Lower gain in left channel.

Thought I'd pass this along -- just spoke to the distributor of my amp. While speaking to him I realized one other variable in this problem. The power tubes (2 pairs of 6C33C-B) in my amp are not a matching quad. This could potentially be a problem. My distributor suggested, instead of buying matching tubes now (expensive proposition) I should try an bias one channel slightly higher than the other to see what the impact is. I will try this next when I get home from work. I'll keep you posted...

I'm having a similar problem with my 'phones. Both channels operate, but right is clearly "louder" than left. They are HD600s, run off of the tape out of my pre to a Headroom Home. Same problem from both headphone jacks, problem remains the same when input cables to Headroom are swapped, so I'm guessing its the headphone amp. I'll call Headroom tomorrow, but I have noticed a similar (but to a lesser degree) problem with my overall system. Could it be the CDP (CAL CL-10)? Hard to imagine that could be the case, but maybe I'll try swapping the outputs from the DAC, or running the analog output from the CL-10 internal dacs direct to the pre. Maybe its due to coriolis force; anyone down under have reverse problem?;>).

Update - just wanted to report that ALL IS WELL once again...the loss of right gain is NO LONGER. It might have been a "newbee" problem. I've only had 1.5 year of experience with my tube amp (first tube gear). Upto now I've only been resetting the bias but not the "offset". The owners manual (4 photocopied pages in all) does not discuss bias or offset at all - very odd. Must be a language problem, the amp is made in Italy or I did not receive all documents from the dealer. All I can say is, after resetting the bias and the offset, the sound appears to be completely in balanced. I'm a happy camper! Best of luck to you all...