Question about Legacy Audio American Legacy II LA690 Car Audio Amplifier

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Amp shutting off going into protection mode

I have a american legacy la690 4c 1000w amp that when i turn on the head unit and turn up to where u can hear the sound the amp kicks off and goes to protection mode. i had the set up in my other car than toke it out for a while never removed any of the wireing when i replaced the amp and subs i started to get this problem. any suggestions on what to do or what could be wrong?

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  • Anonymous Mar 23, 2014

    I'm tryin to figure out hy my 4000 watt American legacy amp will not come out of protect mode I have a new battery great ground and checked all wires??

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Check this out: http://www.techlore.com/article/14696/

Posted on Aug 17, 2006

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I have a 2000 dodge durango there used to be a system in it and now i have put a new head unit in and wired the factory wires back toghether and put them back into the factory amp. when i hook the speaker harness into the amp my cd player is fine then when i hook the other harness in it goes into protect mode?? what do i do

Posted on Feb 12, 2010

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Legacy 1000w 2 channel amp worked awesmoe then just stopped working after a few songs. Didn't turn up too loud. Didn't have the settings too high. still getting power (amp light on, led lights...


Open your speaker box up most likely the jumper from the inside of the box to the subwoofer itsself is broken free, Usally when they have lights around the sub woofers there seperate leads, bet 10-1 you have loose wires inside the speaker box

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Check and see what size fuses it uses. Your watt power means nothing without good fuses. My suggestion would be to go buy 40a fuses and replace the ones you already have.

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I would check the RCA preamp wires connecting the stereo to the amp. If these are loose or broken, it could cause you to lose your sound.

Does the amp show signs of life, such as clicking on, an LED turns on, or anything like that?

Has anything else changed between the time it worked and didn't work?

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Optimum sound performance needed


1) legacy products are highly overrated and i have never seen one put out the power it claims
2) if you are running the amp bridged, you need to match the impedance of the speakers to the amps highest output impedance, otherwise your system will not sound all that great...

what size fuse or fuses does your amp use? what size wire did you install with (power and ground)? did you connect direct to battery or did you connect to a fuse block or similar? did you use a stiffening capacitor? does it sound like it is clipping when you turn it up or is it just distorted? what kind of box are you using for the speakers (ported, vented, sealed, bandpass)?

if you give me the model number of your speakers and your amplifier i can probably help you more, but with the information you have provided, this is all i can offer..

hope it helps,
trin

Nov 11, 2007 | Legacy - American II: 2 Channel 2000W...

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Compatible amp for subs


hi there. yes it should work providing you have the correct wiring it for it, if you buy the LV 416 enquire about a wiring kit to fit, most will. theyre normally around 20pounds. most amps will be compatible with most subs. i run both my 12inch 1000w off one 1200amp at half power, they kick lovely and i have no problems.


any other quiries please ask
adam

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Car audio amp (?) issue


To me, it sounds like your "Output Devices" in the MAIN Amp have gone faulty. BUT check the OUTPUT directly at the Head Unit & then the Amp's terminals to make sure.. if ya dont have any signal comming out of the "Head Unit" than thats ya fault.. however if that has a good signal out,there, then it's gotta be ya Main Amp. Ya can check to se if there is output with a small speaker with wires on it, or my favorite an modified earphone, with the wires ends exposed so ya can "Touch" them to the Output terminals/Plugs etc, of whatever ya wanna test. NB: Only test at a low level output.

Aug 08, 2007 | Legacy Audio American Legacy II LA290 Car...

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No power


Check the unit for any Fuses, Fusable Links etc, if they are OK proceede on to testing, I often troubleshoot these issues via a stereo head set, modify the leads so you can "Touch" them onto the Speakers Output Terminals, connect the "Shields" together, thats "Earth" and the other Two, are Left & Right... with a Sinal feed in & the Amp's volume turned to about 25% volume, connect up the Earth wires to the Chassis with a clip, under a srew etc, just make good contact... then touch the Left & right wires onto the output, ya should hear sound... if not most probably the Output device(s) may have gone faulty.

Aug 03, 2007 | Legacy Audio American Legacy II LA290 Car...

1 Answer

Constant thumping


Theres most likly an open ground printed circuit trace on the Printed circuit board on the bottom. first clue is You said your girlfriend disconncted and blew the fuse. You gonna have to ytake the amp apart and totally disassemble the PCB off the rails and everything unless theres a bottom cover. It may be an obvious burn or could be hidding under the green paint of a trace?? Goos luck

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