Hi Guys, Thanks, My first post.

Hello to all the members of this forum, I acquired old cabins altec, the reference is 870B Speaker System, Serial 892, Number 391916, AL75. The woofer is 420Y. somebody could give me the technical specifications of the same ones, I have connected them to a Set 2A3,300B and 45. I build my set amps. I have thought to connect to along with tweeter Electro Voice TW35 wolverine using theC36 crossover EV 3500Hz, some suggestion for this project. Thanks, Martin