Probably not a lot to go by, but they have lead, bass, slide, fiddle, keys, and drums, and their footprint is very small. Probably somewhere around 30 feet, give or take. Part of that might be the venues, but they seem to stay tight even when they have more room. Amps are behind each of the strings, but usually the keys amp is forward. Slide, violin, and lead across the front, keys to the outside a little behind the slide. Bass and drums at the back.
I guess I was wondering if you meant a 30 inch split or a 20 foot split on the subs.