Question about Alpine MRP-F450 75W x 4 Car Amplifier Car Audio Amplifier

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My alpine amp would cut out from time to time, now it wont turn on at all. Not getting light on top either. please help

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The transistor that mount to the amps body (heat sink) inside. most common issue with these.

Posted on Feb 04, 2010

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1 Answer

Subs cut in and out


The amplifier may be going into protect mode (even briefly) because you are driving them too hard. Back off on the volume and see whether the problem goes away.

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I'm using alpine PDX5. using 5diffrernt input and getting 5 outputs after some times amp cut off and red light on in the amp.is any idea why is happning?


Check your ground wire first, #1 issue i've seen over and over... attached to bare metal with a bolt to tighten it down. do not use a seatbelt bolt... as this could cause a safety concern. next, try eliminating one channel at a time to locate a bad cable or even a bad speaker...good luck.

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Alpine mrv-f345 cuts off when...


Yes sounds like your not getting enuff power from the battery could be your alternator you should have it tested. Also have you try'd a capacitor? I put one in my car and it stopped cutting out...

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Subwoofer Turns Off when volume is turned up


check your earth from the amp i had same prob and the vibration broke earth connection once secured it was fine

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1 Answer

Subs cut out at low volume no matter the settings


I'm not a complete audio expert but it sounds like somethings over heating or you have a blown out put bridge.

Jun 20, 2009 | Alpine Type-R SWR-1222D Car Subwoofer

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Speakers cut out when i turn up volume.


check your ground if its not grounded good your amp will power down!

Jun 05, 2009 | Pyramid 4 X 10 SPEAKERS Car Speaker

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Car amp wont turn on


I'll assume that you've checked the amplifier's on-board fuses.

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.

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Amp light flickering


do you have a capacitor its like an extra battery, if you turn the volume way up with cvr's pullin big power, it cuts out because theres not a steady flow of power.... hope this helps

Jun 30, 2008 | Alpine MRP-M450 Car Audio Amplifier

3 Answers

Bump


What do you mean it will bump, then cuts out?, Then you say it just wont't bump? Does it cut out after you go over a bump in the road, does the speaker bottom out and cuts out? Please you need to be a little bit clearer with the fault. and the symptoms.

May 28, 2008 | Alpine Type-R SWR-1222D Car Subwoofer

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