Question about Kenwood KAC-X401M Car Audio Amplifier

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Cooling fan light on My KAC-X401M

My amp stoped working and the cooling fan and the operation/protection lights are on. there is still power to the amp. what should i do!

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Disconnect all power including ground for 20min

Posted on Aug 09, 2007

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Stuck in protection mode tried everything voltage good wires good ground good open/close button dosen,t help me at all love amp please help


everything you've tryed is useless(with respect) because amp has shorted output transistors one or more and amp is in protection mode to protect your amp from further damage.take it to repair shop or try to locate blown transistor yourself.good luck

Dec 10, 2010 | Kenwood KAC-X401M Car Audio Amplifier

1 Answer

Solve Your ''kenwood kac x40m problems'' Problem Now! the operation protection light is on never goes off subs dont work what do i do


your amp output transistors are shorted and protection is activated to protect your amp from bigger damage.if you are confident you can try to open the amp and you should see some burn marks or burnt(blown) transistor and just simply replace him.or take it to repair shop

Mar 21, 2010 | Kenwood KAC-X401M Car Audio Amplifier

2 Answers

Cooling fan not working


check the solder joints from the fan to the board and if they are fine u will need to get a new fan

Apr 17, 2009 | Bob Mackie MACKIE M1400/M1400i Car Audio...

1 Answer

What does it mean when the power light blinks on the amp?


sounds like u r overheating and then cooling try a 12volt fan

Apr 02, 2009 | Car Audio & Video

1 Answer

Kenwood amp kac-x401m


How long will the bass play before the amp kicks into protection mode and how loud are you listening to it? I've noticed with my amps that if they don't have enough air flow they will get hot and kick into protection mode. They will also kick into protection mode if you are running it at more than it can handle. Check your adjustments on both your amp and the head unit. Make sure you are not running more bass than the amp can handle.

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1 Answer

Kenwood Excelon KAC-X521


According to page 7 of the radio's manual, E-02 means the amp has failed and DC is being applied to the speakers. It also says "Turn the POWER switch "OFF" and release the protection."

Feb 09, 2008 | Kenwood Excelon KAC-X521 Car Audio...

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