Hi guys
In reference to "on the gig settings" I've only been able to play once live through this setup, at a loud wedding playing various covers from rock to pop to dance/house w/ effects. Rig was the 900 through an AE212 with my LEJ 4 string.
People have had bad experiences with this amp/cab combo, and I knew this before buying. I didn't enjoy my first set, I had the bass knob around 9, with the mids at heaps of different boost (600 and 2.5k) and cut (220 and 600) settings. I enjoyed the tone more with treble down to 9 or 10.
I liked the second set more when I put the bass back up to 10/11. I also stopped playing with the mids, just left them at about 2 (set to 600) It was a rather large bottom end, not as defined as what I'm used to (a GK 1001 RBII through the same cab or epifani UL1 410, with contour boosted high and low mids).
However, I traded definition for "feel", that is, the GK would seem to poke its nose through a bit better, but without a huge pillow down low. The 900 seems to provide a much bigger cushion in between the drums and guitars/keys, without being as clear. The guys in the band liked this, and it made me want to play more longer notes as opposed to more quick fills and trick shots. Interesting side-effect.
Due to the "upward spread of masking" and other psychoacoustic factors I seriously doubt that any set up could provide the pillow and the definition for every player. Certain individuals could say their rigs achieved this, but I doubt most of us would get the same results with their rigs. Make of this what you will.
In short, the AE212 with this head is not a great match if you like defined, clear bass notes with an authoritative but not totally dominant low/low-mid range.It sounds great on its own, but in a band context I missed some of what I was doing. It is workable if you just want to provide a supporting voice to your ensemble and sounded great when I dug in for some of the rock tunes. A bit more grit with a harder attack added to the definition, and the compression was much more noticeable then anything I've heard from my GK, in that the attack with the GB seemed to have more bloom and the GK a much faster attack.
Next time I play in a band (rehearsal tonight then gig in a very different venue on Sunday) I may have more to say. I'll try to remember that I was happier once I stopped fiddling knobs, but it is kinda tempting to do this