I own a $7000 SACD player I can also use as a DAC. I use Toslink and SPDIF coax. The difference is SO TINY IT most likely is the actual spinner. I actually use the Toslink 98% of the time, as it is more convenient. IT sounds GREAT. (PS the Toslink from Lifatec actually DOES sound better than Medical Glass)
Just because some folks decided with the stuff THEY had, that THEIR SPDIF Coax was better than THEIR Toslink, does not make it actually true.
A Toslink of 15 ft is not gonna be a problem.
(The Lifatec sheath is very flimsy. I covered my 15 ft with FlexTech covering to protect it on the floor.)
Added: I went and Googled a Yggy owner's manual just to see what they say about the Toslink. Amazed they say 3m or less. Three meters/ten feet. Seriously there is zero reason for a Toslink to need to be ten feet ot less. Maybe less than 30 feet.. But ten? (gimme' a break Schiit)
Here is a direct quote from an article about Toslink: ""TOSLINK cables are usually limited to 5 meters in length, with a technical maximum of 10 meters, for reliable transmission without the use of a signal booster or a repeater."" Like I wrote ,30 feet.
So I would say you should ASK Schiit WHY they think their stuff has to be amazingly short for a Toslink? I would like to know?
For USB YES, short matters. But not Toslink.
Link to Wiki Toslink: https://en.wikipedia.org/wiki/TOSLINK