In this series, the right channel freq response is nearly identical so not worth displaying here. Just below clipping, equivalent SPL of 113.4 dB SPL at 1 kHz, produces 0.025% THD. I have an attenuator and by accident, apologize for the inconsistency, the scale is dBu, but my notes say 113.4 dB SPL equivalent. That is a remarkable 467 V RMS. THD is 0.024/0.026% THD at that point.
In this series, Mjolnir 19-20 khz IMD. The amplitude of the 18 and 21 kHz products is not exceptional, but to my ears this is still one of the the nicest, most natural and warmest Stat amp I have ever heard. IMD measures 0.018/0.021%. Amplitude is not specified, but I suspect given my scales, it's near 100 V for either one of the partials.