Question about Cambridge Audio Azur 540A Amplifier

2 Answers

Amp keeps turning itself down - cant turn off 'protection'

My Amp keeps going into 'protection' mode and turning itself down. I have tried different connections and locations. I don't seem to be able to turn the protection off so the amp is unusable

Posted by Paul Davis on

  • Raulsupreme Mar 08, 2008

    Hi i am experiencing the exact same problems with my azur 540A cambridge amplifier. Mine has become completely unusable as it is seemingly 'locked' into a perminent state of protection, this is really frustrating as for two years i've put up with the amp turning itself down constantly...

    This has left me with no choice but to discredit this amplifier, not one i reccomend you buy for any purpose let alone sound production can someone help with this problem anyway? thank you

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2 Answers

Dave Kraus

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Hello. The protection mode you are speaking of, is called DC Protection. It means that either of the amplifiers have DC voltage on the output, which will either turn off the speaker relay, or power supply relay, disabling the unit to protect your system, speakers or amplifiers from further damage.

Dave

Posted on Sep 27, 2012

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Yes,pls.stop plugging the system,you may harm your system if you do so,the system has it's own system analysis mode,and if there's something wrong in the circuitry,it will activate,you need the authorize service center my friend,it's a technical problem.

Posted on Feb 18, 2007

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0helpful
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Protection light came on what cut off

Amp in Protection - Troubleshooting - Basic Car Audio ...

www.bcae1.com/.../troubleshootingbasicsampinprotect.htm
Some simply shut down and the power light will not illuminate when in protect mode. If the power light blinks then goes off, the amp is either going into protect ...

How do I fix my amp it keeps going into protection mode ...

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https://www.youtube.com/watch?v=DQ1bdsm6s2c
Apr 24, 2013 - Uploaded by Nathan West
My MTX 600xd amp light won't even come on. ... Red light comes on. ... one.. and some times it goes into protection... once I turn the car off...
tip

My amp keeps TURNING off and on.

If it just started, you have an equipment or wiring problem. Check the wires first, that's easy. Otherwise, the amp may be bad, check the warranty if its new. Maybe you can get a replacement.

If it's always happened, some cars have an factory amp for the rear factory speakers hidden in the wiring. Sometimes between body panels. If you didn't bypass that, you're more than likely blowing out the new amp with too much power causing it to shut itself down. (protected mode or keep blowing fuses) Could be a blown speaker, bad ground, internal damage, RCA cable problem, the list goes on and on. Find out the preoutput voltage of your headunit and set the gain to what that is and nothing else LEAVE IT THERE, the gain isnt a volume knob for your amp its to get the amp and the radio on the same page (i.e. radios at 50% volume and so is the amp) if you turn it down too low that will make the amp very sensitive to volume adjustments and your amp will be at 100% while the raidos at like 50 or 75% and once you go past the 50 or 75 on the radio the amps going to keep trying to play higher even though its already maxing out which is going to cause it to clip and cause distortion untill it goes into protect mode. Hope this was helpfull to some one
on May 12, 2010 • Car Audio & Video
0helpful
1answer

I have an kenwood 600watt amp and then amp keeps turning off and on when i turn the gain up

1) Pull your speaker wires, grab an ohm meter and confirm that each speaker reads 4-8 ohms nominal impedence.
2) Ohm out your speaker wires to chassis ground & confirm no 0 ohm (short)
3) Confirm 12 volts plus at amp power wire. Low voltage will send amp into protect mode.

If speakers are disconnected and amp turns on, look for a red led. If red then you have an internal problem that is protecting the amp.
If going into protect mode due to internal issue, then it's time for a new amp.
Also, you will need to use a "line out adaptor" in order to covert from speaker out to low level (RCA) input to amp. Too much voltage from head unit can fry the pre-amps in the amp.

And yes, I'm an electronics tech and yes, I know my stuff on car audio:)

Just a side note, never confirm a fuse as good by sight:)
2helpful
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Can anyone help

What size is the amp and how many watts is the speaker(s) you have it ran too? If your speakers are trying to pull too much power from the amp it will turn itself into protect mode to keep from blowing a fuse as well as if you are pushing to many watts into small small speakers it will do the same to protect from blowing the speakers I would recommend turning the settings on the amp down slightly and then trying it out also make sure your wires arnt crossed adjusting the setting as it plays is the easiest way to fix the problem also make sure the bass isn't all the way up on your head unit
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MY AMP TURNS TURNS ON THE PROTECTIVE MODE

The amp is being overworked and is overheating so it is shutting down to protect itself. You could try to add a fan and point it at the amp to help keep it cool. Also make sure the amp is not located where it will get heat from an exhaust pipe under the car for example. They may have external fans that you can attatch to the amp to help cool it. The constant overheating could eventually damage the amplifier.
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Jh202 amp works for a few minutes stops for a few minutes any ideas

Sounds like the amp is going into Protection Mode. Does yours have green LED light then RED LED on it? The green is power and the red is Protection. You will need to either change the OHMS wiring or Put A Fan on it to Keep it Cool Inside.
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Protection mode

try 1 speaker at a time could be blown speaker also try different rcas and inspect positive cable make sure its not grounding out near firewall or pinched somewhere else
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Protection mode?

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. Double check your connections. .A thumbs up would be greatly appreciated if this answer is helpful to you. protection-mode-shonxoarcym4awy4zl1imx4o-2-0.jpg Lanzar
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Amp turns off or goes to protected mode during long low base

Let me take a stab at it There are two types of resistance... Static and dynamic. These resistance change depending on the position of the cone. Now im guessing the short bursts of bass are not small ones. If the cones are forced further than allowed the resistance of the combinded drivers may drop below the rated impediance for the amp...causing the amp to into protection to keep itself from over driving itself (the less reistance a amp sees the more power it will produce, till it essential blows itself up)
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Amplifeir keeps turning off

HI K-****, Adjust your Gain setting to limit just enough so the amp does not go into Protect mode.
  1. Turn your Gain all the way down,
  2. then crank up the bass from your system.
  3. GRadually turn up the gain until you trip on protect.
  4. Turn the gain back a notch and your set for no more protect.
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