32 bit 384Khz 512x DSD & PCM + 24bit 192 Khz S/PDIF coaxial input capability

with RCA+XLR analog output, optional KT150/KT170 x 2 big power tube and 274B tube rectification

default tubes included: 6550 x 2 + 274B or big globe 5U4G

(option:KT66/KT77/KT88/KT99/KT100/KT120/KT150/KT170/EL34/5881/6CA7/6L6/6G6/6Y6/6K6/6V6..as well as EL32 / CV1052..... and all those compatible tubes)

(Rectifier option: 5AR4, 5U4G, 5R4, 80, 180, 280.... and all compatibles, with 4 pin > 8 pin adapter can use 83, 300B...and all their compatibles)

This is a 512x DSD class DAC (can also take 64x native DSD, 128x DSD and 256x DSD) as well as 24/192 SPDIF input

Convert any music file format to 32bit 384Khz resolution via USB class 2 input.

Combined with the organic pure tube rectifer and big output tube section, easily convert the digital sound into analoge alike high-end vinyl MC cartridge playback quality, but with even better micro and macro dynamics with super low noise floor.

This might be the one of the best sounding DAC which work with big power tubes like

KT66, KT88, KT120, KT150, KT170, 6550, EL34....etc. This model even include top cap terminal for Mullard EL32 / CV1052 NOS tubes.

Rectifier tube use 274B / big globe 5U4G as default, user can easily roll this rectifier tubes with even 300B or 80 (with 4 pin to 8 pin adapter) . Max. filament current supply for the tube rectifier is 4A.

This DAC can effortlessly surpass the sonic performance of any small tubes DAC (6922, 12AX7...etc) or

medium size tubes DAC (6SL7, 6SN7...etc) and any solid-state DAC in the industry, no matter how

crazy unreasonable price they asked for.

USB input capability let you easily hook up your computer (MAC / PC compatible) or smartphone with supported USB audio interface, and transform them into a music server, which can play all ripped/downloaded regular CD or high resolution files

Super enhanced power transformer for "Hanging-in-the-air" 3D imaging, and good enough to power up the power hungry KT120, KT150 or KT170 output tubes, in pure class A single-ended triode configuration.

S/PDIF coaxial digital input for regular CD/DVD player hook up.

Hand-wired for tube section in order to achieve super high performance with such a bang-for-buck price tag, we strongly believe this unit can easily take down any other name brands DAC even over $10,000 range.

Super version upgrade include:

LCD for input frequency and mode display, with additional optical input

Micro-dynamic extraction circuit upgrade (MDE) for super high density and micro information

Enhanced power supply and components

USB Input data rate :

16 bit , 20bit , 24 bit and 32 bit ( 44.1K/48K/88.2K/96K/176K/192K/352K/384K) in PCM format , and native DSD (64x), 128DSD, 256DSD and 512DSD in DSD format

S/PDIF coaxial input data rate : 16-24bit / 44.1Khz - 192Khz PCM

Dynamic range >120db

S/N > 85db

max. output level 2Vrms (RCA) 4Vrms (XLR)

Input : USB + coaxial (SPDIF) + Toshlink (super version only)

Output : RCA single-ended + XLR balanced

Software driver included for PC user, no driver needed for MAC.

Upgrade options:

level-1 super low output impedance upgrade +$200 [US$ 160]

Super rectifier (STR-104) upgrade +$800 [US$ 640]

4 power tubes (6550x2 + 6L6GTx2) upgrade instead of just 2 + $800 [US$ 640]

Oil coupling and power caps upgrade + $500 [US$ 400]

Elegant solid-oak side panels + $80 [US$ 64]

KT150 x 2 tubes upgrade +$450 [US$ 360]

KT170 x 2 tubes upgrade +$600 [US$ 480]