I haven't actually tried either of them, cassp, except for the eon10 which i now use. since most are familiar with jbl, i was wondering if any have tried either of the others and could offer comparison. I'm sure the hartke km100 has it over the km60, but it weighs a ton..in fact the hartke 60 was a pretty hefty lift for me, the kc350 seemed to be much lighter...lighter than the jbl as well. I'm wondering also why the hartke costs less than the roland, when it seems to be more solidly constructed, has that aluminum spkr.and more controls.