@johnah5 The OP shared his experience with the Doge for the community's edification, not to receive a lecture on how he's a dupe. FYI there's many who don't care if a tube can only resolve 90 db of dynamic range if the sound is music to their ears. Actually it's ALL about the sound not the "dynamic range" to MOST folk here I'd say.
I have DACs like the Topping D90SE that sit on the shelf far more than my other DACs because its magnificent dynamic range fails when it comes to convincing timbre and soundstage dimensions. Even my R26 is far better than the D90SE in those aspects.
Measurements like input and output impedence are useful when matching for example tube pres with SS amps - but other measurements like SINAD are much less useful other than for forum fodder for bored keyboard warriors looking to troll.