If your tube sockets are marked left and right you could swap the tubes. When you listen again if the low power sound moves to the right, it would be your tubes. Also check connections. I guess I would swap left and right speaker cables to further check these circuits in the same way. Good luck.
Lower power on left channel
Hi all,
Does anyone have any ideas or come across this before?
I have a Primaluna Evo 300 pre-amp with a Primaluna Evo 400 power amp, using G/L KT 88 tubes. The other evening I was sat there playing some music and suddenly thought that it did not sound right, as I stood up and walked towards the centre of my speakers I noticed the the left speaker was down on volume compared to the right speaker. As I went to turn the system off I noticed that the KT88 tubes where down on heat to what they normally are.
I can not do much now till after Christmas but any help would be much appreciated
Merry Christmas
Steve.