Question about Kicker 04KX350.4 Car Audio Amplifier

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Amp problem my subs are fading in and out not bad but i can def tell when they r really hitting and when they arent. Does anyone know how i can get a constant sub power.

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Depends on what subs you are using that amp puts out a max rms of 150 watts x 2 no kicker brand sub will run of that low of power. the fading you are hearing sounds like the amp is being overdriven and it is hard clipping because it doesnt have enough power for the subs. that amp is designed for mids and highs.

Posted on Jan 10, 2009

  • wyatt connolly
    wyatt connolly Jan 10, 2009

    if you need a bigger amp let me know what subs you have and i can sell you a great amp that is matched better to the subs you have.

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Something is def. wrong. did you check the fuses on the amp after the light went out? probly have a bad connection somewhere. check ground wire and power make sure they have a good connection and arent cut up and shorting out.

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The subs aren't pushing out bass.


Hello crobins2,

The Kenwood KAC-6202 2-channel is only rated for 60 watts RMS per channel into a 4 ohm load. That just isn't much power for a pair of 12" subs. Even the bridged output is only 200 watts into 4 ohms, still at the low end for a sub, much less to share between a pair of subs.

Assuming that your subs are 4 ohm, you could probably get more sound by driving just one of them on the bridged terminals. But to get the best power with what you have, connect one sub to each channel, set the filter switch to the far right (LPF), set the operation switch to stereo (both channels driven), set the filter frequency (Hz) to 100 or lower, and adjust the input sensitivity as far clockwise as possible without causing distortion.

But, to do the subs justice, you really need at least 300-400 watts to share between them.

Hope this helps.

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try connecting your ground wire somewhere more solid or you may have to get bigger wire, ground and hot, my 12 would kick the amp off if ou turned it up, until i regrounded, bolted it down tight... htts hard!!!

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Hello danijuls,

If the sub is a 2ohm version and you have the dual voice coils wired in parallel, the impedance load is 1 ohm, too low for the ZX400.1 which needs a minimum of a 2ohm load. This would definitely cause it to heat up and go into protection.

But yes, if the sub is wired for an impedance load that the amp can handle, it's possible that the amp is not getting enough power. Check all of the connections and make sure that there is no rust or corrosion on the wire ends or terminals. Remove it if there is. Cut a little bit of the end off of the wires and re-terminate. Check both ends of the primary fuseholder. And don't forget the ground connections.

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If you know how to use a multimeter, you can test the amp this way:

-unhook the subs
-hook up a cheapie speaker you know for sure works to one of the channels
-unhook the audio inputs
-turn the amp on
-set your meter to VDC
-put the positive probe on the inside of the input connector, being sure you make contact with th inner contact
-take the negative probe and tap it on the outside of the connector

What you are doing is sending a low voltage (replicating an audio signal) into the amp audio circuit and allowing the amp to amplify it. If the amp makes the speaker pop each time you strike the probe, the amp is working.

There is an inherent problem with band passes. The naturally filter out high frequencies like a crossover, including distortion, so it makes it hard to hear when the subs begin to protest.

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hi, sounds like u have a problem with the remotebass connection socket. the socket has little pins inside, check to see if they arent touching each other. also try not using the bass control, then try one sub at a time. u may find that one of the subs or sub spk wires cub be faulty. cheers.

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