Ok, so I entered new parameters you gave, 92db in mW, 18 ohms and 110db loudness target for the Edition XS. I get this amp power requirement.
View attachment 196633
Ibasso DC05 Amp / Dac Specs
Maximum non-distortion level: 1.73Vrms (32Q2 Load), power is about 93mW
Maximum undistortion level: 1.5Vrms (16Q2 Load), power is about 140mW
So am I correct to assume the Ibasso DC05 portable dac/amp has more than required power plus plenty in reserve to run the Edition XS? Or did I punch in incorrect parameters?
Should be if Hifiman's sensitivity numbers are accurate. I think they are overly optimistic (to be nice) about that sometimes. lol