Some of the distortion measurements are as follows:
THD1 = 0.002% @1kHz
THD2 = 0.008% @20Hz
THD3 = 0.008% @20kHz
Keep in mind that these are the non-linear distortion values. Accounting for transistor noise, the values would be somewhat higher, but still I don't expect them to be more than 0.01% if using high quality transistors.
