Actually they are in both places.

They are the same except for the size and that the DAC502 has an additional 4-pin headphone output at the back.

The display brightness can be set via the touchscreen. Two different brightnesses, one for active, one for passive. It cannot be turned fully off though.

Thank you for the great review! I appreciate it very much that you had a detailed look at the DSP algorithms. (If you have a chance to check the XTC algorithm (speaker mode DSP) I suggest to do so. It basically is a headphone made with speakers - the left speaker goes to the left ear, mainly...

Hi there I am looking for headphones which are kind of similar to AKG K1000 or Mysphere or Float QA, i.e. where the headphone does not touch the ear at all. Are there any other manufacturers doing such headphones? Also of interest to me are in-ear headphones which are open, like the Sony...