Finally tried Diablo iDSD on loud speaker setup vs some SMSL DAC & old flagship R2R DAC.
Diablo setup is with iFi ipurifier3 (reclock) + iFi iDefender (USB conditioner) + 5V iFi iPower Elite on power to the iDefender with iFi Mercury 3.0 USB cable.
beat SMSL M400 by alot.
when compare to Sonic Frontier the old R2R tube/Dac combo, I can hear the Diablo only can win on soundstage & details with slight more airy. the Sonic Frontier dac wins on vocals with warmer sweet sound.
now I know why they prefer Diablo over those expensive dac.