Interesting thought John.

First i need some 'sibilant' source material. If anyone has suggestions of better known music and a particular track (or possibly a movie for that matter, our dvd collection is growing) that consistently has the sibilance they find nagging, i can try sitting off axis and do some A/B switching b/w the M40 and M60 to focus on the S sounds.
Keep in mind the M40 does not have a dedicated midrange though so lack of sibilance might be coming from that driver and not the tweeter as so many ppl tend to immediately blame.
It would almost be better if i unhooked all the drivers in each model except for the tweeter and then did some listening for sibilance.



"Those who preach the myths of audio are ignorant of truth."