Question about Jensen LXA300 Car Audio Amplifier

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Protect always on

I have had this amp for a while now and it has worked great but recently it has gone to the "protect" thing and wont work for a bit. and now it is constantly on this "protect" so doesnt work?

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  • 58 Answers

Replace the fuses.

Posted on Oct 24, 2009

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My nitro bmw 486 cuts out when i turn the volume up alittle bit,subs start crackling and distorting turn volume back down sounds just fine amp doesn't go to protect mode still works 4 guage wire a


Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty D.A thumbs up would be greatly appreciated if this answer is helpful to you. nitro-bmw-486-cuts-out-when-turn-volume-lv2kkrmxrai4iihdvw4m3np2-1-0.jpg

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Blue light on top flashing???not powering subwoofers.. was working fine.( blue light stayed on.) When I noticed it I shut the system down immediatley!!! Have'nt turned sytem back on since. What should I do...


You amp went into protect mode from an abnormal condition. Were you hammering on this amp when that started? I might suggest letting up on it a bit if so. Also check your wiring. Make sure all are insulated well and fully connected. It cut the noise off because if it would have continued it would have blown your amp. Make sure the fuse is good as well. Perhaps it is getting weak. Turn things down and turn the amp on. Give it a chance to cool for a bit first and then turn things down and turn it on. Everything a go? Then turn it up a bit then. My guess is it was getting worked a bit to hard and went into protect mode. Give the amp a rest from time to time. Good luck.

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Red light is on and subs won't play all the wires are connected correctly it all of a sudden just stopped working one day idk y


sounds like the amp is in protection mode. try disconnecting the subs and see it the light changes to green. if it does then the subs are your problem. if the light was allways red while it was working then the subs may be disconnected inside the box or have gone bad. try using a diffrent speaker and connect to the amp.

Feb 06, 2010 | Audiovox Car Audio & Video

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Lanzar 800 watt amp protect mode stays on


protect mode usaully means that something has disrupted the power of feed lines to the subwoofer/speakers possibly fuse is blown in amp or amp is blown in which we hope not. see if you have a warrenty if blown and send back or bring it to where you purchased it from.

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2000 watt american legacy amp protection ligh wont go off


Same thing happened to me so I returned it for repair turns out it was an internal 25amp fuse on the output. Got it back an it sounded very weak now it does not play at all. Nothing wrong with my setup as I have now got an 800watt amp that is running great.

Jul 01, 2009 | Lanzar MXA422 Car Audio Amplifier

1 Answer

TX-DS838 shows protect and then shuts down


yes , Im afraid you have a chip gone , If you open the unit up you'll see a alloy heatsink with 4 to 8 large chips screwed to it , These are the amp drivers , In between these chips you see a smaller one (that is the protect chip),You see when things get a little hot this chip is designed to break sooner that the more expensive main amp chips , In the past ive unsoldered these and still found the amp driver bust too ,dont worry though , maplins or even farnell(cpc) on the web will supply these for less than a tenner..If you wanna test my fix then just unsolder the littlest chip on the main heatsink and it should start to work again but with NO protection(unplug it first before taking it to bits)

Jun 06, 2009 | Onkyo TX-DS838 Receiver

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