Real price Tanly Audio USB converter 300-350 usd (IMHO), but in stock the price is overstated....570usd -it is expensive .... We will wait when the price becomes more democratic

I had an idea! to use Teralink ADuM4160 USB Isolator board, but D+ and D- to connect separately direct from computer. http://www.ab-system.hk/index.php?route=product/product&path=73&product_id=63   In this case will be isolated : usb Vcc (+5V) and shield and GND!!!

"cut GROUND and black NEGATIVE wire from usb cable"   http://i.imgur.com/wt6ha.png In scheme usb cable: black wire = GND   You too cut off the shield in cable? Interestingly how works +5V without GND (-) and shield?

Try to return USB Ground in cable.  It has to work (into cable must be: D+, D-, GND)

you can check a tester ? I will do DIY adapter as on the scheme (Scheme Special USB-Audio Adapter)

if you used a cable from a kit: (in it shield is connected!)........ or not (I am not sure).....?

Hmmm.... if it so, then is possible to make special adapter:

USB-GROUND from computer it is necessary for data (D+ and D-) transmission work. Use ground from IEC320 doubtfully (imho)... usual work mode usb will be broken and XMOS not started detection data....

How your usb cable is called? It is possible to put a jumper (remove JQC-3F) 

Why you want to use U12 without USB power?  U12 it use as ONLY switch (on/off)... In the device not used usb power!     • smart switch, USB has a current interface to boot.Interface with the computer switch and switch machine(computer to be set off USB power failure), or unplug...

Hi I didn't find such, but progress doesn't stand still ;-)   Converter with full galvanic isolators so little in the market (EDEL from ABC, audiobyte hydra z, tanlyAudio...) http://www.abc-pcb.com/?page_id=187 http://audiobyte.net/products/hydra-z...

all of them not cheap:   Crystek oscillator CCHD-957-25-45.1584 US $28.53 http://www.digikey.com/product-search/en?s=29728&pv139=2611&FV=fff4000d%2Cfff8016e&k=crystek&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25   Vanguard TCXO 0.1ppm 45.1584MHz Ultra...

In MX-U8 PSU better..., but not VERY VERY considerably... lower crystal frequencies were established in the previous model Gustard U10: http://www.kidultdiagnostic.com/dac-c-13/gustard-u10-native-32bit-384khz-xmos-dac-p-272.html#.VTljINKsWzk...

to hgpsemaj   JRiver

MX-U8 has only one advantage: better PSU (talema + LT1963 + 4x2200uF) in Gustard U12 (LM317D2T + AMS1117 + 2x2200uF) In MX-U8 oscillators: 22.579200MHz and 24.57600MHz.... in Gustard oscillators: 49.152000MHz and 45.158400MHz interestingly why? Better Digital Transformer (Murata DA-101C) in...

DSD+Gustard U12+Gustard DAC-X12: DSD64 in DoP playing without problem - all outputs is working; DSD128 in DoP playing but ONLY with very good interconnect i2S HDMI cable, other U12 output is not working! Native DSD64 and Native DSD128 - playing ONLY with I2S HDMI cable, AES/EBU and Coaxial...

Hi,maybe somebody compared Melidious MX-U8 vs Gustard U12?     p.s. In Gustard costs CPLD ALTERA MAXII EPM240T100C5N interestingly for what targets?      

Hi, with my Tiny MPD (Linux) I have same trouble's using this device..... If i playing file's 44.1k 16bit and next file in playlist 44.1k 24bit -> noise/silent, and on display Gustard U12 i see "----" converter is not working, I need restart Gustard (on/off power cable). If i playing this...

Interesting moment: 5PCS Transformer PULSE DIP-4 PE-65612NL + FREE Shipping costs US $2.30  http://www.ebay.com/itm/4PCS-Transformer-PULSE-DIP-4-PE-65612NL-/251019403380   10PCS Transformer PULSE DIP-4 PE-65612 PE-65612NL + FREE Shipping costs US $4.86...

"funny" Murata is installed in very expensive devices: Burmester 089 cd player: €14500 http://www.i-fidelity.net/en/Printview.html?showUid=1015 and M2Tech Vaughan DAC Price: $7,999.00  http://wizard-highend.blogspot.com/2012/12/m2tech-vaughan-inside.html...

Digital transformer has a great influence on a sound, the frequency is higher -> the more obviously! Murata using for cd players, DAC, so to replace PE65612, PE85812, DV709 and another old the pulse transformer have direct influence. Murata DA 101C is completely compatible with 192K a...

Maybe it is worth replacing my current  setup?:   using modding Leaf Audio XMOS 384K/32bit PCM5102 DAC (Xmos version 8L6C5 GT1325L1) as usb converter USb-to-SPDIF with external power TeraDak U9VA Linear Low noise Power Supply + Power Supply A&B Cardas pure copper DC cable 1.5ft Comp...

Very interesting devicу this Gustard U12:   "Newest XMOS chip and uses 48MHz oscillator to asynchronous reclock usb audio data to I2S line, old XMOS uses only 13Mhz oscillator, over 4x better jitter rejection theoretically" Display, PSU inside, AES/EBU, i2s , opt and coax and Built-in smart...

My setup DragonFly:         Real photo here: http://www.head-fi.org/t/617241/audioquest-dragonfly-review-affordable-outstanding-tiny-dac-amp/825#post_8949619