SMSL DO100/HO100 Review: This Affordable DAC/Amp Combo Is A Budget Audiophile Dream! - HIFI Trends
Archimago's Musings: REVIEW: S.M.S.L. DO100 DAC [Part III - DSD, Subjective, AMPT Recording, and Conclusions]. And a very close look at the Topping D10 Balanced THD(+N) vs. Level graph.