A Brownface Deluxe preamp. A bias tremolo. One pedal. Except you have to do the preamp but the trem is optional and honestly if they were going to force that kind of choice, it would be better in the opposite configuration. I guess Origin Effects sees their place in the world as emulating these great old amplifiers, so I get why it’s the way it is.
I don’t really care for this pedal, but it’s so well done that I feel like I’ll regret getting rid of it.