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Subs and Amp for a car?

Car amp isn't powering subs?

  • I have a kac-9104D kenwood amp hooked up to 2 12" jl w6's. I have had then hooked up before then took them out for about 2 weeks and now I'm putting them back in. All I did was take the subs out not the wiring or amp that has been just sitting in there. And if you have this amp you know that there is always a blue and red light on. Now there is just the red no blue. Does this mean its in protective mode but if that is what it means how would that happen because the subs were working all they way up until I took them out now don't work. Is there any trouble shooting I can do to figure this out. My setup is battery to amp. Ground to amp. Positive wire to positive input in subs negative wire to negative input in subs. I have checked all the fuses and that is not it. The remote wire is working because red light only goes on when I start my jeep. Would a new grounding do the trick? Please help me out! I was reading something about matching the right ohms? Or impedance level I have no idea how to do that help me out on this 10 points to best answer

  • Answer:

    if it worked before it will work again unless dampness got into the amplifier from sitting,i would clean up battery terminals and the ground from amp to chaise clean steel is a must and disconnect the ground then reattach to see if it will reset the amplifier itself.if you have a friend with a extra amplifier swap it out to test.or even better install your troubled one in his ride and see if it still dose the same thing.the cause of this could be wiring the amplifier at to low a ohms load.go to rockford fosgate.com then look for a page that's set up like index cards,find the one that tells you its the wiring wizard and use that to see if your sub woofers are wired right,if they recommend a 4 ohm load that's the way you wire them.look at the chart that is the wiring wizard maybe this will help you out.if its all lost there is aways eBay then car audio then class d amplifiers,they have new and used amps and i have used many parts from that sight and they aways stand behind whats sold on their site.they call it eBay buyer protection so you can't lose even if you buy used.

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Is the RCA cables plug in? I don't know about the kenwood 9104D the D sounds like it a mono amp should be stable down to 2ohm or 1ohm try wiring amp to one subwoofr or if can try a differnt subwoofer see if tht works if does its wiring be sure speaker wires are plug in, think the jlw6 are dual voicecoils @6ohms wiring 1parallel will go down to 3ohms wiring two should be down to 1.5ohms you can wiring the dual voicecoils in siries almost like a flashlight battery and parallel or both to match your amp the lower the impedence the more pwr,mono amps go to 2ohm some down to 1ohm but puts more stress on alternator if u go down inpednce its best to get a cap fr amp if runing over 400watts rms make sure neg&pos speaker wire are wired right frm amp let's us know if u get it2 work &what happen I like to knw lol

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