Today I decided to take an old iPhone 3G out as my music player instead. I find myself actually having a more enjoyable experience because the background hiss is very much nonexistent (practically inaudible) compared to DX50 (intrusive). Although the details, separation, clarity is nowhere near the DX50, I am actually enjoying the music rather than wishing the hiss is gone.
Don't get me wrong, I use the DX50 a lot, until I found the iPhone 3G lying around yesterday. Loaded it up and I think this just might be my on-the-go device until I can get an impedance adaptor to test with the DX50 HO.
At home, I have no hesitation using the DX50 LO to the JDS assembled O2 on 1x gain (might mod it to go 0.5x, but I'm not sure if i can do it for just one gain setting without affecting the 2.5x gain). The black background is a high priority for me and undoubtedly, the DX50 performs spectacularly with the O2.
The DX100's UI is not that bad, it's not smooth as other android devices but it works as it needs to be sorry for the OT. But the short battery life may kill you.
As for the hissing of the DX50, I used the Arrow to fix the hiss and it adds the least bulk IMO. Haven't tried the E6 or Firestone.
Edited by tak- - 12/22/13 at 7:04pm