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Posted on Jan 15, 2010
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Every time i hook up my coustic car amp the radio will turn on with out the radio on

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Professor_V

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  • Expert 93 Answers
  • Posted on Jan 16, 2010
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THE GOAL HEAR IS TO DETERMINE IF THE INSTALLATION IS CAUSING YOUR PROTECTION FAULT OR IS IT THE RADIO OR AMPLIFIER ITSELF HAVING INTERNAL DAMAGE. REMOVE THE RCA INPUTS AND DISCONNECT THE SPEAKERS, THEN POWER THE AMPLIFIER UP WITH THIS NO INPUT, NO SPEAKER LOAD CONDITION. IF IT STILL POWERS UP ON ITS OWN, THEN REMOVE THE REMOTE TERMINAL COMING FROM THE RADIO. IF THE AMPLIFIER SHUTS OFF, THEN YOU MAY HAVE A SHORTED TURN-ON TRANSISTOR WITHIN THE RADIO AND IT IS OUTPUTTING THE DC NEEDED TO TURN THE AMPLIFIER ON. IF YOU REMOVE THE REMOTE TURN-ON FROM THE RADIO TO THE AMPLIFIER AND THE AMPLIFIER STAYS ON, THEN THIS POINTS TO A FAULT WITHIN THE AMPLIFIER AND IT WILL NEED TO BE SERVICED. MAKES SURE THAT THE AMPLIFIER AND RADIO GROUNDS ARE 100%. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

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Anonymous

  • 506 Answers
  • Posted on Dec 30, 2009

SOURCE: i have a kenwood kac-728s and two coustic 10in.

That is pretty much saying that the amp's power supply is shorted or at least has a low resistance path to ground which is causing the fuses on the amp to blow. The amp has protection circuitry to prevent damage to the output stage so that is not what is causing this. Is the amp new?

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Car Amplifier
Hi - You can download the manual by clicking the link underlined in blue below:

Coustic 480

b25e186.jpg


So the startup red led shows an over current condition, if your sure the speakers are OK then you will need to go "under the hood". The best start for this is the following web site:

Basic Car Audio Electronics

This will give you a basic guide to troubleshoot the amp.

Please take a moment to rate this solution & let us know if the information given was useful to you - Good Luck!

Informatica



Please take a moment to rate this solution & let us know if the information given was useful to you - Good Luck!

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What is the wire diagram for a coustic 108 car amp

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