Okay, how about this. A pro-audio style sub for the horn crowd? Strong single slug motor & a light weight cone? Something with a shallow mounting depth. Fi has the sealed and ported box crowd covered, with the Q and the SSD. The IB crowed is as happy as they can be with the IB2 & IB3. What about the horn people. The folks at DIYAudio seem to be into this Tapped Horn setup. Me, I'm thinking about trying it. So how about it?