Question about Alpine MRD-M301 Car Audio Amplifier

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Amp problem I have an Alpine MRD-M301 amplifier and was wondering why it wasnt powering my sub/ working, It has everything hooked and wired up but for some reason it wont work, well the LED screen turns on and it says that there are between 12 and 14 volts going through it (depending whether the engine is turned on) But says that ther are no amps running through or from it and thus not running my sub How do i fix this problem? Any help would be greatly appreciated!!

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Make sure the amplifier setting "disable" is off then turn off remote power and turn back on.

Posted on Dec 24, 2007

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Lower the voltage to an appropriate level. The amplifier needs to automatically reset.

Posted on Jun 10, 2009

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First of all make sure your ground is secure and that you have a contiguous ground run from the battery to the amplifier. Once that is done check all of your connections to the amplifier, the remote and the radio/stereo. After checking your connections turn the unit on if no sound comes from the subwoofer, then we can rule out connections as the problem, and can concentrate on the amplifier. You will need a schematic diagram of the amplifier, a multimeter to measure the DC voltages with which to compare to the diagram, and finally an oscilloscope to view the audio waveforms. first take voltage measurements of the major test bpoints to see if they are in accord with the schematic diagrams, if there are any deviation correct these. Once the DC voltage corrections are made check the signals at the test points on the unit with the oscilloscope. At some point you will come to a point in the path that should have signal but it does not, this ares is the area you should concentrate on. Thank you, Shuttle83

Posted on Oct 09, 2007

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1 Answer

I have a alpine mrd-m300 amp and it will come on the voltage meter comes on and everything comes on i just get no sound to subs i hooked it up to another amp and it work just can get sound of of this amp...


Make sure your safety mode is off. Go to mode 9 and ENT and make sure it is off. If it still dont work you proabably have bad RCA wre or speaker wire. Hope this helps!

Mar 02, 2013 | Alpine MRD-M300 Car Audio Amplifier

1 Answer

How much


http://www.shopping.com/xPO-Alpine-Alpine-MRD-M301-150W-x-1-Car-Amp-Mono-Subwoofer-Amps

Jul 31, 2009 | Alpine MRD-M301 Car Audio Amplifier

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Alpine MRD-M301


you could have a bad ground or the power wire could have a short i would start there

Jun 25, 2008 | Alpine MRD-M301 Car Audio Amplifier

2 Answers

Alpine MRD M301 just flashes


disconnect all inputs and outputs then restart it if problem persists you have a internal solder bridge youll need to have it repaired by authorized repair shop or buy a new amp at wholesale from this site:
www.godspeedaudioheaven.com

Mar 11, 2008 | Alpine MRD-M301 Car Audio Amplifier

1 Answer

V12 / xplod issues questions


sounds to me like you have a poor ground, which is causing the amp to overheat. make sure you have as large a gauge wire for the ground as you can and make sure it has a good connection to metal this should solve your problem.

Dec 19, 2007 | Alpine MRV-1507 Car Audio Amplifier

1 Answer

Amp shuts off


is this a new problem or has it always done it?? it mos tlikely needs repairs, but try this first. Hook up ther + of one sub to the speaker + on the amp. Hook the - of that samne sub to the + of the other sub. Then connect the - of the other sub to the speaker - on the amp. This will run the speakers in series and will put alot less strain on your amplifgier. It will not "hit" as hard but it sbetter then having it shut of fall the time. I would also make damn sure that:
Your ground wire is large enough and properly grounded. It should be BOLTED to a solid poiece of metal on your car. Use a screwdriver, whatever so scrape off any rust as the connection should be a clean, BARE METAL connection. Next make sure your power wire and fuse are ok. If you are using round glkass fuses, replace it even if it looks good. I have seen those fuse smelt the solder in the ends. They can look great but really be bad.

SO go through all the basics and if it still gives you problems then it needs repaired. Please dont rate me un-helpful.

Dec 08, 2007 | Alpine MRD-M301 Car Audio Amplifier

1 Answer

Powers up but no signal


Check your gain pots as well as audio pre outs on amp. sometimes pre outs will get loose and be unable to make a connection.

Jun 19, 2007 | Alpine MRD-M301 Car Audio Amplifier

1 Answer

Correct settings


I am not familiar with your amp, but any amplifier performs best when the output stage effective resistance exactly matches the load resistance. So, read your 15" subs and find out number of ohms, then set the amp to that number. according to your amp's specs: if you have 2 ohm speakers, you can draw 350 watts from your amp. so purchase 2 ohm speakers

May 31, 2007 | Alpine MRD-M301 Car Audio Amplifier

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