I have ran 25' feet of optical cable on (ST) connector. This has been ran from Theta equipment. With the AT&T option. I have found no degregation in sound. I guess it depends on the equipment. I have cables that you can try, if you don't like them send them back for a refund. Also the ST is rated in kilometers - the toslink is only rated in meters and is not very good from what I hear.
HELP -- 20ft optical connection okay?
This may be a silly question, but, I have about a 20-25foot distance from my transport to my DAC. The transport (Oracle) sits on an antique chest quite far from the rest of my equipment. I think this situation is okay given the nature of optical cable; however, I am far from an expert and would appreciate any insight as well as suggestions for brands. Thanks, Sean.