Chris
pfm Member
The only off-the-shelf driver that I can think of that can be run without a crossover is the Seas A26 - http://www.seas.no/index.php?option=com_content&view=article&id=475:seas-a26-kit&catid=66:seas-d.
For some reason Comeau didn’t see fit to use the Seas mid-woofer without its filter in his WD25 rethink of the A26. I’m sure he explained why in his articles or on his forum but I wouldn’t have understood it anyway.