Question about Alpine MRD-M501 Car Audio Amplifier

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Alpine mrd-m501 amp

Amp powers up but shows the letters " CURR" on digital screen....doesn't pump any sound

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  • alpinefan1 Jul 01, 2008

    I have 2 MRD 501's connected to 2 12 inch type R's.

    Banging bass.

    All of a sudden on one of the amps the "current" displays on the amp and no volume. I checked all connections, grounds and cables.

    What next?

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The subs cant handle all the power you got it set on turn off all the settings and then turn off your car and remove your face plate and then it should be ok. it does that because the subs cant handle the settings you might just have them a lil high 

Posted on Mar 17, 2009

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Disconnect the speaker wires from the amp, then try it again. If the error message doesn't appear, try connecting the speaker wires back to the amp one by one.

The error message is due to some sort of overcurrent in the amp. If the error does not go away when the speaker wires are disconnected, the issue is most likely with the amp itself and will need professional repair.

Posted on Mar 18, 2008

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1 Answer

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Hello deeprajm,

Shorted or low impedance outputs can cause the "CUR" display. Power down everything and remove the speaker wires. If it will then power up without the display, the problem is probably a short in the speaker wire or voice coil, or the impedance load is too low. If there are multiple subs, reconnect them one at a time to isolate the bad one and then correct the problem. If the amp works properly with either of the subs but not both, rewire the subs for a higher final impedance.

If the amp still displays "CUR" with the speakers disconnected, there's most likely an internal fault that requires component level repair.

Hope this helps.

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2 Answers

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1 Answer

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One of the parts went bad, and you need to take it into the dealer. The way Alpine's error codes work are very vague. E-3 could mean the psu fried, a resistor went bad etc.

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