Wow!Yes efficient 90db like many Wilson’s, but a right b***h of a load like most them also, EPDR (impedance + phase angle) down to 0.9ohm!!! in the bass.
The Wilson Alexia’s get into areas of the Kappa 9’s for difficult to drive?
Did not know that, thought all Wilson’s were very efficient speakers.
OTL’s will drive them, and pigs might fly!! What was that Supertramp track? oh yes "Dreamer"
Absolute Sounds Alexia measurements for HiFi Review https://ibb.co/YWSSXPX
Stereophile measurments on the Wilson WP8’s https://ibb.co/LpTPmXt
" " " " Wilson Alexx https://ibb.co/nbGFGtB
" " " Wilson Sabrina https://ibb.co/8Kg5hJv
Cheers George