dave
the insight dac is a solid state output stage dac, correct? i don't know the exact model evolution over time of frank's dacs
i am lucky to have 2 of frank's dacs in my possession, used in two different systems...
1) a FET TOPP Dac, circa 1998, Philips R2R chip, 12ax7 tube output stage, can't read anything other than redbook - but sounds soooo natural so much like music, not like so many 'x-ray vision' modern dacs
2) a FET Hybrid Dac, circa 2016, wit Wolfson DS chip, 6922 output stage... also sounds wonderful, reads the modern high bitrate stuff - very musical, a touch more dynamic perhaps
of course with the tube output stages in these the tonality can be subtly altered with targeted tube rolling...
good luck with your sale... anyone interested should know these modestly priced AVA DACs compete on sound quality with big dollar modern dacs out there, in musicality and 'analog-ness' if that is a word...
