Gaming: Xonar DG(front panel) ---> Headphone   Music: Xonar DG (optical out) ---> DAC ---> Amp ---> Headphone   Movie: Xonar DG (RCA Out) ---> Logitech 5.1 X-540 Speakers   are there any problem for my setup??

From what I've read on their website, the dedicated psu pumps out 12v. On the other hand, the battery compartment takes 2 x 9v batteries , since it runs for 40 hours , i would assume that it runs the 2 batteries in parrallel into 9v . Is there going to be any sonic difference between the two...

my second audiophile IEM. My first one was a Nakamichi N90-P, decent but not great.   comes with decent packaging, a nice case for the iem . comes with memory foam tip , and a couple of plastic tip gave it about 20+ hours of burn in time before listening to it. My first impression...