Here is an interesting review, in a European Magazine,
HIFITEST. If you want to read it use the translator function.
What is
VERY INTERESTING, is the tested
POWER specs for the ST-10, which shows how NuPRIME DOES NOT inflate their numbers, in fact, the very opposite.
While NuPRIME posts the Power output to be
150wpc at both 8 and 4 ohms, this bench test finds the following:
"With 205 watts per channel into 8 ohms resistor, the ST-10 yielded slightly more power than specified by the manufacturer. At 4 ohms the trace then handed the laboratory to just below 300 watts before the Klirrgrenze was achieved of 0.7 percent."
You can find and translate the review
HERE