Kingwa has released the 2021 versions of the R2R DACs -
New Features
R-7 (2021 version) feature:
1, USB and HDMI apply the separate isolators and isolate pure class A PSUs for avoid the interrupt from computer and HDMI sources.
(New Feature)
2, USB apply the bidirectional isolator that can transmit the IIS signal to the FPGA processor and receive the clock signal from the FPGA processor, the USB interface without on board data clocks, the signal transmit is much exact, the sound quality get the much improve , similar to the last generative R-7 combine with DI-20 (But not DI-20HE) level.
(New Feature)
3, HDMI input apply isolator for improve the sound quality .
(New Feature)
4, Input signal sampling display .
(New Feature)
Check out the landing page on the Audio GD website -
http://www.audio-gd.com/En audio-gd.htm