Good morning, Can one of you guru's tell the audience the difference between the a & b model AND I have a pair of 4333A's supposedly out of Peter Frampton's Westchester County studio. (although I have no paperwork to prove it, maybe I can get him to sign them someday, that's a good story! ). Anyway, Rolf, Guido, what mods can be done to the crossovers to "make em' better?". I've searched this site hi & lo and am coming up without an answer. I am by no means an electronic fix it, tune up guy, the best I can muster would be tinning wire . I could however remove them for an upgrade and send them out. PM me with that kind of info please or post here.

Thx, Steve