Question about Kenwood KAC-9152D Car Audio Amplifier

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Red light stays on no sound. rca cable grnd, must be connected?

The rca cable ground is not connected. is that the prob? are they special cables that are grounded or you just put a seperate wire to a ground source?

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  • TDWPgtp May 11, 2010

    the wire that is inbetween the RCAs is probably just a remote wire. do u have everything else connected properly? are any wires crossed or touching? have u checked the fuses? has the amp ever worked properly

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What do you mean the RCA cables are'nt grounded? All RCA cable have a ground. What kind are you using? The round metal at the end of the RCA cable is the ground. The silver or outside of the line input on the amp is the ground for the RCA cables. Anyway, that would'nt stop your amp from coming on. I suggest you take a piece of wire and ground it to the amp and touch the metal piece on the RCA cable and see if you get sound. Even if the RCA cable is'nt grounded you would get some type of sound coming out of the amp maybe. If you do it will sound like it's cominf thru a long tunnel, like a reverb effect. I have never heard of an RCA cable not having a ground. ARE you sure you have RCA cables? Let me know and send me a pic if you can of the input of the amp so I can see how you have it hooked up.

Posted on Jun 05, 2009

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Jerry G.


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It's likely that the amp is defective but you should check the shield ground of the RCA signal cables before sending the amp off for repair.

 

Disconnect the RCA cables from the amp.

 

With your multimeter set to ohms, measure the resistance from the outer shield of the RCA cable to chassis ground. If it's more than a few ohms, that could be causing your problem.

 

If this is higher than a few ohms, short the meter's leads together to make sure the meter will go down to 0 ohms.

 

To check the shield ground of the head unit (assuming that the head unit is driving the amp directly), disconnect the RCA cables from the head unit and measure the resistance from the RCA output shield to the case of the head unit. It should essentially read 0 ohms.

 

 

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