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Speaker cutting out intermittently

Primaluna Evo 100 feeding Primaluna Dialogue Premium feeding Klipsch Cornwalls.  After listening for several hours while straightening up the house, I noticed change in volume.  I checked and found left channel silent.  Turned off amp and muted preamp.  After a cool down, I reversed speaker connections on the back of the amp, and powered up.  Everything good.  I gently wiggled them before shut down, with no effect.  Since preamp remained on/muted, I’m ruling that out.  Power tubes are nearly new KT 150’s.  Warning lights for those tubes remain off/good.  Changed sources at beginning of this to rule that out.  So…any thoughts on this?  I’m not a tech guy,,basics only, so any insight is greatly appreciated.  

george53

Showing 1 response by ghdprentice

ghdprentice
6,445 posts
 

If it only happened once I would not give it a second thought. I would not think it caused by tubes… if something happens to them, they don’t tend to work again. 
 

Loose connection most likely. I guess it is possible a tube is not fully seated. When off, with a glove or cotton cloth you might verify the tubes are fully seated. 

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