Help! My system is very bright it hurts my ear

I would start by connecting each amp full range to the speakers.  It could be the room but temporarilly eliminating the bi-amp config is where I would start.   I've used 6l6gc tubes and they never seemed bright, they are well balanced so I' d be suprised if that's the problem.

How does it sound with other sources?  Do you have a BluRay player you can use to troubleshoot?   

I have a tough room,  10' high tin ceiling, 6' windows, hardwood floor.... an area rug, and curtains went a long way to tame things.  A Velodyne sms 1subwoofer eq/crossover really was the trick to eliminate the boom around 40hz.   

Good luck

Wow, new to audio.....you jumped in with both feet. Good knowledge of tubes...

Some after market cable...but I also try my brothers Tara lab..but no luck

I have tried just used one amp at a time but still bright...oh, I just purchased a paired of psvane ct181 to replace 6922 to golden tube...but still no luck...have probably 50 hrs...is very nice on everything except the bright

I have a big glass table top behind my where I sat about a feet away...could that cause the issueissue