Question about Alpine MRP-M1000 Car Audio Amplifier

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When i turn my head unit to cd mode the amp shuts off. why is this?

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Your amp remote wire is hooked up to the power antena wire therfore when your tuner is on so is the amp when u switch to cd there is no power to the antena ive done that before

Posted on May 08, 2011

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My car stereo shuts off while driving and playing


if you have had the head unit for long, it might be over heating and going into safe mode so it doesn't get to hot. This happened to my amp and i never did anything until it stopped working all together. so my guess would be just to get another head unit or get some type of cooling system.

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1 Answer

My amp is working fine but turns off when i insert a CD


Hello pumpin_up_da,

The most likely cause for the problem you describe is that the remote turn-on lead to the amp is functional only when the head unit is operating in tuner mode. This could be caused by using a power antenna lead instead of a remote lead. Some head units have both, some only one or the other. Check the wire going to the amp remote terminal with a voltmeter. If it shows 12V when the radio is operated in tuner mode but 0V when you switch to CD, then check the wiring. If this is the cause, and your head unit has a dedicated amp turn-on lead, then connect it to the amp terminal. Most head units that have both power antenna and remote leads code them "Blue" and "Blue/White". If your head unit does not have an amp turn-on lead, you need to wire it to a 12V switched source, usually the "red" wire on most aftermarket receivers. You can then put a SPST toggle switch (available at Radio Shack or most auto parts stores) in line with the wire and turn it on and off as desired.

If the correct wire from your head unit is currently connected, then the receiver is defective and needs repair or replacement. Or, if everything else still functions normally, and really don't want to bother with repair or replacement, you can still use the 12V switched source as described above.

Hope this helps.

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Hello daweeksy115x,

You did not specify your install specifics, but the trouble is probably the head unit "remote turn-on" lead. Some head units will have both a power antenna and a remote lead. If you inadvertently wired the amp turn-on to the power antenna lead, it can cause the problem you described.

If you head unit does not have a dedicated remote lead, the best solution is to wire the amp turn-on terminal to a switched accessory 12V source.

Hope this helps.

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1 Answer

Amp shuts off when switched from radio to cd


your amps rem wire is hooked to the power antenna wire on your head unit and so when you turn off the radio you would nolonger need an antenna so it powers down and would lower the antenna.Depending on the head unit you should have one output for the power antenna and one for the amp rem......If your head unit doesn't have the rem output you can wire it to the switched wire that powers your head unit but keep in mind the amp will stay on while you have the key in acc or run position even if your head unit is off.
hope this helps!

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1 Answer

Wiring


tblackwood ...if you have connected your remote turn on for your amp to the remote turn on on the deck(this is also the power aerial connection) ..on some decks this has power only when the radio is operating. as soon as you insert cd it shuts down the power to this supply(i dont know why some did this.it was a bad move ) ..you may have to find another power supply to turn the amp on (accessories supply on the ignition..)

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was the head unit new if take it back if not get a new one good luck

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It shuts off because the remote turn-on wire to the amplifier is connected to the power antenna wire behind your head unit. The power antenna wire is only activated when the tuner is selected. You need to switch the remote wire to the blue/white wire from the head unit (currently you're using the blue wire). This is the true remote output, and will activate the amp whenever the head unit is powered on.

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Amp shutting off going into protection mode


Check this out: http://www.techlore.com/article/14696/

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