ask Mark, he runs them.
Horns are ultra efficient drivers. The mounting ***** big time, but once you can find a decent mounting area (90% of the time below the dash), I think most would be happy with the result. Could be a tad loud though.
Oh, and horns can reproduce lower frequencies than a tweeter (i think)
Mark would have a much better explanation to this.
Sony C90, 210 EQ
Seas 27TDF/C, RE XXX 6.5, custom xo (dyn 240GT sitting idle)
RF 60.2 amp
Soundstream picasso 1400.1D
Bass drive-by's are uncool.