Question about Cambridge Audio Azur 640A Amplifier

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Probvlam with my cambridge audio 640 a cutting out

When i play any music at quite high volume it plashes 3 red dots and cuts out, the amp is hot but its not the warning for overheating. I originaly thought it was a problem with my amp but this is the second amp after getting the first one replaced. Could it be a problem with my speakers. They are correct power and ohms. Thanks K

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  • 319 Answers

Check operations manual for indications as you described. Amps MUST have adequate ventilation. Make sure unit is not in small, semi- closed space or on top of other warm equipment. Check for speaker impedences match that of amp

Posted on May 30, 2008

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1 Answer

Running four S70 Siroccos off the amp, everytime volume gets halfway the protection is cutting in with protection light flashing three times? When reducing down to two speakers amp cuts out three quarters...


You are overloading your amp. IMO 640A cannot handle heavy loads.

Better change the speaker combo and connect something that puts right load on the 640A. Else, get a meaty amp from CA.

Mar 04, 2011 | Cambridge Audio Azur 640A Amplifier

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Just set up my brand new cambridge audio azur 650a amplifier. It keeps cutting out with the protection light blinking three times indicating "overvoltage" according to the manual. I'm using it at...


Just make certain that the connections are all good with no wires touching. If it still doesn't perform after that return it to where you bought it and get a new replacement or your money back.

Feb 16, 2011 | Cambridge Audio Azur 650a 2Channel...

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About a month ago while on a gig, I noticed that the amp was cutting out when I played solos at a high volume. I play at barely half volume now, and if I go any louder, the same thing happens, it cuts...


Not likely preamp tubes. If they cut out they would fade slowly then come back slowly...

First check for marginal input jack. These take a beating and get loose and poor contacts. The vibration can cause the contact to be lost.

Also volume controls can get marginal...

Try to catch it in the act and tweek things to find someting that is affected.

Another common problem is contacts on jacks meant for effects inserting. These pass the signal through switch contacts when nothing plugged in and those contacts are "junky" to say the least.

Mar 08, 2010 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

The left channel in my Cambridge Azur 640 amplifier keeps cutting out. Wierdly I can often 'shock' it back to life by quickly turning up the volume a lot. Any ideas?


have the volume control cleaned by a spray of electronic contact cleaner. If the carbon coating material is already wiped-out due to use, have the part replaced

Aug 03, 2009 | Cambridge Audio Azur 640A Amplifier

1 Answer

Cambridge 640 amp, levels coming out r and l are different


Adjust "Balance" to center. If at center, something more serious in amp.
Paul

Jun 07, 2009 | Cambridge Audio Azur 640A Amplifier

1 Answer

Noise


That is a factory defect problem,i encountered like your problem before,it is a brand new also there is a hizzing sound a like.I told him send it from it you bought, then the problem is solve...

hope may this help;

Jul 18, 2008 | Cambridge Audio Azur 640P Amplifier

1 Answer

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use sonic slide switch and make ground connection between your 640p and turntable.-check cables and test with another good cables.-shut down any light dimmer around you and test.

Jun 29, 2008 | Cambridge Audio Azur 640P Amplifier

1 Answer

Protection mode overuse


Flashing protection LED indicates there is problem with circuit. Have unit serviced

May 10, 2008 | Cambridge Audio Azur 640A Amplifier

1 Answer

Amp doesnt work


If you've only had it for 3 weeks and it's under warranty, you need to send it to a warranty station.
If there is no warranty and you want to try to find/repair the problem yourself, let me know.

Oct 23, 2007 | Alpine PDX-4.100 Car Audio Amplifier

1 Answer

My amp


Yup, looks like someone who does not understand the quality of a Cambridge amp connected it wrongly, or with mismatched components. Since you state that the Amp was very hot,It suggests that the Speakers hooked to the Amp were of a Higher Rating than what the Amp could Handle. That it worked for about an hour is credit to your machine. In all likely hood. 1. The Power supply fuses are blown, and 2. The Audio Aoutput Transistors also. can be fixed, but very expensive job, and only in the hands of the right Technician.

Aug 13, 2007 | Cambridge Audio Azur 640A Amplifier

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