As far as I can tell on the NOS1704, no upsampling, oversampling, etc. Same treble drop in FR, and high FR sine waves on oscilloscope looked nasty like they did from the Metrum. I could be wrong, though. I'll have to compare when I get the Classe in, but I never heard that AGD DAC as soft relative to others. Well, it did have a super slight touch of dynamic grayness and compression (vs. transient smoothing I often hear from high-OS DACs), and small details were sometimes made more noticeable than they should be. I was surprised the NOS1704 measured well with THD, it was a good bit more resolving than the Metrums, and sounded more like a smooth S/D DAC (you get the idea).
Anyway, perhaps the PMD100 does sound good. It's hard to get a good idea how it sounds since impressions floating around often don't have personal taste mixed into the context. "PMD100 sucks! Can't do more than 16/48! Insta-replacement! Lacks detail and clarity!" And, for all I know, these are the guys that would like sabre DACs. I should have the Classe in today or tomorrow to hear it for myself, though it might not be representative of the type of sound you're getting from the SFD.
