Question about Alpine PDX-4.100 Car Audio Amplifier

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PDX 4.100 In Protect Mode..

How do I take an Alpine PDX 4.100 out of Protect Mode? One LED is now red, and used to be blue on the right side.. what does this mean?

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According to the manual, the issue could be:

  • Internal issue with the amp circuitry.
  • A short on the speaker output(s).
  • Power source voltage is too high (aka above 14.5V).
  • Overheating.
The easiest thing to do is to try removing the connections to the speakers at the amp and see if the issue disappears after each set has been disconnected. Keep removing wires until both LEDs stay blue.

Posted on Mar 19, 2008

My pdx 4.1 cut out too but still showed a blue light...it did this after playing mp3s too loud after tuning it for cds or the amount of time i spent tuning it...

To fix/reset Amp cut outs just pull out all the speaker terminals and plug them back in...

Why the **** they dont tell you that in the instructions is beyond me...

Posted on Sep 28, 2008

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