From CA forum:
My DAC is Bel Canto DAC 3.7 without USB In, so using a USB (or ethernet) to SPDiff convert is a must for me.
I tried many USB converters but I decided to use Bel Canto ref Stream (Ethernet rendered) because this solution has proved to be clearly superior to every other USB to SPDiff converters I have tried before.
So how the SU1 works compared to Bel Canto Ref Stream?
I was very impressed by what I discovered.
- Test #1
I'm usually use my Mac Book Pro (late 2011) for audio with both Audirvana + or Linn controller with minim server and Bubble upnp on my Qnap NAS.
So the first test was made comparing these two different configurations:
A. Mac Book Pro with Audiorvana + to Singxer SU1 (Oyaide continental) to Bel Canto 3.7 (Oyaide coaxial BNC).
B. Mac Book Pro with Linn Kazoo controller to Bel Canto Ref Stream (LAN network with In-akustik CAT6 Premium cable and GISO DS ethernet isolator) .
The test results showed no significant differences, the two system was sounding so close that was difficult to identify them.
This was the first time that an USB converter was comparable to my network reference, that by the way costs much more than the SU-1 ($2,495 Vs $399,00).
Last week I read your review and I was intrigued to try XMOS Windows ASIO drive in my Dell XPS 13 Laptop.
I have downloaded the SU-1 package from Kitsune HiFi that includes drivers.
- Test #2
A. Mac Book Pro with Linn Kazoo controller to Bel Canto Ref Stream (LAN network with In-akustik CAT6 Premium cable and GISO DS ethernet isolator).
B. Dell XPS 13 with Foobar (XMOS Asio Drivers) to Singxer SU1 (Oyaide continental) to Bel Canto 3.7 (Oyaide coaxial BNC).
The first thing I said was "WOW !!!".
Witht the XMOS drivers in place (for sure also different software and different computer) the Singxer SU-1 was beating the streamer by far.
More transparency, more details and more tree dimensional soundstage. The difference was not subtle - I can not go back.
_I must also mention that while I was using the Ethernet GISO isolator on the streamer, no kind of USB purifiers has been used with the SU-1. So I think there may be room for further improvement.
P.S. For those of you jumping on the Holo Audio/Singxer solution, a note of possible incompatibility, and a solution. My Singxer was shipped with XMOS firmware V2.02 (not driver number, firmware number). When playing DSD via I2S I discovered that the DSD channels were reversed, but not PCM.. If one is using a product like JRIver this is easily solved: switch your dac to preamp interconnect leads and tell JRiver to swap your PCM channels in DSP. Since JRIver does no DSP in DSD all is well. However, for HQPlayer users (and for purity sake) I am not comfortable with that work around. After chatting with Leter from Singxer I was given a slightly earlier V2.00 firmware to install, and now all is well.