50kHz and 100kHz along with a SuperTweeter to reproduce ultra sonic frequencies is certainly worth considering.
Exactly how or why they would introduce phase shift down to 1/10th the cutoff frequency isn't revealed or explained.
In any case, why just those frequencies? What about 20kHz cutoff frequency causing a 2kHz phase shift?
Exactly how or why they would introduce phase shift down to 1/10th the cutoff frequency isn't revealed or explained.
In any case, why just those frequencies? What about 20kHz cutoff frequency causing a 2kHz phase shift?