DT880's are brighter than most of my cans... But then again, "what's YOUR definition of BRIGHT?" Sound wise, to me they are very neutral. Female vocals are fantastic and details are up to par with most of the more expensive headphones out there. IMHO good choice for your bucks.
I've tried this though, dunno if this would help:
Modi/Asgard 2= brighter with fine details
Modi/Fiio E09K= darker with less details
Modi/Lyr= right in between the two but with fine details. (stock tubes)
I haven't tried the modi/O2 but people say they are darker than the schiit stuff.
Yeah, I'm gonna use a parametric equalizer to attentuate that little spike the DT 880s have in the 5k-10k range. Thing is, I am seeking a transparent and completely neutral dac and amp. I was really hoping the o2 and odac would be up to par, but after doing some reading they seem to be pretty finicky. I could be wrong, and by no means do I want to tarnish the reputation of a product that is of great quality. I have just read some reports that say the odac is really finicky when it comes to its USB power.
Heh, once my DT 880s arrive I won't even be able to use them for a while. :P