Its a very interesting read but because of my loss of my wife and age (I hate admitting that last part) it takes me multiple reads to retain the points being made in the book. I also only read a couple of sections at a time and let my mind process what I've read for a few days so that I can retain and understand more fully what it is I read.
Thinks I've learned so far..
The phantom center channel that we hear in rock, pop, and jazz recordings are often sweetened by the recording engineer to lessen the comb filtering and the corresponding reduction of amplitude as a result in the vicinity of 2KHz. This comb filtering would also cause a shift in timbre and these effects are exacerbated in rooms with low first reflection points or narrow dispersion loudspeakers even though these speakers may have uniform off axes response. Speakers with wide dispersion characteristics, even those with non uniform off axes response are preferred to speakers with narrow dispersion and uniform off axes response.
Auditioning 1 speaker in a speaker pair reveals more subjective information about that model's performance than it does as a stereo pair.
That's as far as I got today.