I used to own the PS Audio DirectStream and sold it shortly after the Yale firmware was released last year. I tried all the various firmware that were available as this DAC allowed you to go back and forth so that you could decide which presentation you liked the best. In that sense, this DAC was a chameleon and consequently had somewhat of identity issue as you could choose the older firmware that was considerably darker or upgrade to the latest firmware that was tipped more to the treble but was also better resolved. It was almost like tube rolling. Ted Smith, the "Rob Watts" equivalent for PS Audio, is a brilliant man and a nice guy as well. Like Rob, he is very active and helpful to answer questions on the PS Audio forum and he is a large reason for the success of PS Audio. Like Rob, he very much thinks outside of the box but he and Rob have philosophical differences regarding their FPGA DACs and it will be readily evident once you take a listen. Ted upsamples everything to DSD and as we know, Rob's DACs do not do that. My DirectStream had a soft/smooth signature but lacked in detail. It also sounded very flat and when this didn't improve when Yale came out, I realized it was time to move on.