Tom Bowlus does one of his excellent in depth reviews of this head.
Mine is more of an impression. At 50-55lbs., present day me had to work to set in on the OBC810 cab. I love the oversized volume and gain knobs. Though not numbered, the dial adjustments are 1 to 11. My amp goes past 10 to 11. The power and standby toggles, not being marked on/off , took some internet investigating to determine which way was on/off. Up is power off. Up is standby on. I like that the amp is quiet. No buzzing or fan noise.
The owners manual in the box is 90 pages long. Only the first 5 pages are English. The online version, though lacking, is better than that.
Matched with the Orange OBC810, it is the most colorful, coolest, rare bass rig in my room.
200 watts of tube power in an Orange colored box