Help! Treble Trouble!

Ok, cognoscenti, put your coconuts together.

The system I've put together at the house I stay in while working out of state has a problem. I have nonexistent treble at my listening position, particularly cymbals, high hats, etc. Not a toe in/toe out room problem as I can sit right in front of either speaker and stick my ear two feet from tweeters and hardly anything. Can hear it ear stuck right up to them. My high frequency hearing is fine. This happens with any source, digital or analog. Not the speakers as it happens with either the two sets I have here. Happens with to different amps also, Odyssey Stratos with plenty of juice and a Belles Aria integrated. The common denominator in this I think is my dac. Is it possible my trusty old Mytek is somehow conking out and causing this? 

Mids and bass are smooth and clear, just missing a lot of highs and it's mucking up my listening enjoyment. So, what do you guys think?

Gear here:

Odyssey Stratos amp,

Belles Integrated,

Mytek Stereo 192-DSD dac

Living Sounds Audio LSA20 signature speakers

Avance Epsilon980 speakers

Denon dp-57l turntable

LeJonklou Slipsik 7.1 phono pre

Audiolab 6000cdt transport.

Thanks!