Question about Sony Xplod 1100 Watt Max 10" Subwoofer, XS-L100P5W Car Speaker

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Amplifier why do my amplifier protection light come on

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The light comes for one of two reasons:

  1. to much juice is being pulled from the amp and it is over heating
  2. a wire is getting crossed and sending a signal back to the amp and it shuts down.

Posted on Dec 21, 2008

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I have a red light right next to my ground remote and power wire Connecters and it comes on red and then turns off what's my problem


Ok, need more information, but I will tell you what I am assuming. I assume you are talking about an amplifier. Does it work after the light goes off? If not, It sounds like your amplifer is either going into protection, or that your amplifier is malfunctioning.

If your amplifer is going into protection, you need to check wiring. Most amplifiers go into protection if they sense an amperage anomoly (ie. fluctuating high and low, or overload). This would be a good thing because it's protecting your amp. But it's also frustrating, because now you have to find the problem. If your issue is wiring, I recommend starting from scratch. It's a pain, but will save you the frustration of checking every little thing and there a lot of things to do with the wiring. Always use a multimeter when checking for good ground placement. This tends to be a leading problem with amps shutting down. Also, inadequate guage wiring can also be an issue. Happy Hunting.

Aug 11, 2011 | Car Audio & Video

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No bass and power protectecter light stay on green with a sound


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.

Jul 25, 2011 | Car Audio & Video

1 Answer

Kenwood kdc-148 is in protect mode why?


A car audio component like an amplifier (or in this case a headunit) is most likely to go into protection mode when there is a short in one of the speaker outputs-- in other words, if the + and - ends of one of the speaker leads are touching, this can cause damage to the internal amplifier of the unit. Some units will respond by putting the amplifier into "protection" mode, so that it does not damage itself. Check connections on the back of your unit, or take it back to the shop that installed it.

Mar 04, 2011 | Kenwood Car Audio & Video

1 Answer

Its on protect mode how do i take it off?


Generally if your amplifier goes into protect, you have a bad ground.
Unhook your power wire from the battery and trace your ground wire to the chassis of the vehicle. Strip the paint from the ground location, Put the ground wire back on the grounding location. Tighten the ground wire down securely with no play and hook back up your power wire.

Other cases revolve around the RCA cables.

Unplug the RCA's and see if the protect light goes off.
Plug one in and see if the protect light comes on and then the other.
If the protect light comes on, you have bad patch cables. Replace them and see if your issue is resolved.

If the amplifier was shorted, the system board made have been damaged.

Jul 28, 2010 | Car Audio & Video

1 Answer

I hooked up 2channel 500 watt amplifer and 1200 watt 300 rms subwoofer now the protection light comes on when i turn up volume


your speakers rating is too low for your amplifier. 300 watts RMS means the speaker can operate on an average of 300 Watts continuously. the 1200 watt rating is peak wattage input and meant for intermittent intervals only, a like a bass drum beat count. also , your speaker impedance must match your amplifier impedance or the speaker must be a higher impedance than the amplifier. Never lower than the amplifier's impedance output rating. If The amplifier is rated into an 8 ohm load, your speaker must be 8 ohms or higher. in other words you cannot use a 4 ohm speaker or you will damage the amplifier .

Mar 14, 2010 | Car Audio & Video

1 Answer

Subs will pound then suddenly stop, when you turn the ignition back they will sometimes start to pound.


What you must do is check the amplifier when they stop playing.

Check wether the amplifier is not in protection.

If it is feel how hot the amplifier is. You may have the subs wired incorrectly to the amplifier.

Check the thickness of your power cabling. If it is not thick enough then the amplifier will also go into protection.

IYou can also try disconnecting 1 of the woofers to see if maybe you dont have a faulty sub.

Nov 07, 2009 | Dual Car Audio & Video

1 Answer

Protection light lights up for a second and turns off and the amp seems like it is not working. It is connected and wired correctly.


disconnect the speakers from the amplifer, and turn the system on again. if the protection light still is active even without the speakers hooked to it, then it is most likely that you have a blown transistor in either the power supply section, or the output section.

Either way, your amplifier will need to be serviced.

Dec 07, 2008 | Kicker Car Audio & Video

1 Answer

Got a red light on amplifire how do you reset amp


There is no reset for most car amplifiers, if you are not getting sound and the red light is a protection indicator then your amp most likely has a blown channel and must be serviced by somebody who knows how to fix your type of amplifier. Some Kenwood amplifiers do have a reset for them since they have a microprocessor in them which is very rare for a car amplifier. Even with the Kenwood amplifiers that have a reset, it is unlikely that it would make your amplifier work again if the protection light is on. Since you gave no information about your amplifier except that the red light was on, I can not give you any additional help. I have been repairing car amplifiers for over 18 years and can assure you that you have an internal problem that will require the replacements of some parts.

Feel free to post any further questions you may have, but please list the make and model number of your amplifier. It would help a lot since not all amplifiers will have the same problems even with the same symptoms. Some types of amplifiers will have certain common failures that others do not.

Sep 20, 2008 | Car Audio & Video

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