Hi Justlisten, about OTL, there are several different OTL output stage designs: single-ended push-pull (SEPP) or circlotron. Fourier was using SEPP design. Atma-sphere, Joule Electra, Graaf are all using circloron output stage.
Fourier is out of business, and a much better one with SEPP output stage design is Transcendent Sound. I am not very familiar with Duntech, but you could call Bruce at Transcendent Sound to discuss about using OTL's with dynamic speakers. Best wishes.
Fourier is out of business, and a much better one with SEPP output stage design is Transcendent Sound. I am not very familiar with Duntech, but you could call Bruce at Transcendent Sound to discuss about using OTL's with dynamic speakers. Best wishes.