So oabeieo you have 3 hds with an optical splitter and that works no signal degradation am i correct? I was thinking running 4 hds with an optical splitter in my bmw using toslink on the optical ring bus. Ill just use a mobridge converter. I have 14 speakers now if i dont add a seperate sub if i did that will bump me up to 16 channels so 4 hds. Maybe i can run dirac on each hd later i wonder if that's overkill lol