Id like to know wich type of wire i should use if i need to place my dac far away from pc. my best bet is optical cable but id like to hear that from someone smarter than me.
as far as i know usb would not work at all with that long cable ? am i right ?
USB max length = 5 meters
TOSLINK (optical) max length = 5 -10 meters
Coaxial = 10+ meters
Assuming that signal strength drops off linearly with distance (which may be wrong... but for a back of the envelope calculation seems reasonable) then you'll get the strongest signal from a coaxial cable (bnc or rca.)
Is the distance less than 5 meters? If that's the case then you can use any of the connection methods with equal success.
Edit: I just saw that you specified 10m. Which means that you are probably best off using coax (bnc).
thx for a reply Iniamyen, i have been googleing myself, and i found that the optical is better for longer distances, coaxial is not.
so wich one is right ? still confused
some even hear the diffrences in sound quality, other say thats impossible etc.
TOSLINK is "limited" to 5 meters according to Wikipedia. It goes on to say it may be possible to have longer runs.
I am not sure of the "standard" for S/PDIF over coax, but If you look around there are reports of people running it hundreds of meters. Google "coax attenuation chart" and you can see that for even a 1 MHz signal, only 0.2 dB attenuation occurs per 100ft of cable.
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as far as i know usb would not work at all with that long cable ? am i right ? 
still confused 
