Question about Alpine MRD-M1005 Car Audio Amplifier

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No sound from the amp

I have a alpine mrd-m1005 v12 and the amp is on but the display on the amp say off the rcas are all right and the power lead is fine but there is no sound can u help me

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Re: no sound from the amp

Make sure that your amp turn on wire is connected from behind the radio to your amplifier. Usually the turn on wire is a blue wire but it can be any. This blue wire connects from the blue/white wire behind the radio to your small connection turn on connector on the amps power connections. You have 3 ( 12V , Ground, Switch or the smallest connector)


Also check the amplifiers fuses, and the main powerline fuse as well. If this doesnt work then write back to me.

Posted on Oct 21, 2007

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My alpine v12 turns on but no sound

no you don't have to hook up both of the power terminals. but should have it hooked up so you get the proper power to the amp. use a disubution block with two 8 gauge wires.

do you know if the radio's rca jack's are good? have you ever had another amp in the car? if it worked before try new rca's from the radio to amp. recheck all connections from amp to speakers and make sure no wires fell off.

Sep 22, 2009 | Alpine MRD-M605 - V12 MONO AMP 600WX1 RMS...

1 Answer

When I hook my JL W7 sub to my alpine mrd m1005 amp the sub is pushed out and stays that way

Hello christensen7,

It sounds like there's DC current on the amp output terminals. Disconnect the sub and test the output with a multimeter. If there's DC there, most likely the amp is shorted internally and needs repair.

Hope this helps.

Aug 17, 2009 | Alpine MRD-M1005 Car Audio Amplifier

1 Answer

When I hook my JL W7 sub to my alpine mrd m1005

You need to have the amp bench tested at a car audio shop. Sounds like a dead short in the amp. Try turning the crossover on the sub "off" and connect any other speaker to it. if you have the same outcome, your amp needs serviced. Post a comment with your results and if I can think of anything else you could try beyond that I will. Hope this helps

Aug 17, 2009 | Car Amplifiers

1 Answer

CUR on alpine MRD M 605

check your ground and make sure you battery power is connect properly

Apr 14, 2009 | Alpine MRD-M605 - V12 MONO AMP 600WX1 RMS...

1 Answer

Amp powers on, no sound from subs

the output is blown. It is in need of service.
There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause.

Dec 28, 2008 | Alpine MRD-M1005 Car Audio Amplifier

1 Answer

Mrd-m1005 amp fans not never turned on?

the fanns will come on around 75c they are preset 60 is not that hot for an amp but the cooler you can keep it the better it sounds

Nov 27, 2008 | Alpine MRD-M1005 Car Audio Amplifier

2 Answers

Alpine MRD-M1005 Subwoofer Amp Problem

He may be right! You might try finding a new source of contact for your ground cause it may not be sufficent enough to ground to, also make sure that no wires from the back of your radio have any wires sticking out touching other interfering things that could possibly be causing the noise

Sep 14, 2008 | Alpine MRD-M1005 Car Audio Amplifier

1 Answer

Alpine mrd-m500



Could not find exact, but close manual.  It is the MRP-M450 mono block amp from alpine.


Go to this url and view in Adobe. Print it if you need to

Oct 19, 2007 | Alpine MRD-M1005 500W x 1 mono subwoofer...

1 Answer

Amp is getting hot

amp naturally get hot but not hot enough to burn your finger.if all the speakers working,no distorted sound(sound clear),the problem might be the ventilation(free air flow) of amp.check the blower fan if working or check the exhaust holes maybe it is blocked. here are the other reasons; 1.)speaker wires touched the chassis ground. 2.)mismatched speaker to amp impedance. 3)overdrive input or u tap low input(from amp) to high output(of stereo) 4.)ur amp is out of bias. u need an audio technician for this... hope this help u...

May 15, 2007 | Alpine MRD-M1005 Car Audio Amplifier

2 Answers

Could you help

i have lost the instruction manual for my alpine v12 mono power amplifier mrd-m300 could you send me a print out of it by any chance. Without it i am unsure of the controls on the unit thanks.

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