https://www.stereophile.com/content/wavac-sh-833-monoblock-power-amplifier-measurements
If I remember right these Wavac 833 were on the front cover of Stereophile side by side with a pair of Agostio’s Krell Monoblocks, and underneath it said (because of the measurements)
"If one of these amps is right, the other one is wrong"
This got me thinking, so I obtained a circuit of the smaller bother Wavac 805 mono blocks
https://www.wavac-audio.jp/md805mk2_e.shtml
still massive and built a pair (35kg each). I had them for a couple of months and sold them, as my Krell type monoblocks were better in every area, except for that tube colouration in the mids, which is beguiling for a short time, but not long lasting.
Cheers George