It is a 5-in-1 unit: can be used as 1) external USB DAC for laptop through any output, 2) headphone amp, 3) tube processor for analog signal, 4) digital decoder for optical and coaxial signal, 5) pre-amplifier with volume control.
You can use it directly with your digital source such as laptop and music server and play music back through your existing amplifier or powered speakers. Or you can simply get a pair of high quality headphones and enjoy the music in private!
(5) sets of selectable inputs to allow you plenty of choices - including 2 sets RCA, 1 coaxial, 1 optical and 1 USB
(2) sets of RCA Outputs tailored to your taste - one with transistor and one with a single 6N11 vacuum tube (can be replaced with 6922, E88CC, 6DJ8, 6H23n and CCa tubes) with passive volume control
DAC direct output - by pass tube buffer stage and volume control for you to match the DAC with other high end amplification (amp must have its own volume control as DAC direct output pass signal at full volume)
Built-in transistor headphone amp to allow you enjoy music in privacy (standard 6.5mm jack). Alternatively, you can use a RCA to 6.5mm jack adapter to connect headphones directly to the rear tube output. Note: front solid state headphone out can accept headphone with impedance as low as 16ohm; rear tube out only work properly with headphones with impedance over 300 ohm.
Key parts are of audiophile quality throughout
High efficiency low noise custom toroidal transformer which is usually only used on high end audio
Separate power supply to tube circuitry to reduce interference
Gold coated signal connectors throughout
No over-samping - input singal pass through at original sampling rate
TE7022 USB 2.0 decoding chip is used to process data at 24/96kHz
High quality Cirrus Logic CS4398 for main D/A converter - provide rich mid-range and low clock jitter
ADA4075-2 as opamp for sweet midrange
Dual voltage (115/230V +/-10% wide range) for you to take it with you anywhere in the world
Brushed aluminum faceplate and complete casing
Complete set of cables included: (1) IEC power cord, (1) RCA, (1) Coaxial, (1) Optical and (1) USB