I already used the search function of this forum but I didn't find the answer so I'm asking here.
I bought a pair of Senn HD 598 after reading lots of reviews, they should be easy to drive with almost everything but when I plugged them on my computer (integrated motherboard audio) the sound was just weird and much different for what I read about them. Their should be weak or at least have an adeguate amount of bass but instead, they have a really bodied bass response (not kicking but soft, still too much) and the mid-range is harsh and confused, the vocals are not sharp as they should be and are like subdued. I'm sure that is not a problem of this headphones because using my Galaxy Nexus the sound change in better and opens up, the mid range sounds good and vocals are just like they should be.
I listen to high quality format such as flac and MP3 at 320 mbps bit rate, I use foobar2000 as music player and my motherboard is an Asrock Z77 Pro3; I don't use any kind of filter, enhanching or SW EQing.
To find a solution to this problems I bought a Xonar Essence STX but is not arrived yet. Anybody knows how the Xonar and the HD 598 sound combined? Should i buy another another Amp? (The STX already have a headphone AMP).
I already read the thread about the Xonar but for this headphones do you suggest to change the OpAmps?