One engaging quirk with my now vintage Primaluna Prologue One are the thoroughly old school control knobs. Yeah, perhaps it’s partly due to my humid, tropical locale but both knobs semi-regularly get noisy and glitchy. Sometimes a channel will totally become silent. I fix the problem by setting the amp onto the kitchen table upside down, taking the bottom off of the amp’s case and spraying Deoxit onto the knobs’ contact surfaces. I enthusiastically twist each knob several.times and then re-install the bottom plate. It never fails to cure the amp’s noise and glitchiness. It never fails to improve the amp’s sound quality.
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.