The best digital audio out of coaxial, or optical?

TosLink is a low cost optical interface promoted by mass market audio manufacturers as an alternative to coaxial connection. TosLink is trademarked by Toshiba corp. and it is more properly name "EIAJ" (Electronics Industries Association of Japan). Best thing since sliced bread ?????
WOW !!!!! Enough said.

Tubes or SS? Digital or Analog? Silver or Copper? Optical or Coaxial? Toslink or AT&T optical?

As with all things in audio, there is no one right answer for all people, just a myriad of different opinions. You could listen to both, form your own opinion, then give your "professional" advice to your customers......just a thought.

Cheers,
John

Avoid plastic Toslink, glass based Toslink is far preferrable. Coax is good as is AES/EBU, but only if both are properly impedance matched.

It's got to be optical, as long as the ends (glass) are clean -- nothing affects it's transmission except for a macro bend.

I have seen several manufacturers list Toslink as the least desirable of the outputs or inputs they offer on their equipment. They must feel compelled to offer it for compatibility with other equipment. I have never seen any company recommend it as the first choice.