Emil,
I have both the Rev.B on the Tannoy system & an Uber on the K-horn system. The Rev. B is no slouch and is great! (you already know that).
The Uber is just "mo' better"... a little more filtration, a bit more dynamic... a bit more better in every aspect...
Dave obviously can describe it better... Dave can you comment on the differences between your two great products?
Happy Father's Day all,
Pete