The glass cable was developed by AT&T for telecommunications, it transmits the signal down glass fibers and has a locking bayonet connector. I have found it to be an excellent cable in my system. I have a coaxial(RCA), TosLink, AES/EBU and glass connections from my transport and use the glass. I have a PS Audio glass cable.Many of the current transports and cd players don't have an AT&T ouput so it is harder find one on the used market, but when you do they are usually cheaper than the other digital cable. Since they are not that expensive(usually found used for 100.00 or less) you can try one in your system and compare.Good luck.
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