Last night I download new firmware 2.10 for upgrade from my listrid firmware 2.00
After I heard 1 song I returned to Listrid 2.00
SQ from new fw 2.10 :
Overall less impact , less power ,less body in all frequencies
Like somebody doing gym without energy drink
High : less detail and full sounding high
Mid : so mellow
Bass : less impact and bass body , the bass can not like listrid very low and deep.and better
Speed
Separation : on par
Soundstage : feel wider but less depth
Clarity : less compare to listrid fw 2.00
I hope IRiver done for AK 100 like AK 120 fw 1.32 , SQ excellent
This is my IMO