My neighbor built this speaker in 1950's, His wife gave it to me when he died many years ago.
The components are the origional hartsfield 150-4C 15" woofer 375 driver and the obvious proper horn lens combination and the 500 Hz crossover.
He obviously didn't stop there, The bottom part of the enclosure is its own seperate rear laoded 18" horn. Since JBL didn't make an 18" then He mounted a EV-18W. In the eighties we replaced the EV with a JBL 18 that had just come out.
on the top sits the JBL C41 Angelus which elegantly added the 075 ring radiator the system.
We last powered this system with two McIntosh Mc75 Amps.
I still have this entire system intact and am just starting to pull this out of my warehouse that is going to be demolished in a few months.What do I do with thiws baby???Montana is a long away from LA.
PS ( I did actually own a Hartsfield in the seventies, the $500 I got for it then helped me get started in my audio business)