How about a Griffin Powerwave? It takes USB from your Powerbook (which is better than spdif anyway) to a built in dac (I really don't know about the quality of the dac itself) and sends it to a built in tripath amp...$90 which gives you a lotof $$ for speakers. People are buying the Powerwave just for the amp (and modding it also).
BTW, have you tried Apple lossless? It really seems to work..I'm building a digital system around a G4 iBook, external 2.5" drive and a Twin Dac (via USB)... all battery powered, fillterless, without jitter.
Steve
BTW, have you tried Apple lossless? It really seems to work..I'm building a digital system around a G4 iBook, external 2.5" drive and a Twin Dac (via USB)... all battery powered, fillterless, without jitter.
Steve