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I have a Mackie M2600 FR series amp. Channel 2 goes into protect mode after power up and without a load. No other leds come on. Just the protect led.

I took some meter readings were my speakers connect to. I am getting low resistance. .03 ohms to be exact. Again those are the readings with out any speakers connected. I do have a basic understanding of electronics and I have the schematics to this amp.

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SOURCE: Thumping speakers - no power light is on - wired correctly

the amp is going into protect mode due to something wrong in the amp or some thing in the wiring to it ooh yea if you are getting 18v power to the amp that is way to high it should not be higher then 15v if the amp is in protect mode it will not play at all.

Posted on Nov 02, 2008

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SOURCE: Amp Power light will not go on. Protection light is lit- Thump sound in speakers

It probably has shorted output transistors. To eliminate other possible causes, read through the following page.

Amplifier in Protect Mode - Troubleshooting

Let me know if you have any other questions.

Posted on Nov 02, 2008

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SOURCE: new Dual XIA3145 2/1 LED glows red, guide claims speaker problem

look at these and only these... power or ground...either your power wire has grounded out somewhere (ud be surprised) or youdont have a good enough ground....i would check the ground first....hopefully this helps

Posted on Jan 27, 2009

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SOURCE: how to connect HDD LED & POWER LED & RESET

don't you have the book for the motherbd? Most motherboards tell you right on them wat connection goes where. look for them they should be in close vicinity of each other Usually.... HDD-Harddrive connection./.RST - Reset /pwr-- to switch ....etc....

Posted on Oct 17, 2009

mbostermeyer
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SOURCE: AMp does not display any LED read out

Amps have a part inside that is made to keep the channels equal. The problem is that when there is nothing hooked up to the second channel, then this goes bad and goes into protect. It is really hard on an amp to use just one channel.

Posted on Oct 24, 2009

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I wanna supplied my Amplifier Lanzar MNX 250 with an 12V - 30 Ohm battery, but the led of my amplifier is red and my speaker doesn't play music. How can I fix the "protect mode" in which the...


  1. The battery is 12 volts and Ohms has nothing to do with your amp installation.
  2. Was the amp running and got hot? Many times an amp will go into "thermal mode" when used for an extended amount of time and need to cool down but I assume if you are trying to hook it up you were not using it.
  3. You need to check the ground wire real well. A loose ground will cause protect mode.
  4. Recheck the speaker wires and their connections. If they cross this to can cause protection mode.
  5. This is a 4 Ohm amp, are your speakers 4 ohm or lower> If not then you may be running to low of a load to your amplifier.
  6. I always remove everything from the amp first and power it on and then add wires and see where which connection throws the amp into power mode.
  7. Check the fuse as well but if the LED is on chances are your fuse is good.
  8. If you check all of the items I listed and the amp still goes into protect mode then your amp is bad.

Regards, Tony

May 05, 2011 | Lanzar MNX250 2Channel Car Amp

2 Answers

TH-15A won't make sound. Comes on, then flashing front light


This probably means there is a failure and the internal protection circuits have activated. It will probably have to go to a shop for repair.

Jan 03, 2011 | Mackie ProFX8 / TH-15A PA Package

1 Answer

AMp does not display any LED read out


Amps have a part inside that is made to keep the channels equal. The problem is that when there is nothing hooked up to the second channel, then this goes bad and goes into protect. It is really hard on an amp to use just one channel.

Sep 26, 2009 | Bob Mackie Mackie M-1400i Power Amplifier...

1 Answer

Power acoustik gothic OV2 800 manual


Could not get a manual for you but did get the follwing specs. Hope they help.

Power Acoustik Ov2-800 2-Channel Class A/B Gothic Series Amplifier (800-Watt)
POWER ACOUSTIK OV2-800 2-CHANNEL CLASS A/B GOTHIC SERIES AMPLIFIER

800-WATT 2-CHANNEL
4 ohm RMS: 150W X 2
2 ohm RMS: 180W X 2
Bridged mode MONO RMS: 360W
BRIDGED MAX: 800W
FULL MOSFET POWER SUPPLY
PWM CIRCUITRY
FULL SELECTABLE CROSSOVER
3-WAY PROTECTION CIRCUIT
TRI-MODE CAPABLE
VARIABLE LOW PASS 40 HZ - 120 HZ
VARIABLE HIGH PASS 150 HZ - 1.5 KHZ
VARIABLE 18 DB BASS BOOST @ 40 HZ
FREQ RESP: 10 HZ TO 30 KHZ
S/N RATIO: 98 DB
THD: 0.02%
2 ohm STABLE STEREO
SYSTEM DISTRESS INDICATOR
HIGH/LOW LEVEL INPUTS WITH FLOATING GROUND
4-GAUGE POWER/GROUND CONNECTION
PLATINUM RCA CONNECTORS
LINE OUTPUT WITH FLOATING GROUND

BLUE LED
CHROME TOP PLATE PANEL 2-CHANNEL CLASS A/B GOTHIC SERIES AMPLIFIER (800-WATT)

Aug 18, 2009 | Power Acoustik GOTHIC OV2-800 Car Audio...

1 Answer

Mxa422 protection


Outputs are fried. Try disconnecting your speakers and see if it still goes into protection mode. If it does then you A thumbs up would be greatly appreciated if answer is helpful for your question. THANK you and GOD BLESS

May 24, 2009 | Lanzar MXA422 Car Audio Amplifier

1 Answer

Amplifier doesn't power-up


3 possible reasons you amplifier is trying to protect itself.

* Ground sensed on Positive terminal - could be shorted wire, stray wire strands from terminals, blown voicecoil on speaker - speaker wire touching ground.

* Thermal/impedence shutdown - Amplifier load is below rated minimum, amplifier has been overworked and is too hot (mostly due to improper load or gain setting too high.

*Internal Problem - Output channel or IC blown... causing an internal fault.

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

May 18, 2009 | Blaupunkt GTA 260 2 Channel Amplifier 400...

1 Answer

New Dual XIA3145 2/1 LED glows red, guide claims speaker problem


look at these and only these... power or ground...either your power wire has grounded out somewhere (ud be surprised) or youdont have a good enough ground....i would check the ground first....hopefully this helps

Jan 27, 2009 | Dual (DBXPA6100) Car Audio Amplifier

1 Answer

Amp quit putting out sound


It is probably in the "protect" mode. When this happens, the amp will have power going to it and seem to be turned on, but no sound. Many amplifiers have a LED that is normally red and it lights up when in the protect mode. Check all the LED's on the amp and see if one of them is for the protect mode.

When an amplifier goes into protect there are usually only 2 reasons for it.

1. A bad speaker

2. A channel blown inside the amp.

Disconnect the speakers to the amplifier and see if it makes the amp come out of protect mode. If the amp has an LED to indicate when it is in the protect mode, this LED will shut off, and sometimes they have a relay inside the amp that you will hear click. If you hear the click sound form inside the amp after you disconnect the speakers, you probably have a bad speaker. Take yours to a service center and ask them to check them for you, many shops will do this for free, I know that my shop will do it for free, so I assume that many others will also.

If the amplifier has a blown channel, you need it serviced. There is no quick fix for a blown channel. If you have a multimeter I can tell you how to check some of the components inside to verify if it has a blown channel. Let me know if you are able to do this and I will give you instructions on how to properly test the components. If you do not have a multimeter, there is really no way to figure out what components are bad. Your only choice would be to take it to a service center for repair. They can give you an estimate of what it may cost before you are committed to paying for a repair. Most car amplifiers will cost about $100 to $150 to repair a blown channel. It just depends on how much damage there is, and the rates of the service center.

I hope this is helpful, and if so a good rating would be appreciated. If you need to communicate more with me to determain what the problem is, please wait to give a rating until we are finished. That way I will not get an undeserved bad rating. By the way, the only rating that is good (meaning that it doesn't lower my over-all rating) is a FixYa! rating. The "Helpful" and lower just bring my rating down. After all, the only reason for offering this free help, is to get a good rating.

Dave

Nov 18, 2008 | Jl Audio 500/5 Car Audio Amplifier

1 Answer

Red status Light


If the protection LED is lit, the amp is in protect mode and probably has shorted output transistors. To eliminate other possible causes, read through the following page:

Amp in Protect Mode - Trubleshooting

Let me know if you have any other questions.

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Question on BB2125 2 Channel Amp


Hi jgoudie

It is a signal sensing turn on unit, so will not turn on until you have supplied signal to it. Plug it into a signal source and see what it does. But unfortunately, in my experience the protection light coming on means there is a fault in the amp.

You can download the user manual for the amp from here. Click downloads in the middle of the page:)

regards
robotek

Aug 17, 2008 | SpeakerCraft BB2125 2-Channel Amplifier

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