Fosi Audio DS2 Dual CS43131 Portable Dongle DAC Headphone AMP 

The dual DAC chip has good output, but the disadvantage is that it cannot be enjoyed for a long time due to fast battery reduction. ;-)

CS43131 is from cirrus logic not ESS

Vs allegro cuál tiene timbre más natural real?.

Hey, Ian. Can I ask something? I haven't watched the whole video yet, I'm still doing my schoolwork... I'm just curious, does the unit you get actually use a CS DAC chip like in the title? because it's different from what is in my country, where there is a shop that carries DS2, but the DAC chip used is ES... Which one is right?

Cirrus Logic. Not ESS.