I am not a huge fan of rubber bands either but I don't like sticking Velcro on the unit, when by itself it looks weird, with the rubber band off it's back to itself
I have said many times, the DX50 on it's own isn't that bad. My initial use was to flatten the highs a little I thought when I got the dap initially that it was really bright to me. At first it really irritated me but after that long with it I can tolerate it to an extent, couple of hours at most then I put it aside and wait a little later. With the amp, I can go for hours no issues. By the way the EQ for me is a no no, this is just the way I like it, never been a fan of EQ.