Got my hands on another Sunn amp. Sunn Solos I 2x12 110w. From the very limited info I could find online, people describe it as Sunn's take on the Twin Reverb. Tube
Old Sunn amp in small town store : r/GuitarAmps
Sunn 2000s amp//used on sunn O))) recordings | Reverb
distinction between sunn o))) (artist) and sunn amplifiers - Rate Your Music
Sunn Amplifiers | Pete Townshend's Guitar Gear | Whotabs
We Started with a Concept! Sound You Can Feel - Sunn advertisement (1969) >> Vintage Guitar and Bass
Cool Sunn Practice Combo Amp Blows a Fuse | Unbroken String