Hi People, The search for a tweeter for my 870B has led me to become familiar with this system
Madrid 872a is identical to the speaker system 870B speaker system
The 420Y are the biflex woofer with a tweeter on a strap across the front of the woofer.
The tweeter is a 3" cone paper made by CTS (30685) with a capacitor 6MF
The Santana has the same LF and HF 30685-420A
The Corona used the same HF 30685.
In any case I am searching the tweeter for my 870B or 872A system
I tried the EV T-35, IMHO is bad with the 420Y
Eminence APT-80 mediocre
JVC Ribbon tweeter
I thank the patience they had Zilch with me, again thanks
Here AK photos Madrid 872B