I agree. The L2 is actually very close to neutral for me. I've never heard the DX90 but I always thought it would exhibit that metallic treble a lot of ESS based players/DACs have. I truly find the L2 to be better than the older flagships like the HD6x0s, the Beyer DTs, etc. They have this inherent clear yet smooth sound which isnt just the effect of an overly forward treble. I've never found them to be analytic either. I really wish more people would get to hear it too
I use my DX90 with the L2. The important aspect of the DX90 is that you have to burn the player in for a long time.. IBasso suggests 400 hours. I actually did this and on open box there was a bit of that sabre sheen. But that went away the first 24 hours or so of use. My L2 and the DX90 make an amazing pairing. Highly recommended as a player for the L2.