I've never been 100% happy with my rhythm tone. I always figured it was something to do with the SM57, because it always sounded very notched and narrow and filtered whenever I used one. I'd finally started to get sounds I liked out of the Nomad, but then I had a change of heart and went for a Rect-o-verb, and I was back to square one. The combination of a RSM-4 and a SM57 seemed to work pretty well on that amp, but it was a pain in the ass to dial in right, so I still wasn't really happy.
Then I grabbed a Roadster, and almost immediately was getting rhythm sounds I was 90% happy with. I couldn't figure out why for the longest time - I figured at first that part of it was just that it records better than the Rectoverb (which I still suspect is true to a point - it's darker, which I like).
However, a couple days ago I finally figured out what I was doing differently. Traditionally, I've always mic'd with a SM57 slightly off the grill - within the 2" band where you get a certain amount of proximity effect, but generally a little bit off. However, when I started micing up the Roadster, I was putting the mic right up against the grill.
I'm such a moron sometimes. I'm guessing I was getting some phasing from the room sound with the mic a little further back or something. Whatever the case, I'm still fine-tuning position but a single mic right up on the grill is both WAY less position sensitive than if it were an inch off, and is giving me tones that are 90% there right off the bat.
Just thought you guys would find this funny.
(I'm still not happy with the SM57 or the i5 for leads, bTW - I'm still using that Nady RSM-4, which just slays on a Rectifier for solo work).