soundguruman :
Class A is a type of amplifier, not a speaker.
Speakers are not rated that way, only amplifiers.
Stereophile is a magazine and they have a list of what is called "recommended components" divided into Class A, B, C, and D, with categories for speakers, subwoofers, and electronics.
For speakers:
Class A is predominantly over $5k bookshelf speakers $10k floorstanders; high end Dynaudios, Revels, etc, although a few lower priced speakers like the Usher Be-718 ($2795) managed to sneak in.
Class B are midrange speakers, usually under $10k floorstanders, under $4k and under bookshelf speakers, although there are some expensive designs that don't make the cut.
Class C are typically high performi♦ng budget ($2k and under) speakers.
MEgamer :
i thought most A. subwoofers are class D anyway
I believe most subs are Class A/B still. BASH is one of the popular cheap class D amps they use in a lot of HT subs these days, but it's plagued with reliability and sound quality issues, which is why you don't really see it in anything but extreme budget subs.