Item arrived yesterday, UD125 able to raise the volume of my Superlux 668B compare to just computer audio jack.
Sound also from IEMs such as KZ, Hi-Z, Piston HD, Fischer Audio also feels more alive.
Letting a friend testing it now and he also impressed by it and he's also thinking of buying a unit if he cant DIY it himself.
[WTS] Stoner Acoustics UD125, Made in Malaysia Sound Cards