15 feet is supposed to be the limit for usb cables, unless you get something like an Opticis optical usb cable. I had the same issue, went with the Opticis for a while, but it had trouble with 24 bit data streams. I now have a mac mini on my stereo rack connected to an Empirical Audio Offramp that feeds the digital input of my Wadia 860x cdp. Having the mac mini on my rack means I can use a short usb cable. Buy a good one as they do make a difference.
As to the Lynx sound card, I suppose you could run a 20 foot (7 meters?)length of aes/ebu cable to the stereo...
As to the Lynx sound card, I suppose you could run a 20 foot (7 meters?)length of aes/ebu cable to the stereo...