Veri, I know what you're getting at. It's hard for me to understand why people really think these very pristine-measuring DACs will make any significant difference in their audio-nirvana (unless they have a really very crappy DAC). I'm interested in the D90 because of its measurements and Topping's attention to detail and engineering, yet, they have kept the cost reasonable. Don't mean to demean anyone who thinks they can hear an audible difference in this Topping as compared to any other very-well measuring DAC (but, that IS what it's really all about --
ENJOYMENT -- if you think you hear a difference, and are absolutely convinced of it, then you
DO). I liked the D90 because it was one of the best measuring DACs, affordable, actually performed up to its reported standard, and STILL had no noticeable performance glitches. I got the D90
MQA on a bit of a lark (would have got the D90 Standard otherwise), just because I wanted this feature - Do I think it's worth it? - I don't know; I guess I do when I see it's decoding MQA properly, yet my most prized digital files will definitely never be MQA.
If people want to really make a difference, think about speakers, room correction, and if you're an HP aficianado, better headphones (I know that's a very old and tired chestnut). No faults with the D90 MQA yet and still very much enjoying it -- why? -- I think, possibly because it's Silver
.