Thanks for your response. I would also like to ask you if the
midrange quality of Alpha-based one and two Pi is the same.
I.e. the only change for the passing from one Pi to two Pi is
the benefit of deeper bass ?
I am asking this because in the hifi-line, there is often some
midrange degradation for the largest cones, especially when they
are used with no low-pass crossover (often a huge peaks and
irregularities in the 3-5kHz region, and often not shown on the
driver SPL plot but still audible).

TIA,
O'Tor