Long range music server 2010-01-28 11:15:38 He. I'm planning to build a rather decent sounding system where the source will be a either mac or pc based server. Now the main constraint is to route 3 different stereo signals to 3 different amps, each on a different floor. Here are the solutions I'm considering (some might be obviously wrong, as I didn't find the proper information, any correction is gladly welcomed!):1. - Use as many as it takes, on-board (or preferably external) audio card with coax s/pdif outputs such as m-audio delta 66 http://www.m-audio.com/products/en_us/Delta66.html- link it to the amps with low as possible impedance coaxial s/pdif cables.2 (if that's even plausible).- Use a/several pci card(s) that could output data through a fibre optics cable- link that fiber optic cable through an optic capable DAC, then link it to the amp.(if someone could explain me the whole concept of an optical s/pdif output on an audio card, why would that be needed if you need to convert the digital optical link to analog for the amp?)3. Same as 2 but using Usb cables and hubs to usb capable dacs.From what I've read on the limitations of optical links (6meters max), perhaps I should discard this option.If anyone can give me some advice on the best possible (yet affordable) way to get a clean signal from the source to the amp, that would really be appreciated. (btw, couldn't I use some device to perhaps regulate the signal in the coax cables half-way through?)many thanks in advance!