Quote Originally Posted by Alien_Shore View Post
I'm curious, what is the part number for those "lightweight" frams? All the doc that I can find only mentions 34647 as the replacement part for 902s...

Also, has anyone done an A/B compare of the GPA 902 and the 902 with the original lightweight fram?
The vast majority of 902-8A's were originally equipped with Altec 34647 diaphragms. That was the original "stock" part for those drivers. It's the same 34647 diaphragm that GPA manufactures today. So your drivers do appear to have their original diaphragms still installed (same as mine). From what I've heard, some of the very first 902-8A's may have come with the "light" diaphragm that was the "stock" diaphragm for the 802-8G drivers. That was an Altec 23744 diaphragm.