I've just sent off an email to mCubed technical support on this subject but wondered if anyone here had a clue! I've been looking through some reviews on the mCubed HFX case and almost none of them make any sort of mention of the RCA plugs on the back of the unit: The only one I've found is a french one which included these two pics: The review shows the plugs linked up to an Audigy 2 via some cables which are included with the case. This intrigues me as I've not come across any other HTPC case which emplys anything similar. I've asked mCubed if the RCA/Cinch jacks may be all be used as 'outs' and if they have a list of approved cards which support these connections. What I'm really interested in is whether I could make use of these connections with my power amps? If so, what decent cards could I use? I'm assuming of course that the volume could be adjusted through windows. No point setting this up if the internal connection is at 100% 'signal' level only. (apologies if my terminology is upside down) Any ideas?