The older Dahlquist speakers of the 70's were an early attempt at time alignment only. They are not and never were phase correct. Even Vandersteen's earliest Model 2's in the 70's were not time and phase correct. Vandersteen, a few years later, introduced phase and time correct speakers of a sort.
I truly believe that current manufacturers today use their argument against time and phase speakers because it would drastically raise the price of their product and hurt their bottom line. I also think it would be too expensive to R&D this design for market. Also, Vandersteen holds patents on his specially designed drivers. It takes years to refine designs.
I truly believe that current manufacturers today use their argument against time and phase speakers because it would drastically raise the price of their product and hurt their bottom line. I also think it would be too expensive to R&D this design for market. Also, Vandersteen holds patents on his specially designed drivers. It takes years to refine designs.