What did you do about grills?
The DD-1 was (IIRC) one of the speakers that the new owners of Frazier built after Jack Frazier passed away. It's based on the Monte Carlo, which was a great speaker utilizing a Helmholtz resonator design.
The "post-Jack" Fraziers were hit and miss, starting out just as good, and then deteriorating as the designs got cannibalized for short-term gain.
Maybe Todd Crane will step in with some valid info on the DD-1.
I just found a pair of these. Hey has anyone ever found (or know of anyone) that has a pair of Jack Frazier's Things? (no......not those you sick puppies!)
Todd Crane does not speak highly of the Things. I've never seen a pair.