Jayt- Not all glass fiber transceivers are created (or implemented) equal. With certain manufacturers, Goldmund being one of them, the AT&T input is simply amazing. On C-J DAC, it was not! Copper does provide more "tuning" ability because again, not all coax sounds the same. However, with the gear I'm running, glass is the way to go. Just my .02.
Is AT&T a Good digital cable connection ?
Does anybody have experience with AT&T glass digital cables ? Is sit a better connection than coxial ?