I turned on my gear tonight and for some reason the left channel was not putting out the volume that the right channel was. This was while using the CSP2, the Taboo and speakers. I turned the Taboo volume down and put headphones on and the lack of volume in the left was evident there, too. I just basically turned eveything off and waited a few minutes and swapped the input tube on the CSP2, switched the 6N1P-EV's from right to left and vice versa and changed the power tubes on the Taboo. Now it is back to normal. I am wondering if the culprit is that input tube I was using in the CSP2.