Guys, I'm not getting any closer ... I tried A/Bing them and the Axe sounds different. There's something about the feedback slope. I A/B it with the 2290's pre-amp, just bypassing the delay, so there's no 'oh, but that's the pre-amp!'-thing. The 2290 is really precise and is so good for that rhythmic kind of 'U2' sound, nice and bouncy. It retains the attack and crystal clear sound of the original note, but the Axe, even with the diffusion off, the filters intact ... it just sounds a little more smeared and less percussive. I've picked one LFO, adjusted the modulation, but just couldn't even get close. I inverted the phase on 1 channel, made a little difference, but didn't make it as wide as the 2290 (even without the panning engaged). And yes, I picked the stereo delay in the Axe, not the mono.
I've heard guys say that they have managed to nail that 2290 tone in the Axe-Fx, that it's not that special. Maybe in the II? But in the ULTRA, I will probably need to do a bunch of tweaking to see how close I could get and I don't even know where to start now, seeing as a normal delay block doesn't cut it.
Has anyone actually A/Bed these units? Of course, when you haven't heard it for a while and you sit down, you're more inclined to say; "
Yeah, that sounds like the 2290 I had!"