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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
elliottbnewcombjr
5,483 posts
 
check the connections at the speaker ends to be sure
george53 OP
44 posts
 

Yup.  Checked and wiggled.  All clean intact and no corrosion.  Even considered crossover in speaker. Recapped @8 yrs ago.  Still think it would work or not, even after rest period.  Voodoo at this point.  Being retired, I can sit on a little stool in front of the speaker.  It’s like taking the car in for a fix, when it’s running ok.  Just have to wait for repeat performance 

george53 OP
44 posts
 

Yup.  Checked and wiggled.  All clean intact and no corrosion.  Even considered crossover in speaker. Recapped @8 yrs ago.  Still think it would work or not, even after rest period.  Voodoo at this point.  Being retired, I can sit on a little stool in front of the speaker.  It’s like taking the car in for a fix, when it’s running ok.  Just have to wait for repeat performance 

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