Jim Lesurf wrote:

More to the point, the original IV limiting using on the 405 was
particularly severe for reactive loads - rather common for loudspeakers!

I could write an article on the subject. I modified one (actually a family) of
my own designs to take account of complaints we had from owners specifically of
one single make/model of loudspeaker. EV SX500 btw.

When I heard it, I was convinced. There was a nasty rasp in the upperish
midrange. When I modelled it I was STUNNED that ANY loudspeaker manufactuere
let alone EV would let loose a speaker with such wild load phase angles.

Graham