I have one of these first units in Singapore and I must say the FIR filters for DSD does initially seem discernible between the 4 different variants but upon further investigation, the 4 analogue DSD FIR filters have different gain levels in all of them that could be deceiving when doing a direct comparison. I have found that Filter 2 being the loudest and the most revealing while Filter 3 offers the most balanced and satisfying sound to me. If not, the value proposition seems good for the price with all the bells and whistles of DSD64/DSD128/DXD decoding and the sound reproduction so far has been very satisfying. Keep in mind though that it does not have pre-amp facilities and the digital inputs are not as diversified as the Mytek 192-DSD DAC but its built quality is anytime better. Mine has not fully run in yet so I can't comment further. If not all the decoding facilities work as advertised. DSD decoding is available via ASIO and DoP v1.1 on the Windows platform and DoP v1.1 on Mac OSX.
I have a small discussion going on here:-
http://www.computeraudiophile.com/f6-dac-digital-analog-conversion/teac-...


