I recently purchased the Sennheiser HD 558 for (mostly) gaming, now I'm looking to find the best possible setup for these headphones. I was able to lend a DAC from a colleague for testing purposes. It connects through a S/PDIF toslink cable.
It seemed (!) to do a better trick of making the audio more clear and somehow it even seemed to give me better positional audio aswell (in BF4 and CODBLOPS2. However I'd like to know what might be the suggestion for the best possible sound setup in my scenario. Also I want to be sure I'm not purchasing something because of a confirmation bias.
My motherboard is the X99S Gaming 7 with the Realtek AC1150 Codec onboard. I've been doing quite some research on DACs and sound cards but there's this saying about a forest and trees or something... :)
It basically boils down to this: Will I benefit from using this DAC over connecting my headphones through the 3.5mm jack on my motherboard in terms of positional audio and sound quality or not?
Thanks for the help!
Edit: The headphones have an impedance of 50 ohm.