Question about Alpine MRP-M450 Car Audio Amplifier

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Odd Problem My amp turns off only when i change the source from tunner it only works in tunner. can someone help me asap?

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Re: Odd Problem

Your amp's remote turn-on wire is connected to the wrong wire at your head unit. Look for a blue/white wire and connect it there.

Posted on Mar 07, 2007

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Sound is only in mono how do i turn on sterio

you have to make sure you give correct stereo signal source to the stereo amp input, you can confirm this by changing your audio source to Left or Right. can your amp speaker out follow the sequence?

Feb 04, 2014 | Blaupunkt Car Amplifiers

1 Answer

Amp light is green getting a base like heart beat nothing else fuses are good

The only thing I'm wondering is if you shorted out the RCAs somehow. Try switching the RCA's to another output on the back of the deck, if you have more than one set.

If that's not will have to add pieces of the system one by one, starting at the deck, to see if you can troubleshoot the problem. Very Odd.

Good Luck

Dec 07, 2013 | Autotek Car Amplifiers

1 Answer

Mtx ampnot working

Try disconnecting the power supply and ground completely and reconnecting it starting with the ground then power and then the remote lead- Ihad a kenwood that was picky like that and if you hooked it up in the wrong sequence it wouldnt go -but once i figured that out- i never had a problem with it again-till someone stole it-.haha good luck-why did you pull the fuse to bridge your amp?thats odd-any particular reason?

May 29, 2009 | Jl Audio E1200 Car Audio Amplifier

1 Answer

Amp neon lights wont turn off

There are two types of power that feed your amplifier. There is a constant power that connects directly to the battery and there's a remote power that usually connects to the remote power output of your deck. Some decks do not have the remote power output, but they have a power antenna output that works just as well.
The remote power is what enables the amplifier to turn off when the car's power turns off.
Either way, it sounds like you have the remote power input on the amp connected to your constant power source.
That would prevent the light from turning off with the car.
If you don't have a remote power or power antenna output on your deck, I would invest in a new one.
However, it is relatively easy to find a remote and a constant power source in your fuse box.
Purchase a fuse tap for a few cents and connect the remote power input on the amp to a power source in the fuse box that turns on and off with the ignition.
Some of the power sources you can find in your fuse box that go on and off with the ignition may be labeled something similar to the following:
ignition, power windows, radio, accessory, etc.
The constant power sources in your fuse box are the ones that don't power off with the car, such as the dome/interior light, power locks, battery, etc.
I hope that some of this helps out a little.

Dec 04, 2008 | Car Amplifiers

2 Answers

My 2000 watt nitro amp just stopped working need help

Think about anything out of the ordinary that may have happened the day (or day before) it quit.
  • Was work done to your system?
  • Did someone mess with your system?
  • Smell anything odd?
  • Especially loud?
  • Did it quit mid-song or did it work yesterday and not today?
Assuming nothing special, here are some diagnostics you can perform. At the very least, they will help tell you what the problem isn't, First....

Eliminate power supply problems.

Use a meter to make sure you have power to your amps +12v terminal. A meter is preferred over a test light to confirm a full +12 volts.

Make sure the ground terminal is grounded. A meter with a continuity test option is best for this.

If either of these fail, trace the wires to find the fault. Large amps like yours normally have dedicated power cables. These cables usually have an additional in line fuse close to the battery. Check it.

If they pass, double check the amp fuse.
Pull the wire (usually blue) from the 'remote' terminal on the amp.
Then try jumping the +12v line to the remote terminal.

If it still doesn't power up, check for signal shorts.
Turn the gains down low.
Pull the input lines and try the +12v to remote jump again.

Next pull the speaker wires.
Your amp should now have only two wires and a jumper attached to it. Try the same jump.

If it still fails, the problem is in the amp itself and (I'm sorry to say) leaning toward the serious.

Hope this helped

Jul 09, 2008 | Nitro BMW-486 Car Audio Amplifier

2 Answers

Pyramid pb8 45x amp bein an ass

too much input, lower the volume of source.

Jan 31, 2008 | Pyramid PB845X Car Audio Amplifier

2 Answers

Amp problem

are you handy with a volt meter, I would first check for shorts, what amperage fuse are you using? Do you know what amperage is reccomended for it? manual?

Dec 06, 2007 | Car Amplifiers

1 Answer

Concept CC-2502 Car Audio Amplifier

The amps are probably going into protection mode. The wires are most likely not hooked up correctly. Make sure you have a good ground, good power source, and the remote wire is run correctly. Also make sure the speaker output wires aren't touching each other, and you have the correct ohm load for the amp. What kind of speakers/subs are hooked up and how are they wired?

Sep 20, 2007 | Concept CC-2502 Car Audio Amplifier

1 Answer

Amp turns off when head unit is playing cds

Connect the remote turn on to the blue wire w/white stripe coming from the head unit, NOT the solid blue wire which is the antenna turn on.

Oct 28, 2006 | MTX Thunder 421D Car Audio Amplifier

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