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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Re: Left Front Channel Goes in and Out

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

Posted on Sep 18, 2007

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Rear left channel makes my speaker pop cuts in and ou at certain settings

Swap left and right speakers. Does it stay with the speakers if so you have a blown or damaged speaker. If not then swap input cables only. If it stayed with the speaker you now know the amp has a bad channel and needs repair. If it swapped again you either have a bad cable or issue with your source unit.

Jul 26, 2016 | Kicker ZX650.4 Multi-Channel Amp - 480W ZX...

1 Answer

Can i hook this amp to a 2 channle out put stereo?

Sure. Specs are listed below. I think it's designed for regular 2-channel input, isn't it?


Front Channels: 100 W RMS x 2 @ 1.5 ohm-4 ohm (11V-14.5V)
  • Rear Channels: 25 W RMS x 2 @ 1.5 ohm-4 ohm(11V-14.5V)
  • Subwoofer Channel: 250 W RMS @ 1.5 ohm-4 ohm (11V-14.5V)
  • THD at Rated Power: <0.03% @ 4 ohm (F&R), <0.05% @ 4 ohm (Sub)
  • S/N Ratio (F&R): >108.5 dB below rated power S/N Ratio (Sub): >95 dB below rated power
  • Frequency Response (front and rear): 5 Hz-30 KHz (+0, -1dB)
  • Frequency Response (sub channel): 5 Hz-500 Hz (+0, -1dB)
  • Damping Factor (front and rear): >200 @ 4 ohm/50 Hz
  • Damping Factor (sub channel): >500 @ 4 ohm/50 Hz
  • Input Range: switchable from 200mV-2V RMS to 800mV-8V RMS
  • Differential-Balanced Input Topology: (3 pairs of inputs)
  • Front Crossover: fully-variable (50 Hz-5 KHz), selectable- slope BP or HP (12 or 24 dB per octave)
  • Rear Crossover: fully-variable (50 Hz-5 KHz), selectable- slope HP (12 or 24 dB per octave)
  • Sub Crossover: fully-variable (40-200 Hz), selectable-slope LP (12 or 24 dB per octave)
  • Preamp Output: 2-channel (full-range or LP)
  • Bass EQ: Variable boost up to 15db
  • Infrasonic Filter: defeatable 24dB/octave at 30 Hz
  • Left minus Right Ambience Circuit: ambient effect for rear channels
  • Front and rear speaker output connections: accept up to 8ga. wire
  • Dual mono subwoofer output connections: accept up to 8ga. wire
  • +12V and Ground connections: accept up to 4ga. Wire
  • Dimensions: 19.7"L x 9.25"W x 2.36"H
  • Dec 02, 2010 | Jl Audio 500/5 Car Audio Amplifier

    1 Answer

    How do I use this amp in one or 2 channel modes. The switch on the amp only shows 3 and 5 channel operation?

    Run it in 3 channel with 1 to subs and the other 2 to the right and left front speakers or just don't hook up the channels you don't want to use.
    It would be a shame to not use this amp to its full potential

    Apr 15, 2010 | Eclipse PA5532 Car Audio Amplifier

    2 Answers

    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....

    the speaker getting wet will short it out. Shorting the output on any amp will ruin it. there is a right and left chanel with 2 outputs. Right chanel is damaged.

    Sep 30, 2009 | Boston Acoustics GT-42 Car Audio Amplifier

    1 Answer

    Do not have a sub output on receiver /do not know which wire to plug into the amp sub input/5 channel amp /have rca output for front and rear speakers

    Hello southernbike,

    With a 5-channel amp (stereo L/R front, stereo L/R rear, and subwoofer) you only need the two pair of stereo inputs.

    You do not say which brand and model of amp you have, but most have an output configuration similar to the Alpine shown in this link. Connect the front and rear RCA's from your receiver, your vehicle speakers to the respective output terminals, and your subwoofer to the 5th channel terminals.

    Hope this helps.

    Jul 29, 2009 | Dual Car Amplifiers

    1 Answer

    4 chanel amp I dont know how to conected,to radioand one subwoofer

    Hello canelo63,

    Your question appears under the product listing for the Dual XPA4100 but the in the text you say the amp is actually a Jensen, so it's not possible to provide specific connection information.

    But most bridgeable amps can be connected to a single subwoofer and the other two channels used to drive a set of regular speakers. I'd connect the front speakers to channels 1 and 2 and wire the subwoofer to the bridge connections of channels 3 and 4. On the XPA4100, the bridge terminals are the first (negative) terminal on channel 4 and the last (positive) terminal on channel 3.

    Hope this helps.

    Jun 01, 2009 | Dual 2-Channel Bridgeable MOSFET Amplifier...

    1 Answer

    I wish to know the correct way to connect a Schneider 800w amp Model:spa-9705. What I have is a lead from my deck(marked sub woofer - 1 x red & 1 x black) but at the back of the amp in question it has 4 x...

    Hello i_starlin606,

    The Schneider SPA-9705 is a 4-channel bridgeable amp. How you intend to use it and what speaker(s) or subwoofer(s) you are connecting to it will determine the appropriate hookup.

    If used to drive 4 sets of normal speakers, you would connect your front channels to one set of inputs (usually 1 and 2) and the rear channels to the other set. You would not use the subwoofer outputs coming from the deck.

    If used to drive subwoofer(s), you would need two "Y" adapters with a female input side and 2 male outputs. The cables marked "subwoofer" would be plugged into the female "Y" and the male ends would be plugged into the 4 channel inputs on the amp (paired as 1-2 and 3-4). The front and rear preamp outputs on the deck would not be used.

    Speaker/subwoofer connections will depend of the number of individual speakers or subs, whether they have single or dual voice coils, and the impedances of the voice coils.

    Hope this helps.

    May 06, 2009 | Car Amplifiers

    1 Answer

    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.

    Apr 18, 2008 | Sony XM-754HX Car Audio Amplifier

    1 Answer


    If you've got a standard 4 speaker system (2 front, 2 rear), your best option is to connect both left speakers to the left channel amp output and both right speakers to the right channel amp output. The only thing you lose is the ability to fade the speakers front to back.

    Mar 04, 2008 | Legacy - American II: 2 Channel 1200W...

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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!

    Aug 14, 2007 | Sony XM-2150GSX Car Audio Amplifier

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