Question about Kenwood KDC-516S CD Player

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Lights up but will not play music

The RCA cabels going to my amp rubbed aginst the frame behine the head unit and crosed out. Now it will not play sound but will come and act like it is.

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Check the RCA cables input,example your RCA input is AUX and the input selection in the control pannel must be selected AUX.

Posted on Mar 01, 2007


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I have a BA PV 800 sub that powers on but will not play. I have a static type of sound coming out of the unit that appears to be in line with the music playing. Any ideas on what might be going on?

Subwoofers are just mono amps. So if it not producing any sound then the most likely cause is the failure of the main amp that does all the work.

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Just got this unit and had a similar issue, but mine was getting the iphone to play at all. On advice of the sales rep I bought the kit required to view movies with your iphone. The kit plug into the back of your radio using rca jacks and then utilizes the usb port. I can now use my iphone to play audio, movies and utilize i heart radio.

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Amp stopped playing riding down the road, power light turned off. came back on when i unplugged the rca's and cuts back off when i try to plug them back in.

Faulty RCA cables, Or worse possible solution is if your amp stopped playing when it was pumping at high volume, you may have blown the RCA connectors inside your head unit Or inside your amp. If possible try another known good working amp with the wires you already have, If same happens, try different RCA cables. If problem persists after trying these, Its your head unit RCA connecters or amp RCA connectors. To rule out your amp connectors, try your amp in a friends car if possible, to rule out your head unit, try another good known working amp in your car with the wiring you already have

Mar 03, 2011 | Kicker ZX300.1 Car Audio Amplifier

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The head unit is saying amp gaurd and will not play anything

it sounds like ur unit is protecting it self from the amp, i wud recheck the amp & amps wiring all the way too the unit & if i found nothing ten i wud check the wiring to the unit, or maybe ur rem or rca wires cd b the prob. check them as well..hope i was of help

Jul 11, 2009 | Clarion DXZ855MP CD Player

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I got 4 ''15 inch kickers 2 5500watt power acoustik mono amps my problem is 2 kickers on the right side hittin hard but the 2 on the left not.i thought the amp on the left was bad so i took the rca of the...

Hello herb31,

It sounds like there is a difference in the signal levels on the inputs to the amps. You did not specify what the RCA's are connected to on the head unit side. If they are connected to a stereo pair of preamp outputs, you may be able to solve the problem by using only the channel with the higher signal and use an RCA "Y" adapter to split it to both amps. If they are connected to a dedicated subwoofer output on the head unit, make sure that the head unit is set for "subwoofer". Some less expensive head units, I know JVC in particular, has only 1 set of line outputs and requires you to go into their "PSM" (Preferred Setting Mode) to set the line output mode and if you select "subwoofer", then allows you to select the low pass frequency.

If you are converting speaker-level outputs through a "line out converter", check both the input and output levels.

Also, if you are splitting an output from the head unit, you still need to connect 2 RCA's to the amp inputs. The signal will be properly split if you use a 1-female to 2-male "Y" adapter. To feed the same signal to both amps, you would need 3 "Y" adapters. Feed the output signal to the female end of the first "Y", and plug the male ends into the other 2 "Y" adapters. Then, the 4 plugs you have left on the ends go into your amp inputs.

Hope this helps.

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When boss dictates a letter I can barely hear any sound!

The tape might be getting old, replace it and see what happens.  If it is still acting up, It might be he is not recording properly or the recorder is bad.  Try talking directly into the mic and see if it is better.  If it is, he needs to talk louder or needs to hold it close.

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I hooked up a 4 ch alpine amp MRP-F600. The back speakers play nice but the front speakers play very low. What could be the Problem?

1)When you connected the amp to the head unit, did you run two pairs of RCA cables for front and rear reference or did you only run one set of RCA cables from the rear out to the amp?  2)If that's not the case and you did ran two sets, on your amp, swop the rear and front RCA cables. If the rears go quiet and the fronts are loud you now know the issue is either in the cables or how the head unit is set up. If the fronts are still quiet, check your Amp's gain, frequency and filter setter settings (if available). If those settings don't change anything you may have a faulty amp. 3)Check speaker connections, seems trivial, but you never know.
Message me back if nothing works and/or you get stuck.

Nov 04, 2008 | Alpine Car Audio & Video

1 Answer

My car amp works produces distorded noise . As I plug in the rca cables i noticed that if just the tip of the connector touches i get a good sound but if i insert the whole connector it becomes distorded...

You have a grounding issue.

The RCA inputs of the amp are many times NOT tied to chassis ( the chassis of the car ) ground.

Same goes for the RCA outputs of your head unit.

The speaker outputs of your amp SHOULD NOT EVER be tied to chassis ground.

  • make sure that no speaker wire from the amplifier is touching or attached to ground.
  • Make sure that your amplifier ground (GND )( of the 3 power inputs.....GND, +12V, Rem) is securely mounted to a bare metal spot on the frame. Best practice is to have the amp GND, and the head unit GND at the exact same physical point.
  • Make sure that your RCA cable shield ( not the center tip, but the part around it ) is not touching the chassis.
  • Make sure that you have not nicked the wire while installing it and are accidentally getting a connection to the frame of the car.
  • Make sure that the head unit is grounded properly.
  • IF for some reason you have an equalizer between the head unit and the amplifier, make sure it has its own switching power supply INSIDE the EQ.
Bad grounds are a pain to of luck....Rob

Mar 17, 2008 | Audio Players & Recorders

1 Answer

Protection light turn on with sound

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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