... chip resistors, sound special ENLA electrolytic capacitors, tube, USB port, RCA terminals are gold-plated material, full ON ... regulator device. Amp output gain adjustment, replace the amp module Amp specifically designed for replaceable modules, in particular, ... optional wide range of headphones!Parameter: productT1 24BIT TUBE USB DACColorsilver , blackWeight2KGSize15.5*9.7*4cm Frequency response20hz- ...