Question about Alpine MRP-M1000 Car Audio Amplifier

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Amp is getting good power ground tried swapping rcas over light is coming on no output 2ohm speaker circuit? swapped all wires over to known working leads still no joy? sparky cant repair it as he has no manual. pls help

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Lexdiamonzz
  • 203 Answers

SOURCE: no sound from the amp

Make sure that your amp turn on wire is connected from behind the radio to your amplifier. Usually the turn on wire is a blue wire but it can be any. This blue wire connects from the blue/white wire behind the radio to your small connection turn on connector on the amps power connections. You have 3 ( 12V , Ground, Switch or the smallest connector)

 

Also check the amplifiers fuses, and the main powerline fuse as well. If this doesnt work then write back to me.

Posted on Oct 21, 2007

RAC_ICS
  • 143 Answers

SOURCE: Negative speaker output touched chasis of amp.

check all fuses on the unit, pull them all.
look for a way of resetting the amp.

LEAVE THE MAIN FUSE OUT TILL THE INSTALL IS COMPLETE!!!

that way you wont short a screw driver across the terminals on to the chasis.

Posted on Dec 15, 2007

  • 14 Answers

SOURCE: amp gets power but doesnt send anything through speaker wire

There are several things that could cause this that i know of, bad ground not being one of them.
A bad ground terminal should cause a noticeable distortion in sound and cause the amplifier to turn on and off.
If you are getting power and no sound, the first and easiest thing i would check is your RCA wires. Replace them with known good wires.
If that does not work, are you positive the speakers you have hooked up to your amplifier are not blown?
If available, use a DVOM to check resistances on the coils on your speakers. An open lead reading indicates a blown voice coil.
Also make sure that your speakers are each hooked up to a positive and negative terminal, as some amplifiers have two positives next to each other and two negatives, while others go + - + -.
Your amplifier could also have bad input or outputs, but i would try these other easy fixes before resorting to buying a replacement amplifier.
The only other cause to my knowledge would be bad RCA outputs on your head unit.
If possible try with a head unit you know the outputs work on.

Hopefully one of these suggestions solves your problem.


Posted on Dec 17, 2008

blueextc3221
  • 15935 Answers

SOURCE: amp powers on, no sound from subs

the output is blown. It is in need of service.
There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause.

Posted on Dec 29, 2008

  • 124 Answers

SOURCE: my head unit has 1 set of preamp outputs can i conn. 4 speakers

Yes you can use a y to go to all four. Or you could bridge the four speakers wires onto the two outputs for 1 channel

Posted on Mar 31, 2009

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1 Answer

In my JVC RX 8SD only works a channel. How do I repair this defect?


Start with the simple things.
  • Check left right balance
  • Swap output speakers left to right
  • Swap the speakers at the receiver to make sure no wire open/short
  • Swap input RCA cables left to right red/white - white/red
Ok No JOY!
JVC has thermal overload circuits/overload on most of there Amps.

Remove power for a minute or two to see if there is a reset.

Rewire speaker connections to speaker set 2.

Connect REC out to Rec In swap cables and see if problem is in pre-amp or power amp.

Check internal fuses.

Jan 19, 2016 | JVC Audio Players & Recorders

2 Answers

Let our Experts solve your "My amp lights up like normal then protection light red comes on and turns the amp off resets and tries again. What would be my course of action


disconnect all wires (including RCAs)
reconnect positive, ground, and remote.
Turn amplifier (car) on.
If it goes into protect mode again - there is an internal fault that requires professional repair.
If the amplifier idles as normal - turn off the car. Plug in RCAs & re-try
Failure? - replace RCAs as they may be pinched or faulty.

Lastly if all connections are made and amplifier idles without going into protection - you need to concentrate on your load (subwoofers).
Be sure they are wired properly into a resistance that amplifier is rated.
The lowest impedence that amplifier is rated is 2ohm.
That is possible with (2) 4 ohm subwoofers wired in parallel....
(4) 8 ohm subwoofers wires in parallel...
(1) Quad 1 ohm subwoofer...
or (1) Dual 4 ohm voicecoil subwoofer.

Any other combination will result in an impedence too low for your amplifier.

Next:
Using an OhmMeter (Digital multimeter set to Ohms 20) test each voicecoil against its advertised resistance. It should be CLOSE +/- .5 Ohms.

Any other reading means the voicecoil is blown.


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

May 27, 2009 | Kicker (ZX750.1) Car Audio Amplifier

1 Answer

Lack of power, or bad amp?


Check your ground. Its just as important as the power supply. Take off any paint, good ground means good power, check the fuse on the amp and any connctions to the battery other than that i would exchange it

Feb 10, 2009 | Infinity 475A Car Audio Amplifier

2 Answers

Marathon 2000 amp... PROT light


Ok this means the AMP is in protection mode!..most likely the cause is a short in your wireing from the speaker wires! check all wires going in and out of amp! Look for stray wires touching metal or other contacts! (If this does not fix it the short may be inside of amp!
(This has nothing to do with a fuse!)
Please rate this FREE response!
THANK YOU!

Jan 19, 2009 | Marathon DJ-2000 Amplifier

1 Answer

Amp powers on, no sound from subs


the output is blown. It is in need of service.
There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause.

Dec 28, 2008 | Alpine MRD-M1005 Car Audio Amplifier

1 Answer

Absence of sound


If you have another amp in the vehicle, swap the RCAs and speakers to see if you get sound through the other amp.

Generally, if the red light is on and there is no significant DC on the speaker terminals, the amp is in good working order (for the older Rockford amps).

Jan 15, 2008 | Rockford Fosgate Punch 500a2 Car Audio...

1 Answer

Right side speakers don't work


if you are using RCAs as inputs to your amp.Swap the R to L @ RCAs to see if its comming in okay from radio.If both RCAs have audio then amp is bad ,If amp has any type of switches , move swithces to see if it comes back .Also if both RCAs inputs have audio .Move the RCAs when connected on amp to see if amp has bad connection in board to RCA jacks..If audio comes back on bad side when jack is moves .Then you have bad solder joints on board..If not then you must have bad outputs on amp..

Dec 22, 2007 | Car Audio & Video

1 Answer

No Sound


go to your local car audio stor and buy a rca to speeker wire converter or buy an equalizer and use your speekers

Aug 18, 2007 | Panasonic CQ-VD7001U Car DVD Player

2 Answers

Amplifier does not turn on anymore.


look fix of conection line blak of cabel ithes+

Apr 20, 2007 | Power Acoustik TS980-2 2 Channel 980W...

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