Question about Alpine MRD-M301 Car Audio Amplifier

1 Answer

Amp shuts off

I have my m301 hooked up to 2 - 10" sonys and for some reason it just turns off i even tried using on individual subs and it works for about 30 sec then just shuts off? any help?

Posted by on

1 Answer

Re: 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.

Posted on Dec 09, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I have an XM-2150GSX 760watt sony amp, ive gotten everthing hooked up to it, but for some reason i have power to the amp but not to the subs, i know the subs are good still (i hooked them up directly to...

If you are hooking 'blue wire' (remote turn on for amp) to the power antenna wire (usually also blue) from the radio that could be your problem since the antenna only gets power when the radio is used

try using the switched 12 volt wire you used to connect your stereo power

i will assume all other wiring is correct and if so this should fix your issue - if not write me back with as many details as you can about how you have things wired and i will try to help more

good luck!!

Apr 15, 2011 | Sony XM-2150GSX Car Audio Amplifier

1 Answer

Have 600w amp 2 10's and they aint even bumpin, DO I NEED TO BRIDGE IT

No, that'll use two channels to power one sub. First, is the gain turned up? There's a knob on the amp to turn it up. If the gain is already up, and if the amp is two-ohm stable, then wire the subs in parallel. I'm assuming the subs are each hooked up to their own individual channel. Swap the two negative wires at the amp, so sub 1 is hooked up to channel 1 positive and channel 2 negative, and vice versa for the other sub. That'll dramatically increase the output. Again, make sure the amp documentation says it is 2-ohm stable, or you'll damage your system.

Dec 24, 2009 | Kenwood KAC-729S Car Audio Amplifier

1 Answer

How to hook it up to system with two 10s 400 watts per sub and two 6x9s at 200 watts each?,subs behind seats, 6x9s in doors. IF i need another amp i have one,to help push. But either way i need your help...

Hello www_mitzjohn,

I'd definitely use another amp.

The 2-channel Sony is well suited for powering the 6X9's but a monoblock would be better for the subs. The different types of speakers running from the same channel will not sound very good and likely it'll be impossible to get the impedances to match.

You'll want to set the Sony to send higher frequencies to the 6X9's, but not to the subs. You can't adjust the channels individually. So, just connect each 6X9 to one channel of the Sony and use a monoblock subwoofer amp for the subs.

Hope this helps.

Oct 31, 2009 | Sony XM-2150GSX Car Audio Amplifier

1 Answer

I have a 650 watt lanzar vector amp hooked up to 2 1500 watt sony subs. my amp is turned up half way and it frequently shuts off and the red protection light comes on.

the problem is that you must have your subs wired to a lower impedance than the amp can handle. Wire your subs to 4 ohms, or get an amp that can handle 2 or even 1 ohms and crank it and enjoy!!!!!!!!!!!

Sep 19, 2009 | Car Amplifiers

1 Answer

Hooking sub up

Hello missywarden,

According to the specifications, the amp is capable of "tri-mode" operation, that is, running normal speakers on the individual channels while also powering a subwoofer in bridged mode.

Your sub needs to be a minimum of 4ohms and should be relatively efficient. I'd look for a sub that has an RMS power range of from about 75 watts up to a maximum of 250 watts.

The sub connects to the leftmost speaker terminal (positive - right channel) and the rightmost speaker terminal (negative - left channel).

It's not going to be a really loud subwoofer. The power is 360 watts RMS which will be shared by the normal speakers and subwoofer.

Hope this helps.

Aug 05, 2009 | Power Acoustik TS620-2 Car Audio Amplifier

1 Answer

1000 w sony xplode works at low volume then red lights at volume5

Most likely one of your subs are blown, or the Ohm's are too low for the ampliphier. Try hooking up one speaker at a time to the amp and see if it does the same thing. If it shuts off on one of the two speakers, that speaker is most likely blown.

Apr 19, 2009 | Sony Xplod XM-1652Z 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

My amp works but my sub doesn't...!!!????????????

Whats the condition of your amplifier? New , Used, Old?


You might have a blown channel off your amplifier, this may cause little or no sound. You will have some distortion, crackle sound and then maybe nothing at all. What kind of subs are you running to it? Make sure the subs arent blown and check the voice coils to see that they are not torn off the subs , these are the 2 little silver or copper wires that are connected from the speaker connectors to the sub itself.


Let me know what happens?

Oct 21, 2007 | Sony Xplod XM-554ZR Car Audio Amplifier

2 Answers

Amp shuts off when music turned up

try adding a capacitor to feed the amp. these are large in capacity (farads)and dims (about 6' x3' dia.)...what wire size are you using?

May 30, 2007 | Sony XM-2002GTR Car Audio Amplifier

Not finding what you are looking for?
Alpine MRD-M301 Car Audio Amplifier Logo

Related Topics:

92 people viewed this question

Ask a Question

Usually answered in minutes!

Top Alpine Car Amplifiers Experts

Tygh Duval
Tygh Duval

Level 2 Expert

290 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers

Are you an Alpine Car Amplifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides