A few hours ago at an undisclosed location. Outdoor jam session/charity fundraiser:
Bass player at the edge of the photo is not me, nor is the bass on the stand mine. I brought my P-with-flats (which I got to play for somewhere in the neighborhood of three hours with a variety of folks) and my 8-string (octave course), downtuned J-bass (which I thought would be fun to break out at some point, but timing and tunes were not conducive to it).
Amp is a Handbox R-400. Cabs are a Hathor 1203 (on bottom, with mid-switch up and treble switch down) and a Changeling 112 (on top, with all switches up). Two ports plugged, one open on each cab. Rig is sitting on a Gramma pad, purchased partly with this event (flexy wooden stage) and partly my downstairs neighbors in mind. I'm also running an sFX micro-thumpinator (fixed, low HPF with a steep slope) in the effects loop (with the flexy stage and with headroom in mind).
I had another Hathor in the car -- I've played this event before where it's been super-loud and thought that, particularly with a not-super-powerful amp, it might be a good idea (mine has a factory 2-Ohm mod). Less loud tonight (though volume sure did creep up over the course of five hours).
Tonally, the Handbox works beautifully with the Hathor/Changeling cabs -- sounds and feels great -- but I've been reminded on my last couple of outings with it that it's not a super-powerful amp and that the cabs aren't super-efficient. The last one (before tonight), people were just playing way, way, way too loud. With two cabs, pushed the amp into clipping in a venue I've played with it and ONE cab before without issue.
Tonight was fine -- people got louder than ideal, before the end, but not stupid-loud. The HPF probably helped, tonight (didn't have it last time), and the amp felt fine -- never clipped or felt compressed. Nicely present on stage and folks on stage and in the audience said it sounded great. If I had to guess, I'd say I was running at 70-80% of the amp's "comfortable" capacity.
The person running sound asked me for a feed (which I gave him, pre-EQ) from the amp and said he put "just a little bit" in the modest sub out front to fill out the sound in the audience -- nothing in the tops. (I thought I might have to cover the whole thing with my rig -- which, three years ago, I did).
Backup amp was a Quilter Bass Block, but it never left the case. (On the stupid-loud outing before this one, I spent some time going back and forth between the Quilter and the Handbox -- Quilter will go louder (800 Watts @ 4 Ohms vs. 400 for the Handbox) and sounds and feels good. Handbox, to my ear, sounds and feels better -- more focused, more detailed, more articulate (within its limits), more harmonically interesting -- but 400 Watts is 400 Watts.
Oh, I turned the Changeling's rear-firing mid/high driver up (usually have it down) and asked the percussionist behind me to let me know if it was too much. When I asked him about it, later, he smiled and said, "It sounds great!"