using the 10 amp fuses.

Let me know if you have any other questions.

babin_perry@yahoo.com

Sep 04, 2009 | Dual Electronics illumiNITE XIA3145 Car...

1 Answer

Amp blowing fuses


Your amp is blowing fuses to protect your circuit. The type of 12V battery does not matter. For whatever reason you are over driving the amp. 2 Ohms sounds like a very low impedance for a car amplifier output. I am assuming you have the two 12" speakers wired in parallel. Most are rated at 4 Ohms which means you are pulling twice the current with the 2 Ohm load. Also, the bigger the speaker, the bigger the magnet, the bigger the coil, the larger the inductance, the heavier the load. Make sure these speakers are matched with your amp. A small amp driving large speakers will shut down at high volumes. Try putting them in different channels. Good Luck.

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1 Answer

40amp fuse blows


Measure the DC voltage across the B+ and ground terminals as well as across remote and ground. If you have less than 11 volts when the amp tries to power up, the amp could be shutting down due to low voltage.

If the voltage remains near or above 12v, disconnect all speaker wires and signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down or blows the fuse when you apply remote voltage (turn the head unit on), the amp likely has blown output transistors.

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2 Answers

Blowing fues


Are you sure you can put a 2 ohm load on this amp? Thats almost a complete short.

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1 Answer

Amp blows fuses "immediately"... HELP


for this to cause a problem with amplifiers there is something internally wrong with it. Most of the time the mosfets take a shit from the hot...cold....hot....cold atmosphere its put in by all of us audio people. If it still has warrenty that would be the easiest route to go. Send it in to them and have them fix it for FREE lol!! well sorta. Hope this helps you understand why you are blowing fuses.

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