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I have an Emotiva UPA-5 amplifier connected to a Marantz SR6005 receiver.


Something weird is going on when I switch sources on the receiver (Say TV to DVD) the amp will fail. The power button goes orange and one of the blue channel lights will flash red. It's pretty random as to which one it is. This also happens sometimes when the receiver changes resolution 480 source to say 1080.


Emotiva said that it was most likely related to the Marantz. I haven't had any luck tracking this down. Any suggestions?
 

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That's an odd one. Try changing the amp inputs to see if the faulty channel stays the same or not. If it does move, take note of which output from the Marantz is possibly causing this, then move that output to yet another amp channel.


If the same amp channel acts up no matter which Marantz output it's connected to, then it could be the amp after all. One other idea is it could be a faulty cable for that channel, though by what you describe this seems unlikely.
 
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