Thanks 2x6, but that's part of my question. The EP350 does have internal cross-over... but only at presets of 80Hz and 150Hz, whereas the EP500 has cross-over presets of 40/60/80/100/150Hz. I'm wondering if at 80Hz cross-over on the EP350, there will be a good blend with the M3 speakers... or if I'd really need a cross-over of 40 or 60Hz for the M3 speakers.