I plan to post info about the SW1X LPU phono stages here. Look for Michael Fremer's glowing review in the current issue of Stereophile of the SW1X LPU 1 Special phono stage. Here is a link to a review from 2017 Of the then LPU II. All of the designs have undergone significant upgrades since. https://www.tnt-audio.com/ampli/sw1x_phono_preamp_e.html