ATI AT522NC = 0.001% THD+N, SINAD 99.9dB (ASR).
This is a review and detailed measurements of the ATI AT522NC Stereo power amplifier. It is on kind loan from a member. The 522NC costs US $2,195 but I see it on Amazon for US $1,995. The AT522NC is part of a series which starts with 2 channels of class D amplification and goes up to 4...
www.audiosciencereview.com
So even if the 1200-modules have lower THD+N, you will absolutely not be able to hear a difference between a THD+N of 0.001% and something lower.
But I guess it could make some people feel better/pride of joy.