Coax is better. I'm not an engineer and I'm not going to pretend so I can't back my answer up technically. If you were doing a ridiculously long run of cable, then optical might actually be better, but Coax is better.
Coax or Toslink, Which is better?
I'm thinking of purchasing a cd player but it only has a Toslink digital out. I'd prefer a coax since I have a Stealth digital coax I just purchased. Is there a big difference in audio quality and signal stability between the two? I have a Marantz cd recorder with Optical and coax digital ins. Sorry if this has been asked before?? Thanks Joe Lienhard joelien@wa.freei.net