Question about Alpine MRV-F357 Car Audio Amplifier

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Left Front Channel Goes in and Out

I have this amp set up in 5 channel mode (4 speakers + subwoofer). Every so often the left front channel will cut out. This usually happens when I go over a bump. If I phsyically hit the amp with my hand the sound from the channel usually comes back. It seems that the channel cuts out more when the amplifier is upright rather than laying flat.

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Left channel there is a problem use a tester to locate the bad transistor

Posted on Sep 18, 2007


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go to audio set up and configure the system for 5.1 or higher sound output.then only all the speakers ll work

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if it is a 5.1 channel amp wire the center speakers together into the same port. wire the two front speakers in the or der that they would appear on the amp (such as left front speaker to the left front speaker terminal on the amp etc.) and do the same for the rear speakers. and all you should have left is the sub-woofer channel in which you do not have to worry about.

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Wiring speakers

your main 2 speakers (front left & right)..hopefully the 5th speaker is a subwoofer right if not it will be...the last 2 speakers will be use as the rear (left & right) order for this to sound correct the receiver should have a button (5:1) depressed ...otherwise you just have 5 regular speakers...

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Sounds like the left channel front etc, transistors or whatever powers it have failed. They will be on a heat sink, you just need to identify them and replace them.

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Front right speaker got wet, started cutting out. at the same time the rear right speaker started cutting. switched the rear speakers to opposite channels and this caused the right to work and left to cut....

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PXA-H700 optimum set up...

The way the EQ is hooked up is correct.

You set the factory radio to a set level, then use the volume on the EQ for everyday adjustments.

I believe your problem lies in the amplification.
Your BOSE amplifier was made to run a 4 channel 8ohm stero load.
Low powered - high in sound quality.

You have swapped the factory 8 ohm speakers (15W) for 4 ohm power hungry ones.
Now the amplifier is working harder to produce the same output.

You would be best served eliminating the factory amplifier and getting 1 good 4 or 5 channel amp to power your speakers.

a 4 channel amplifier could be used stereo (left and right) on channels 1 and 2, (2ohm stereo load)
and bridge channels 3 and 4 for your subwoofer.

For a true surround sound - a 5 channel amplifier could run each speaker individually, and the 5th channel is reserved for the subwoofer.

a small dedicated 75wx4 channel amplifier with built in crossover, and level gain controls - would blow your socks off. It is 200x better than the factory 12Watt amplifier. Your ears will love you for it :D

If you need more help - just let me know.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

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RCA cable use

You can plug into the left channel and it will feed both the left and right channels.

To confirm that it's feeding both channels, connect the speaker to one channel at a time. With signal fed into the left channel only, you should get sound when you connect the speaker to either channel.

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Wiring Diagram for Sony car amplifier XM-554ZR

You can download the installation manual from the link below: It has the following diagram plus other hookup info... Please update the question & let us know if the information given was useful to you - Good Luck!

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