Question about MA Audio M1889I Car Audio Amplifier

1 Answer

Amp randomly comes on and off

My amp will play for a couple of days or weeks then randomly shutoff all wires are good no power to amp no leds lit up but power wire has charge changed fuses idk anymore im lost

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,139 Answers
Re: amp randomly comes on and off

You may have an intermittent power problem. You will need a schematic and a multimeter to the the power supply voltages in the amplifier.

Posted on Sep 08, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

My amp just stopped working one day almost new dont known why

DID YOU CHECK YOUR FUSES? Is there anything lighting up on it to see if it is in fact turning on? If it's lighting up and there is no protection lights lit up then check your speakers to make sure you didn't burn them up. If there is a protect LED lit then unhook your speakers and see if it stays lit or not. If it stays lit then check to make sure you're getting enough voltage at the amp connection, minimum of 11.0 volts is required just to get it to turn on. If it has under voltage and over voltage protection LEDs see if they're lit. If you do all of these things and are getting enogh voltage, your speakers are not burnt, your protection LEDs are lit no matter what then you need warranty repair that amp. If your speaker wires are shorted it will make your amp shut down also, but since you were using it for a day or so my bet is that you burnt up one of your speaker voice coils and it's internally shorted and that will cause your amp to shut down in protect mode. Otherwise you probably internally fried your amp by too low of voltage or not enough current (amperage) due to not large enough conductor (too small gauge wire) should be minimum of 8 Ga. for each amp, 2 amps will require 4 Ga, 3 or more will need 2 Ga, or 0 Ga. wiring to keep the voltage and current flow high enough to keep from damaging the amps. Good Luck!

Aug 20, 2013 | Phoenix Gold RSd1200.1 Car Amp

1 Answer

My fosgate amp was workin an now it wont trun on can u help me out plzzzzz.....thanx for ur time...

First check your fuses, all fuses. Then check to see if it's getting voltage to it, look to see if any of the LEDs are lit up, power, protection (over /under voltage, overload (short)) or none. If the power LED is lit & no others then check your RCAs coming into the amp by replacing them or using a multimeter set to ohms to make sure they are not loosing a connection due to wire breakage inside the casing. Cheap RCA's will easily disconnect inside the plug just from twisting them. If they are good and are not disconnected from the head unit, then check your speakers for damaged coils or loose wires, who knows they may have fallen off? If your amp has more than just power LED lit then you may have a short in your speakers or wiring disconnect the wires to see if the protection LED goes away. if not and it's still lit then repair the amp. If there are no LEDs lit at all, check your remote turn on wire from your head unit to make sure it sends out a 12 volt signal to the amp. You can also jumper a wire from the 12v battery connection over to the remote turn on connection to see if it will power up. If not then check power wires and connections, fuses, Battery , alternator, voltage regulator, etc.. any thing that has to do with your cars electrical system may have fried from the current draw by your amp.

Aug 20, 2013 | Rockford Fosgate Punch 400a4 Car Audio...

1 Answer

My calibra amp lit the red power led (to show protection )now my subwoofer won't play

disconnect sub woofer , amp may reset and light will be steady , if so replace wireing to sub and sub its bad

Oct 06, 2009 | Car Amplifiers

1 Answer

Led light turns red and the turns off but the amp

In Car Amplifiers have 3 main power wires:
Live +12v (Fused wire direct from the + side of the cars battery)

Ground (Direct to car earthing point (anywhere cleaned of paint for good connection)(I tend to use boot lock)

Remote (This wire should be connected with the switched live wire coming from the back of the stereo, this is Only live when the cars ignition is on)(there should be 2 power wires coming from the stereo usually red live +12v and yellow switched live, depending on the cars original wiring, try moving the remote wire from where you have it, to the other live wire

Hope this is of some help

Aug 08, 2009 | Nitro BMW-482 Car Audio Amplifier

1 Answer

JBL Amp P80.2 - Random output failure

i had an amp that did that for a while before frying. its possible that it could be overheating causing it to go into protection mode which can be fixed with a cooling fan or remounting it somewhere else so it can get some air. it needs to be mounted in a way that it will have at least 1/2" clearance under it so it can have plenty of airflow. the other thing is you may be putting too much of a load on the amp causing it to go to protection mode. check and see how u have the sub wired and if the amp is stable. if u have the sub wired at 2ohm for more power output and the amp is only stable at 4ohm, then the amp will overload and cause the problem your experiencing. thats what happened to my amp. i had it wired for more than it was stable for and it fried

Jun 04, 2009 | JBL P80.2 Car Audio Amplifier

1 Answer

KAC-9152D random shut off

Hello, The problem your having is in the power supply section. If you want it repaired I will repair it for you. I own my own business. I install car audio/video systems in cars, trucks,etc. I also do amplifire repair. I am the cheapest repair business you will find. If your interested send me an e-mail at if you have'nt allready had it fixed. I'll repair it for $40 you pay shipping. I have a website if you wanna check out but it's not even close to being finished. I got rid of my old page and server and I'm just trying different backgrounds and layouts. I'm just upgrading everything cause we are moving to a bigger facility. Again let me know. Good luck

Apr 05, 2009 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

My sub flickers on and off in my truck!!!

could be a number of things loose wires bad ground fuse on its way out or internal problems

Feb 13, 2009 | Profile BAJA HA700M Car Audio Amplifier

3 Answers

Power protector light on sony xplode 1000 watt amp

a green light is the power indicator, a red light is when the protector is in affect

May 30, 2008 | Sony Xplod XM-554ZR Car Audio Amplifier

3 Answers

My amp is on but the protection light stay's on!!

Disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If the protect light remains on, the amp likely has blown output transistors.

Feb 28, 2008 | AudioBahn A2801Q Car Audio Amplifier

3 Answers

Red LED "Protection Light is on" What is the problem

The red light means the amp is in protection mode. A few things can cause protection mode..... First disconnect the subs completely from the amp, and turn it on, if it powers up you have blown subs. Also try checking the main power wire at the battery...sometimes the current your meter is seeing is backfeeding from the remote wire, so your main power line could be blown at the fuse under the hood. hope this helps

Jul 17, 2007 | Crunch BlackMaxx BMX2250 2 Ch 1000W Amp...

Not finding what you are looking for?
MA Audio M1889I Car Audio Amplifier Logo

Related Topics:

82 people viewed this question

Ask a Question

Usually answered in minutes!

Top MA Audio Car Amplifiers Experts

Robert Rankin

Level 2 Expert

338 Answers

Ronald Prier

Level 1 Expert

25 Answers

sonic boom...
sonic boom...

Level 3 Expert

1557 Answers

Are you a MA Audio Car Amplifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides