why is my amp cutting out , some help please

Could be heat (does it have plenty of air round it?). Could be a stray speaker wire strand causing a short - check all the speaker connections to make sure the ends are neat. If those fail, could feasibly be a short inside a speaker, which can be a pain to diagnose. Otherwise is most likely an amp problem...

iv'e been told that the power we use from sockets tends to spike....maybe this could cause the cut out?!

Does the red power light flash when it cuts out?

If so - Do you have adequate ventilation around the unit it may be overheating. The red power indicator light will flash at intervals of 2 seconds if this is the case, once the unit has cut out.  

Also check the speaker connections that they are not loose or touching, this will make the red power light flash at half second intervals.

If the light does not flash is the unit loosing power, is the power cable securely plugged in, etc?

thanks for reply. Theres plenty of air around it, it's been in the same position for 2 yrs.I have heard that a speaker problem itself can cause the amp to cut out like you say( i'm hopeing it's not though) it's a tricky one.My rear speakers are connected together with two seperate lenghths of speaker cable, and have been for a while and it's never cut out, could that be the sudden problem i wonder. I hope you understand this next bit. Could it be - on my denon dbp-2012 bluray player i have connected annalog cables to the 2 audio plugs and have sent them to the cd area of my amp for stereo sound for my music, and the hdmi cable is sent to the dvd area of the amps terminals . Could they be clashing in some way

 The red light flashes in half a second intervals or i'd say a second, the amp does'nt seem hot really. It's really strange trying to work out whats actually causing it suddenly

Speaker wire shorting at a guess then. Check speaker connections at all ends and remake the spliced wire to the rears and use insulating tape on them.

Thanks john , earlier i did connect the rear speaker cable again and put tape round them,and it cut out again about 20 mins later,( it cuts out when i've just got my hopes up) it could be the problem i spose but it never made the amp cut out before. It looks like i'll have to pull the amp out and check every coonection. I hate doing that it takes me about 3 hrs

Yes bummer indeed. Don't do it by inspection though, take each wire out and roll fingers round them to tidy up loose threads (if you're using bare wire as opposed to bananas). If you're using factory fitted bananas, you might be in trouble...

What you need are these.

i'm using banana plugs already not factory fitted ones though

At both ends?

Had a glance at the manual and the 1/2 second interval relates to both a speakers problem and unfortunately failure of the amplifier circuit.

Have you checked each speaker cable at both ends - amplifier and speaker?

The speaker short could also be internal in the speaker cabinets

Faults vary, but the last one i mended (different model) had damaged driver transistors and emitter ballast resistors.  Easy job but time consuming.  I have no idea of the topography of your model in the O/P stages.

I also changed the reservoir capacitors as they were showing signs of stress and damage.

Indeed, my Diamond 9.1s had that prob, just hoping to avoid taking them all apart (yet)...

Hi,

My Denon 1909 did this after about a year, unplug everything from the amp and leave it out in the open.

When you have done that, plug the amp back into the mains and switch it on. Leave it on and see if it cuts out again.

Mine did and needed to be sent off to my supplier, when it was returned it had a software uograde as well.