FiiO's first R2R DAC with tube buffer, continues the retro design of its predecessor and features a dual-channel stereo LED-backlit analog VU meter. It also includes USB, OPTICAL, and COIXIAL digital inputs, as well as RCA and XLR analog line outputs. It features FiiO's in-house developed fully differential complementary 24-bit R2R resistor array DAC, four imported JJ ELECTRONIC E88CC tubes from Czechoslovakia, and an optimized...