420b's

[analog addict]

My bad. I think you are right, but won't guarantee empty boxes weren't sitting around and stuffed later...have seen enough weirdness to be careful about absolutes. But have never seen a Madrid with 420B. only 420A. to be technical, 420-Z.

Hmmmm....I have a pair of 872Bs, my first Altecs/first hit of crack in fact. I could swear that they are the newer style frame without the integral tweeter.....