When I first installed it, my MacMini was seeing is as a 384 device and I wasn't getting any sound. I few quick emails with John got it going. I had to go into my Midi utilities and physically turn it down to below 192. For some reason Macs don't pick up the source sample rate automatically. If anyone knows about this I'd appreciate some tips. This is really my first toe dip into the digital pool. I know next to nothing.
So while trying to figure out why I wasn't getting any sound, I was going back and forth between my Dragonfly and the Ciunas. Once I got the settings right, and sound started dripping out, I was amazed. My first impression to John was that it was like walking from the shallow end into the deep end of the pool. If you can describe audio in three dimensions, it was a little taller and a bit wider, but significantly deeper. It was most noticeable in reverb trail-offs and piano sustain. Notes just seemed to hang longer in the air. Cymbals rang on and on. I haven't had enough time to really analyze instrument separation and details of image yet.
Unfortunately, I don't have a lot of big music files to really take advantage of what the Ciunas can do. This is going to cost me money revamping my library! But it will be fun money. Like buying a new album used to be.
FWIW, the audio chain is an early 2009 MacMini, Transcendent Sound Ground Grip preamp (Tube), TS Son of Beast OTL amp and Altec A6s (288-16Ks on top and 3156s (4) on the bottom). So the sound is very transparent, uncolored and detailed. OTL amps hide nothing.
Now if I can only find a way to get paid for listening to music, I wouldn't have to go to work now...