Hey Guys,
In the February edition of Stereophile the reviewer, Herb Reichert, gave a superlative rave over the XA-25 performance. I believe he kinda missed how terrific the amp's tonality/timbres and its rendering of 3D/imaging and space are, but he did get how quiet/transparent it is compared to his SET tube amplifier or possibly any amplifier on the market, along with its speed/power/control overall.
John Atkinson's measurements showed that the XA-25 greatly out-performed its stated power ratings significantly, indeed. It's specified power out put is 25 watts into 8 ohms and 50 watts into 4 ohms. Atkinson's measurements were 80 watts into 8 ohms and 130 watts into 4 ohms.
Pass Labs is always quite conservative in their ratings to begin with, with the XA-25 this little amp in size is quite the powerhouse hitting way above its ratings.