I’ll start by saying that I have no experience with a 400+ or the new Bass 800D. I have no idea how closely, or not, the Sonoran gets to those tones.
With that disclaimer out of the way, this thing sounds glorious. I hear/feel some tube compression, unlike anything I’ve experienced with other tube preamp pedals (various Sushi Box and Super Watt).
The breakup is superb. You can dime the master and use the gain to control the volume and your tone stays clean. Or, do the opposite and get rewarded with some almost crunchy (in a good way!) tube breakup. Or, dial in any level of added harmonic content you want just by playing with the gain and volume. There are no farty tube-like tones here. This IS the sound of Chewbes.
The eq works as you would expect. There is an ever present mid scoop, but oddly it didn’t sound like anything was missing. The switches are definitely a nice touch. They expand the range of tones available with a relatively simple eq. The bass shift is kind of subtle, but the other two (treble shift and bright) are very noticeable and totally usable (yes, I’m looking at you Silver Deluxe).
All that being said, the real star of the show (for me) is the low end. It’s thick. It’s chewy. It has an authoritative presence that fills up a lot of sonic space, yet stays clearly in its own lane.
View attachment 7535989
It also plays really nicely with the Scorpion Deluxe cab sim. I’ll have to try it with the Mini Fridge DI tonight.