I'm looking at getting a quad of these to use as switchable bipole/dipole surrounds, a task they should be excellently suited to. Has anyone used them in such a capacity? I'd have to source the 12" faceplates ('cause they're cool) or build them out which would be a pain, but I think it'd be pretty hard to beat these, 2 per cab, in an application like that. I'd run them sealed since as surrounds I don't need <80hz out of 'em.