The BBC one. Interesting about the 5db difference. That could be contributing to the imbalance perhaps.There are two... BBC?
Although it's not enough to not hear the subwoofer in one channel and not the other.. The BBC does have a 5db difference between the left and right channels.
PS... The 1266 TC has been by far the most challenging headphone HPEQ to capture correctly... I've all been given up on it.
I'm going to try to measure the TCs again tomorrow, but first I'm going to try with the Shang Sr. My ear canals are strangely shaped and it's hard for me to put in the earbuds correctly too. I guess another day of experimenting