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Amp says protect and wont come on - Infinity Reference 1211a Car Audio Amplifier

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[1] the speakers might have a shorting [2] either of the amp channel is having aproblem

Posted on Feb 03, 2011

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I have a ma audio hk-602sx and my protect light wont go off and somthing is clicking inside and as it clicks the protect light blinks.


Disconnect the speakers and then try it again...there may be a shorted speaker or wire if the amp comes out of protect after you disconnect the wires...if the amp stays in protect after you disconnect the wires then there is a problem inside the amp with the circuitry and it will need to get serviced by an electronic tech

Jan 23, 2011 | MA Audio HK602SX Car Audio Amplifier

2 Answers

Protection light on my amp wont go off


you have a shorted power wire and, the amp is protecting it's self,

Jul 15, 2010 | Soundstorm STA135 Car Amp

1 Answer

Red protection light wont turn 2 green no matter what so the amp wont work


Hello mcis43fan,

The protection circuit can be activated by shorted or grounded wiring or it can be caused by a defect in the amp itself.

First, disconnect all wires except power, ground and the remote turn-on lead and see if the amp powers up normally. If it still goes into protection, the amp is defective, most likely shorted outputs and needs repair or replacement. If the amp powers up normally, test the other wiring for shorts and grounds. You can reconnect them one at a time to determine which one is causing the problem.

Hope this helps.

Aug 06, 2009 | Sony Xplod XM-1652Z Car Audio Amplifier

1 Answer

My amp


Check your speakers with an ohm meter. They should have some resistance but not totally shorted. Its prob the amp that got fried. Connect the amp to the battery with no speakers attached to it if the protection light still comes on then the amp is blown.

If the amp is blown you can send it to people on ebay and get it fixed pretty cheap. Good luck!

Aug 18, 2008 | JBL GTO75.4 Car Audio Amplifier

1 Answer

Audiobahn A8002T


The most common cause for an amp to go into protection is shorted output transistors. To eliminate other possible causes, read through the following page.

Troubleshooting - Amp in Protection

Let me know if you have any other questions.

Jul 23, 2008 | AudioBahn A8002T Car Audio Amplifier

1 Answer

Problem with azur 640a amp


protection mode activated to protect your amp from a problem.
please disconnect all your speaker from the amp and check if it is fine start to connect your speaker one by one until you find the bad one which make the problem-change its cable first and then speaker itself.if the problem still you will have a problem in amp.

Jul 08, 2008 | Cambridge Audio Azur 640A Amplifier

1 Answer

Hi i am matt


If the protection LED lights only after the remote voltage is applied (head unit is switched on), the amplifier likely has shorted output transistors. If the protection LED remains lit without remote voltage applied, the amp may have other problems.

Does the protection LED light with no speaker wires connected to the amp and no RCAs plugged into the amp?

Jun 22, 2008 | Car Audio & Video

2 Answers

My amp wont go past protect mode


Disconnect all speaker wires and signal cables from the amp. If it powers up (no protect light), the wiring needs to be checked. If it still shuts down (goes into protect), the amp likely has blown output transistors.

Dec 01, 2006 | Lanzar Vibe 218 Car Audio Amplifier

2 Answers

My amp wont put out sound


it's blown....probably, check your connections and make sure your presenting it an ohm load it can handle....so check the sub with a dmm.

Feb 28, 2006 | Jensen A600HLX Car Audio Amplifier

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