I haven't heard the MFW-15, but according to Craigsub, ONE MFW-15 outperforms ONE EP500. Now I have no clue what size of room was used for this testing. And these were not double blind tests, they are ranked against another sub (I forget which one) and that sub is the base for all other subs. If other subs out perform that sub, they get a higher ranking, if they under perform, they get a lower ranking.
No doubt the EP500 is a fine sub, and can certainly play to higher volumes than the MFW-15 (because of the 500 watt amp).
