Nowadays more and more PC user require better soundstage from PC system. However, the sound come from computer and soundcard is not dedicated enough, the annoying noise & distortion is hard to avoid an outboard digital to analog converter that receives digital signals through USB cable seems to be welcome solution.  So KingRex build up one good solution for music lover- UD-01 (USB DAC). It turns mundane desktop and personal audio into exciting high-end performance(The DAC –characteristic architecture is built around Burr-Brown PCB2702E DAC chip which is dedicated two channel audio has large internal strong buffer to store up audio packets. Low pass filter: Burr-Brown OPA2604 acts as output stage preamp and taking out the residual digital garbage and turns the audio signal into more analogue sounding stream to guarantee sonic excellence. DC servo: Texas TL072 low noise JFET op amps assigned to DC servo circuit. Coupling capacitor is to avoid harmful sonic impairment

The petite UD-01 delivers a strongly musical ‘non-digital‘ presentation thanks to the (TI) Burr-Brown OPA2604 which acts as an output stage preamp and a design that completely omits coupling capacitors.

The primary chip is the Burr-Brown PCM2702E mated with a large internal buffer for audio packet storage, effectively re-clocking the input stream. The UD-01 delivers everything in spades: timing, soundstage, resolution – yet never sounds dry or squeaky-clean like the majority of low-end DACs. Rather, it is weighty, mellifluous and coherent. Though it‘s a cliché, this DAC delivers a sense of musical ‘rightness‘ normally associated with much more expensive converters. This really is a DAC without flaws: extremely well articulated bass, smooth and natural midrange and a detailed top end – all beautifully balanced.

SPECIFICATIONS :
Main USB Decoder Chip: Burr-Brown PCM 2702E
16-bit 44.1khz/48khz sampling rates
Low Pass Filter OP AMP: Burr-Brown OPA2604(With socket),interchangeable by user‘s
favorite OP AMP.
DC Servo Chip : TL072 (With socket),interchangeable by user‘s favorite OP AMP.
Coupling Capacitor less, improving output sound quality
Power rating:/DC 12V +-10%
Adaptor: input: AC 100-240V(47-63Hz),output:DC12V/0.5A
Size: 110＊75＊33MM