Question about Clarion ProAudio APA4320 Multi-Channel Amp Car Audio Amplifier

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Noise coming thru speakers

The Clarion apa 4203 has lots of noise coming thru the speakers. The ground wire seems to be ok? Any suggestions. Thanks Hugh

Posted by hugh johnston on

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May be the ground of the rca or in your stereo. and many times in the inlet of the amp. good look.

Posted on Feb 12, 2007

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Have clarion cz200 receiver hooked it up it powers up and everything just fine but no audio...checked everything and it seems fine but no audio am i missing something? its in a 1981 chevrolet c10 pick up

With this particular unit you have a Tele mute which is cell phone related to mute volume when your cell phone rings if this is grounded then you have a problem.

1) Verify that the speakers of the vehicle are correctly hooked up , you can test your speakers by taking a 9 volt battery and touching the positive and negative leads of the speaker wires (make sure they are disconnected for radio) you should hear a click.

2) Take a volt/ohm meter set it to ohms touch the leads together this is continuity. Next touch the wire leading to the speaker to be tested and place the other lead of the meter to the bare metal of truck. If the needle pegs all the way over you have a shorted wire.

3) If using a seperate amp to power the speakers you need to insure that all connection to the amp are made properly and grounds are correct.

here is a link to clarions website to provide a troubleshooting manual.
http://www.clarion.com/us/en/MungoBlobs/341/106/CZ200_EN.pdf

One other thing to check is the center channel balance as if it is biased you need to adjust it.

There are only a few simple things that can cause no audio output
1) Volume not correct
2) Audio output connections incorrect
3) Speaker wires are bad
4) damaged speakers
5) tele mute is grounded
6)Speaker wires insulation is cut and grounding out or is not making a good connection
7) worst case Radio is defective ( it happens)
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CMV1 is not working. When I press power button the

Check your grounds, you may have a bad ground connection behind the radio in the harness or your marine battery is having a ground issue, check that out first if that checks out ok then check out your speaker connections and make sure that they are wired ok. My experience with speaker thumps and pops has to do with ground.

Good luck.
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My Clarion AM/FM,CDMP3,marine radio will play when...

    I had the same issue with a blown speaker that was shorting it
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    Step 1: Disconnect all the speakers from the head unit and try again. If the same message comes up, send the unit in for service.
    Step 2: If the message goes away, you have a wiring problem. Check each speaker lead for a short circuit, damaged speaker or a ground to chassis.

    Basically means one set (or more) of the speaker leads are touching each other (shorting out). This can be somewhere inline to your speakers or your speakers them selves. The advise above isn't to clear. In the first step they want to rule out the speakers attached but "disonnecting all the speakers" is vague. You should disconnect at the rear of the radio. This might be difficult because the multi plug in the back has the speakers and power wires together (at least most clarions). Also if it was a good install then the outgoing speaker wires were soldered to the long run speaker wires going to the speakers.
    To truly test for radio fault verses the wiring or speakers, you have to sever the connection at the back of the radio. If this is not something you wish to do then there is one suggestion. Order a new multi plug for the back of the radio. This way you can pull the old plug and test it with a new plug with no speakers attached (just have to run 12v positive and negative).
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Need wire colors power,ground,speakers/clarion arx6670zterryrose

yellow battery
red accessory
black ground
purple right rear + speaker
purple/black right rear -
green left rear +
green/black left rear -
white fr left +
white/black fr left -
grey fr right +
grey/black fr right -
blue auto antenna
blue/white rem amp
brown phone mute
orange/white illumination


pls rate people arnt rating hope this helps
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No power in my clarion i check the fuse and the wires is ok

Check your remote wire. (should be a small blue one in between power and ground) You can also take a voltage meter to check that your CD player is sending the remote signal down the wire when it powers on. Make sure your ground wire is securely grounded to a good source. Make sure its not on a painted area, etc. Find a good bolt on the frame or body. If none of this helps, you can open the amp and look for bulged capacitors on the circuit board.
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make sure the speaker wires in the car do not have one side grounded.the output on the clarion is a floating output and cannot be grounded.the best solution is to look at the wiring on each of the speakers,and match them out to the ones on the clarion.the most common colr code is white front left,gray front right green rear left and purple rear right.each speaker has a plus and minus.mixing them up will result in the speakers being out of phase and result in poor bass performance.i would wire the wires directly to the clarion using crimp connectors.the first thing i would do is power up the stereo out of the car to 12 volts,and using a speaker make sure you have sound coming out.the yellow wire which is the clock/memory is a must to be connected to constant 12 volts or no sound can result
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Installed a clarion radio it powers up but no music thru speakers

sounds like a short in your wiring to your speakers the best thing to do to check this is run a speaker wire directly to the speaker from the stereo check it that way and see if it works.If that don't work it's the wires on the stereo connection.The speaker wires on most aftermarket stereos are mostly colored 2 of each green,purple,white & grey.
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Replacing Clarion Radio cassette in 200 Impreza

yellow battery
red accessory
black ground
purple right rear + speaker
purple/black right rear -
green left rear +
green/black left rear -
white fr left +
white/black fr left -
grey fr right +
grey/black fr right -
blue auto antenna
blue/white rem amp
brown phone mute
orange/white illumination


pls rate people arnt rating hope this helps
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Sound problem

Make sure all speakers that are hooked up sound ok. If any of them sound lower then the others or sound distorted you may have a speaker with a partially shorted voice coil. If speaker or speakers pop when power is first applied you may have a grounded speaker that should not be grounded. Each speaker wire rides on 6vdc and if any speaker sees a ground you will have 6v across voice coil which would explain any popping noise when first turned on and radio may play for awhile then overheat. be sure speakers are 4 ohm min per ch otherwise amp will run to hot. Just a few Guesses
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