BillFitzmaurice.info

Someone offered to sell to me 4(?) of these drivers but, I have no id3a what to do with them. How about you?
Here is a link to specs, and a story.
https://vintagetechnologyarchive.com/audio/jbl/d130/

They were state of the art in their day, but their day was 60 years ago. OK for electric guitar, but that's all.

Ha! That explains it! The seller is an 80 year old guitar player.