Question about Kicker ZX650.4 Multi-Channel Amp - 480W ZX Series 4-Channel 650W Bridged Remote KickBass Car Audio Amplifier

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Amp Power LED Display blinks red and no sound

I have the Kicker ZX650.4 amp. When I installed it, it worked fine, but when i hit a sharp turn the other night it stopped working. The power LED on the front now blinks red very interminantly. The ground is good and the amp is getting power, and the remote is connected because it only blinks when the stereo is on. The RCA inputs are also getting voltage according to my multimeter. The fuses on the amp are good. Anyone have any idea what is going on? The manual for the amp does not even have a blinking red light listed as a potential problem in the troubleshoot section.

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  • gustavo7 Mar 02, 2008

    mine stopped working on my way home. it was during a turn but i dont think it actually had to do with the turn.

  • FecalMyst Nov 21, 2008

    Wow, I have the same identical problem. I had this Kicker amp installed in another car and right before I sold the car, the sound from my front left speaker started to cut out on turns periodically (left to be specific). I removed the amp when I sold the car and reinstalled it in a new one with all new wiring, speakers and head unit. About 2 months later the amp started to cut out on the front left channel again when making turns just like it did in the other car. I found that after this happens, if I turned the volume up to about -20, the sound would come back in that speaker and then I could turn it down again to a normal listening level. Now the red light stays flashing when the stereo is turned on and emits a weird short swoop sound every 3 seconds from the front left mid driver. I am going to take it apart this weekend and see if there is any thing obviously wrong internally with the speaker inputs.



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With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. Does the voltage on either the B+ or remote pulse below ~11 volts when the LED flashes?

Posted on Jan 28, 2008

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Hi Perry, my amp is doing the same thing and I tried your suggestions and the meter does fluctuate between 12v and in the upper 11v whenever the lights switch between the Power Light and the Protection Light. I unhooked all of the speaker inputs and the RCA cables and it still did the same thing. Should I try and see if another ground will work?

Posted on Feb 23, 2015


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