Question about Kicker ZX-350.4 Car Audio Amplifier

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KX 350.4 cuts off and goes into protection mode at half volume.

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  • curtishowe May 21, 2011

    All of the above have been tried and it's when I am driving and listeing to music at half volume that it goes into protection mode and shuts down. Is there anything else that you could suggest trying?

  • curtishowe May 21, 2011

    I have had this amp in my car probably since 05 or 06. The speakers are Diamond Audio M3611 and they are 4 OHM speakers./ Just recently I had installed a Pioneer DEH_P7200HD head unit to replace my factory Monsoon radio. I also upgraded the grounds and alternator power lead to 4 gauge with separatre radio amp turn on leads, My car is a street and strip car and has under drive pullies on it, so the big tthree wiring upgrade has helped in keeping voltage from droppping below 12 volts while driving under 2000 RPMs.Do you think that it is voltage related or could it just be that the gain is too high. I have not heard of this car needing fans in the hatch area so what might it be.





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  • Master
  • 3,018 Answers

  • When an amp goes into protect mode I always like to remove all the wires and start hooking them up and see when it goes into protect mode.
  • If the amp goes into protect mode after hooking up the power,ground and remote wire then your wires are bad, you amp is defective or the amp is bolted to or touching the metal of the car.
  • Never run wires through door frames as they will be crimped and break.
  • Driving your amp to hard for to long and the thermal protector kicks in and shuts the amp down until it reaches a proper cooled temperature.
  • Make sure you don't have the amp bolted to metal on the car itself. Place something non-conductive in between the two.
  • Check to insure the ground wire remote wire and power wire are connected proper and that there are no crack is the wires. That goes for the RCA cables as well.
  • If your amp goes into protect mode when hooking up the speakers check the wiring and make sure you don't have the speakers wired at to low of impedance.

Regards, Tony

Posted on May 21, 2011

  • 1 more comment 
  • Iron
    Iron May 21, 2011

    • How long has it been doing this? Is it a new amp? Or new to you? What speakers are you using? Ohm rating of speakers? Half power is very low for protect mode to kick in. And you switched RCA cables for a try and checked all connections? How long has this amp been hooked up in it's current location? Are you bridging the speakers? I need these questions answered to help me help you. It may be time to open the amp and have a look.



  • Iron
    Iron May 21, 2011

    • The output of that Pioneer is definitely going to put out more to your amp than that stock deck did. The gain might need to be turned down a bit on that amp. That deck could be feeding a bit much for the gain setting. Tell me is the amp, regardless of setting, getting hot to the touch when it shuts down?


  • Iron
    Iron May 21, 2011

    • Before I forget you want 13.8 volts going to that amp at all times it is performing. 12 will starve it after a bit. Although I don't feel this is the problem.




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