Question about Alpine MRV-F345 Car Audio Amplifier

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Car ausio amplifier

I have recently purchased a ground zero make amp of my friend who got it secondhand from someone in america, and im only using it to power one subwoofer in my car, recently i have noticed that the amp has become to hot to touch, after a short usage, i am using a thick wiring kit aswell, can you tell me wot it might be

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Re: car ausio amplifier

Power up the amp with the volume set to the minimum. Does the amp start to heat up?


What model is the amplifier?

Posted on Oct 16, 2007

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Why does the red light come on when i hook the power wire up to my car amp?

Could be fried, or connections are wrong and its not getting a good ground. If you're not getting power most likely its fried. Check fuses etc. Take it to a brandsmart and have them test it

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you have to run power wire and ground wires to setup the amp.
you have to purchase a hi/lo adapter if you have a stock stereo.
like this:

or have a professional do it for you, or a friend that can do it for you. if you have no knowledge in setting up an amplifier you risk burning down your car, hurt yourself or someone else.

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Bypass the amp with a small speaker or tweeter to make sure your rca input is working. Is the amp light on. Got good power, ground, and remote? Have you tried a different set of speakers on your amp?

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Subwoofer popping noise

i had an amp do that a few years ago i did everything it turned out that it was the cdplayer. then agin myfriend had the problem and it was his altonator he had to get a ground loop isolator they are cheap

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Cant find a constant ground connection

Hello deslamer07,

First remove the primary fuse on the 12V power wire.

Run a temporary wire from the NEGATIVE terminal of the battery to where the amp is located. You do not need to make a permanent connection, just wrap the wire around the terminal enough to get a good connection. Use a multimeter set to the lowest OHMS scale and test between your proposed ground connection and the negative battery terminal. A good ground will indicate near "zero" (or very near zero). If you don't get a "zero" reading, try to find a screw or bolt going into the metal of the vehicle. Again, the meter will read "zero" when you have located a good ground. Reattach the amp ground terminal to the good ground, remove the temporary test wire, reinstall the primary fuse and test the amp. If it was just the ground, you've fixed it.

Hope this helps.

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Mtx thunder 1501d

yes you can not run amps with your speakers being grounded un ground and then try

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My amp not workin

if the amp doesn't play anything but comes on you probably don't have an input signal try to get a different input signal

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No sound to speakers

is the sub dual or single?check sub first then try disconnecting all power including ground for 20min to discarge caps some amps mute if driven hard at low impedience .

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Check your ground wire! Relocate it to another place in the car and try to get a heavier ground wire aswell.

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