line seperating mid range and high end?

[E-Stat]

sacd will probably be the HD cd, if it surrives.

It already is.

...as for shrinking woofers, this comes from the advent of the sub.

I think it has more to do with WAF and the rise of HT. Even large Revel models that do first octave bass employ an array of small woofers and have a narrow cabinet.

The original idea was that bass coming out of the speaker muddied the midrange somehow, with a seperate sub you get better midrange, THAT is the theory anyway.

Interesting. Never heard that theory advanced.

rw