Teajay -- thanks. Just my opinion, but I find it odd to not have one as standard for $13k.
Even simple, elegant gear that's directed toward audiophiles would assume there would be a need for a pre-out for subs. My two cents.
Audio Mirror WAVE tube based line-stage is one of StereoTimes 2023 Most wanted Components
Last week my review on the Audio Mirror WAVE reference line-stage was posted on the Stereo Time website. It gives the details why I put the WAVE on the 2023 MOST WANTED COMPONENTS LIST. It's a terrific tube based preamplifier which offers great transient speed, clarity, richness of tone/color, and panoramic sound-staging.
Hope you enjoy the review. Teajay (Terry London)