Question about JVC KS-AX704 Car Audio Amplifier

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Power Protectin stays on

When you put power to amp protection light comes on and it makes a clicking noise.

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Sounds like u have fried your amp. U didn't mention if u had speakers hooked 2 the amp. If u do, disconnect them and c if the problem persists. If it doesn't, u may have crossed speaker wires or fried speakers. I f it doesn't ur amp is more than likely fried. Sounds like that clicking noise could be the output circuit protection switching on and then off when it detects a short or problem.

Posted on Jul 18, 2008

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Sounds like you have blown your amplifier. There could be severqal causes for this happening. Take it to an electronics repair shop, but honestly you might just be better off replacing it altogether.

Posted on Jul 17, 2008

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1 Answer

I have a bamf 5500 series and the amp is on and working but when i turn up the volume the amp will go into protect mode and stay there untill i turn the volume back down then the amp comes out of protect...


you probably have a blown sub(s) that short out when the volume is turned up. it would be a good idea to find out which one(s) is bad and replace it. sooner or later it may make the amp go bad if not replaced or removed.

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Hi the protection light comes on when there is a problem within the amps. circuitry. Generally speaking the protection light normally comes on when powered up while the amp checks all of its voltage rails so that they all lie within a specific tolerance, when all have been verified to be in spec. then the protect light goes out & the power light comes on. If the protect light stays on then a fault exists within it's circuitry. Cheers, acbva.

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Outputs are fried. Try disconnecting your speakers and see if it still goes into protection mode. If it does then you A thumbs up would be greatly appreciated if answer is helpful for your question. THANK you and GOD BLESS

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1 Answer

Protection light keep coming on


Make sure your head unit is off.

Reset the amplifier using the manufacturers specified method. Usually this is just power down briefly and then back up. I usually pull the amp fuse and make sure all LED's on the amp go out. Wait 10 seconds, and then put the fuse back in.

If the LED comes back on when you reconnect power, without the HU being on, you've got a bad amp.

If the LED does not come back on after reset, then check for short circuits on the speaker leads. Still leaving everything off, from the amp terminals, remove both wires to a specific speaker and check for shorts.

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1 Answer

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yes make sure there both connected properly, check the fuses, the protection light usualy comes on when there is too much power and the amp protects itself from blowing

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1 Answer

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Protection usually means that there is a short some where. If it is inside the amp or external I couldn't tell you. You could check the fuse to make sure that isn't blown. I had a Memphis amp that blew both fuses and the protection light came on. I swapped out the fuses and worked fine, still works. If you have a multimeter set it to OHMs and check the resistance between the power terminals. It should be very high. If these things don't work then there is most likely something wrong with the amp or your power termination. I wasn't able to find a lot of information on this amp but if it has screw type terminals, did you use terminals. If you just put the wires in the terminals make sure there wasn't loose strands touching. I hope you can get this one.
-Andrew Hawkins

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1 Answer

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No, this amp is not a heavy power consumer- matter of fact it takes very little power to run.Maybe you should check the fuses on the amp to see if they are what is recommended.Also check your fuse kit to your amp- your fuse might not be big enough.If neither works take it back where u got it.

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it's blown....probably, check your connections and make sure your presenting it an ohm load it can handle....so check the sub with a dmm.

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