I am sorry, I didn't mean to offend at all. I never mentioned Aries Cerat in that post, in fact I own 3 R2R DACs all single ended and only one is Aries Cerat. My point stands IMO, we seem obsessed with balanced topologies, it is the same in the 2 channel forums. I heard the WA33 and Abyss on the Woo stand, so make no apology for the DAC they used. It was best sound in that show, but there was only one other stand I heard with the Abyss and that was the dCS Bartok, which was clearly behind the WA33. I heard my own 3 test tracks off the streaming DAC they had on the Woo stand. On marketing, I have not directly asked anyone to come to my place to demo anything, buy anything. It is a tiny market in headphones for 10K+ amplifiers, so I don't bother. In fact, I have banged on about the very nice Moon 600i for the last 6 weeks, and I am NOT a Moon dealer.