Vintage tube Sunns came in three basic flavors, 2 X KT88/6550 or 4 X KT88/6550. Some Sunn amps were a 2 X EL34 configuration. All of them were based on David Hafler and Bill Laurents Dynaco Hi-Fi circuits.
In fact originally the amps actually were Dynaco amps stuffed into a box. These were early top controlled split chassis amps (sort of "Vox" like), and they came with a Dynaco Mk III (2 X KT88 60 watt) or the more rare Dynaco Mk IV (2 X EL34 40 watt) power amp, both with a modified Dynaco PAM-1 preamp mounted separately on the top of the box.
Pre Hartzell (early 70's), Sunn amplifiers were not available as heads only, and were only sold in combination with a matching speaker cabinet(s), i.e; a 200S was a 60 watt head with a 2 X JBL D140F cabinet while a Sorado was the same head but paired with a 2 X 15" "Sunn Transducer" (CTS?) cab, a Sceptre was the 60 watt reverb/tremolo guitar head with a 4 X 12, Sentura II same head but 2 X JBL D15S (re-badged D130F) cab, 100S same head but with a D130F and a LE100S horn.
All of them, bass amp or guitar amp, shared identical power amp stages.