Okay, I bought the plans today, and so now I can appreciate at least SOME of what Steve did:  used the cubic space of the cabinet more efficiently (no dead space), made the horn bigger, esp. the mouth, and of course made it sturdier.

And I read that he made it to be less driver-sensitive than the original ones.

I have two questions:  

*do all drivers that work well in the original Jensen work as well (or better) in the Decware Imp?

*the new one is designed for 2 15's.  Does the space behind the driver need to be reduced to use with 1?

I guess that's it. I am REALLY enjoying listening to my old Jensen cabs with Tannoy Golds (1 15" per cab), and wondering about better braced cabs with a bigger mouth...