Question about Sony XM-1252GTR Car Audio Amplifier

1 Answer

Red lioght keeps comming on

I have a Sony XM-1252GTR. Everything was fine until one day when it was raining it kicked off. I noticed that the red light protector was on. I checked all my wires. I read the manual and it said to check my speaker wires and ground. I checked all ove them. Disconnected everything and reconnected. I even went and exchanged the amp for the same new one, and it still did the same. I then went and bought new speaker wire and nothing changed. I then thought something was wrong with my speakers. So I went and bought new subwoofers. Nothing changed. Still did the same thing. Red light still on. I'm totally stumped. Could it be my power wire, remote wire or head unit? I don't think it should be so complicated. Can you please help me out here?
Thank you.

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  • nfleming19 Jun 17, 2008

    I have had this amp for about a month and it has worked great up until a few days ago. I got in my car a few mornings ago and it wasnt working, the red light was on. I checked all of the wires, and they were all fine. Later on that day when i got in my car again, everything was working fine. This seems to keep happening, it will work fine one minute and not work the next. It seems to have problems when it is humid outside or it is raining. Could this be a cause to the problem?

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1 Answer

Make sure ohm load is not too low, I think that amp is 2ohms/ch and 4ohms bridged minimum.

Posted on Oct 30, 2007

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SOURCE: Sony XM-1252GTR Amplifier

Can it power the subs? Yes.

Can it make them crank? Well, that all depends on your expectations. That amp/sub combo is going to give each sub about 125W, which isn't much. But if it's what you have, it's better than nothing. You might also consider using only one sub and bridging the amp. This would put about 340W on the one sub, which is much more reasonable.

Posted on Mar 13, 2008

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1 Answer

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Turn up the gain on your amp until you get the amount of bass you want or until the sub starts to distort. If you do this and you are still unhappy with the bass, you will need a bigger amp or better subs.

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When the red protection light comes on wat does that mean?? amp plays for 5 secs and tha stop while red is on, and my cars dome light dims at the same time


If the red light is coming on It mean their is a grounding problem. Also check if the power and ground wire is not cut or broken.

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With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.

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Oct 21, 2008 | Sony XM-1252GTR Car Audio Amplifier

1 Answer

Sub size


The sub you want is ONE single 4 ohm voice coil sub that is no higher than 500 watts in power but more than 350 watts. Your amplifier puts out the most power in the bridged state at 4 ohms so this is why you want a single 4 ohm voice coil sub. Also, you don't want to over or under power a sub so you want your sub to match or come close to your rated value of the amp. Good luck
-Andrew Hawkins

Sep 25, 2008 | Sony XM-1252GTR Car Audio Amplifier

1 Answer

Sony XM-1252GTR Amplifier


Can it power the subs? Yes.

Can it make them crank? Well, that all depends on your expectations. That amp/sub combo is going to give each sub about 125W, which isn't much. But if it's what you have, it's better than nothing. You might also consider using only one sub and bridging the amp. This would put about 340W on the one sub, which is much more reasonable.

Mar 13, 2008 | Sony XM-1252GTR Car Audio Amplifier

1 Answer

Protector light keeps coming on


the reason why this is happining is that your pushing to much power than that amp can handle you need to get a bigger amp so it can withstand the power that you want to push to it also the red light comes on so you dont blow the amp.

Jan 08, 2008 | Sony XM-1252GTR Car Audio Amplifier

1 Answer

Amp keeps kicking off? Power Protector?


as long as your powers and grounds are good(make very sure your ground is ok) then either you have a intermittent short in one of the subs or the amp is getting ready to die lol.. The sony amps are notorious for faulure-the quality is just not there... Is the amp really hot??? the only other thing you coudl try is to ass a fan or two in it or around it and see if that helps it out..

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