Question about Alpine MRD-M300 Car Audio Amplifier

1 Answer

No sound from subs

Pontiac Vibe Stock Radio

displaying " - - - " for amps

Hooked up to 2 JL Aduio 10" subs (daisy chained)

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  • kkidesign May 21, 2009

    Clarification: the Alpine m300 amp is displaying " - - - A"

  • Anonymous May 24, 2009

    the Alpine m300 amp is displaying " - - - A"

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  • 13 Answers

No sound is produced. ? The output disable mode is turned on. ? Refer to the instructions at ?Output Disable Mode? to turn the output disable mode off.

Posted on Jun 10, 2009

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Posted on Jan 02, 2017

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2 Answers

Mackie srm450 amplifier low sound


are you running a sub, daisy chained to it? are they connected to each, just have one, two, four? are you hooked up like in the pic?

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Jan 03, 2017 | Mackie Audio Players & Recorders

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No sound


ok if u have a radio with sub controll make sure its on an make sure that you have the gain bassboost turned up an if it has a crossover switch make that its on

Jul 24, 2010 | Jl Audio 1000/1 Car Audio Amplifier

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I hooked up my two 10 inch JL Audio W3v2 2 ohms to a mono JL Audio 500.1 amp and the subs will not work. I have the subs wired in a series. I then hooked them up to my friends amp and the subs worked. Any...


try one at a time. if they work then try hooking them up differently. if none work, then check to see that your amp is not in protect mode. if amp is ok, then check to make sure you have your rcas connected to your amp. in other words, re-check all your wiring. if still nothing, try your amp on your friends car and vise versa.

Apr 01, 2010 | Jl Audio 10W3v2 Car Subwoofer

1 Answer

Jl 12w3v3 started smoking after hookup


Dang man you roasted it, take it in and get it replaced.Check the gain on the amp try it at 1/3 to 1/2 gain and dont crank up the bass boost all the way try it at like 2/3 that should clean up your sound and cut down distortion-distortion kills subs by heat.

Jan 31, 2010 | Jl Audio 12W3v3-4 Car Subwoofer

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Daisy Chaining 2 Mono Amps to 1 Sub?????


i beleive they have to be the same amps.an i think they have to be able to handle being strapped together.id look into getting new amps to run it elemental deisgns i know u can strap them together an controll them from the master amp.i dont think alpines handle 3ohms that good either.im going to check a few things an see if u can strap them two amps toghter.if u need more help email me bertman285@hotmail.com

Oct 15, 2009 | Alpine MRP-M500 Car Audio Amplifier

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No sound out of subs


undo all the wires to the amp and the speakers and simply rewire em.

Feb 25, 2009 | Jl Audio 12W3 Car Subwoofer

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Subs sound terrible (Ive tried so many things)


NO it won't be your battery. Sounds more like your deck.

Jan 22, 2009 | Jl Audio 12W3 Car Subwoofer

1 Answer

I bought a 500/1 jl audio amp and also a w7 10 sub


if its cutting off and right back on then check your ground and your power wire makes sure both are connected good and none of your fuse's are blown, either that or you got a wire hooked up backwards in the sub.. but my guess is that the sub is hooked up wrong... that sub should be hooked up in a series or in parallel,

ok if your running just one speaker, it should be hooked up like this and 2 speakers are a different way...

this is parallel :pos to pos , neg to neg, then one wire coming from pos on sub to pos on amp then neg on sub to neg on amp but bridge the amp on your amp should be 2 pos and 2 neg in two different channels take the pos off the sub into the pos on 1 channel and then the neg from sub to the neg on the other channel,

this is series : on the sub it will go pos to neg then the other neg and pos will go to the amp, but make sure the pos and neg r on different sides of the sub, dont hook them both to the same coil

if your need more help give me your email and ill send you a pic of how to do it...


Aug 12, 2008 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

Added another amp to system now subs dont hit as hard


This sounds odd, but try putting your subs out of phase from the mains. Just see if it changes anything.

Feb 16, 2008 | Jl Audio 250/1 Car Audio Amplifier

1 Answer

Only works for RADIO!!!


You're using the wrong control lead. There should be an amp control lead. You're using the power antenna lead.

Oct 31, 2007 | Jl Audio E1200 Car Audio Amplifier

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