Just received 2nd batch HM801(Firm 0.11 updated as of 2010/01/11
I'd burned-in for 50hrs
For the first listen:
-Powerful as hell
-Pretty detailed sound
-somewhat sennheiser-ish veils around mid-low bass
For the 50hr burned-in
-the senn veil gets better
-powerful as hell
-(from the headphone out) maybe deep-base around 30hz decays
compared to all of my DAPs HM801 surely is the best
but the low-impedance BA earphones doesnt work well with this player;
it's just over-powered for those
From what i tried the best sounding ones are
and the ones i felt doesnt match with HM801 were:
it seems HM801 is good for large dynamic headphones
my main portable rigs was:
iPod classic 160GB > Dock Staar DS-GETa > XO(AD8620) > IE8 or TF10PRO
Alneo V80 > IE8/TF10PRO
among those I can say although HM801 has following controversial points
-the power intensity around mid-bass
-somewhat sennheiser-ish fogs covering around whole sound
-iPod-like round-sound sigs
-bad compatibility with BA earphones(except ER4S)
it is still the best of what I have.
btw for the UI-wise it is pretty messy, i really hope rockbox firm for us.
so far i haven't encounter any of HW/SW crash yet, nor Eeee noise by button maneuvers.
It has pretty good S/N ratio and almost no noise.
As a USB DAC it sounds even better than the M-Audio USB Transit
hopefully there would be more reviews from who received 2nd batch recently..