I can be as much of a crotchety old man as anyone... but WTF is up with these trolls following every single post with an attack?
Actually, it's usually only
mediocre commercial passives that quote +/- 3dB specs... professional monitors are almost always more linear than that as are quite a few in the higher-end of consumer audio. A great many speakers that I'm interested in post specs that are +/- 1.5dB or similar... still others specify both sides independently (i.e. +1dB/-3dB) in reference to their sensitivity rating.
Then again it's just another ignorant rhetorical perhaps.
From the specs for Revel Ultima2 Salon2 (enough 2's Revel?):
And from Neumann it's broken down a little differently (
KH 120 A G):