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Question about Kenwood Excelon KAC-X541 88W x 4 Car Amplifier Car Audio Amplifier

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Amplifier stays in protect mode

Hello Ive got a little problem with my amplifier It was working fien but I think the plus cable touched the ground one and now the amplifier does not turn on unless I take the ground cable out of the amplifier the red protect light turns on...it should go green.Could you tell me if the amplifier is dead or if there is a solution.Thank you.

Posted by Liam Bailey on

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Anonymous

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Hi I see your post was never answered and I doubt you still have this amp.. Many amplifiers are tossed in the trash due to this one little mistake! But for future use and I hope it helps: Install inline fuses on both polarities negative and positive, it is very important not to exceed twelve inches from your battery Reason: after this length resistance starts. to develop thus causing your amp to work harder and cause it to overheat and shut down and yes the red light will be on letting you know... Hey I'm a little warm after I cool off ill turn on again but I probably wont sound the same.... Thermal shutdowns,reverse polarity,low voltage,remote wire installed after ground wire all these mistakes cause the switching transistor to short out n throwing the amp in protect mode!! your local CB shop should be able to help you out next time I've been around amps since 16 yrs of age now I'm 37 and still trying to loose my hearing!! haha lol... hope this helps but remember always hook your positive cables remote, bat, mount amplifier, - batt , last the RCA cables...

Posted on Jun 02, 2012

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If the positive power cable touched the ground, the fuse inline should have blown. Did it?

Posted on Jan 15, 2009

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Protection circuit.
Checek the wiring of the amp and speakers, don' forget to look for shorts at the speakers. Make sure no wires are touching each other
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The red light indicates that your amplifier is in protect mode. Amps go into this mode if there is something wrong with the setup of the system to prevent fatal damage to the amplifier circuitry. This is bad thing since the amplifier will not function until the problem is solve and it can remove itself from protection mode.

Amplifiers can go into protect mode for many reasons but one of the most common is incorrect mounting. Is your amp sitting on the metal of your vehicle? Is it bolted down and screwed into the metal of the vehicle or your seat? The amp should never be touching any sort of metal. Only the ground should touching the metal of your vehicle.

Speaking of grounds, many people often neglect proper grounding which can cause an amp to go into protect mode. Do you have a solid ground? Is the wire less than 3 feet long and directly connected to a non-painted metal part of your vehicle? Is the ground wire the same gauge as your power wire?

These are just a few reasons why an amp can go into protect mode. You can find more information here. Or simply google for why your amp is in protect mode.
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The amplifier is in protection mode.
3 reasons for this...

  1. Improper Load/overheat - wrong impedence voicecoils or wired improperly below rated impedence.
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if the amplifier will still not go out of protect mode after removing the speakers and jumpering the remote wire to the + terminal - your amplifier needs professional repair.

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There are 4 reasons an amplifier tries to protect itself.

Overheating - thermal shutdown.

Over Impedence - The subwoofers installed are not configured into a load the amplifier can handle.

Output is grounded - a positive wire strand may be touching the ground terminal - a wire may be shorted, or a speaker voicecoil is blown.

Intennal problem - Output on amplifier blown, or some other component has failed.

Check your wiring to the amplifier again - if all is good - disconnect the speakers and try to power on. If the amplifier turns on normally - test the speakers for blown coils.

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If the speaker wires touched and the protection circuit didn't engage quickly enough, the output transistors may have failed. This is the most common cause for an amplifier to go into protect mode.

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