I have bought a K540 in September 2013 and it has been broken in 3 months.  Its material quality is the worst I have ever seen.   I am extremely disappointed and will never buy any AKG headphones again.   I cannot use it any longer with those broken parts. See the photos with red marks.    

It's nice to join Head-Fi as I am new in CAS and I have a simple question about bit perfect streaming. Right now I only use onboard audio chipset VIA 1708B with a toslink to the Zero DAC. Software is Windows 7 with foobar 2K + WASAPI as output at 16 bit / 44.1KHz. How could I know that the...