@Cher
Probably best to post in "garage sale" area on the forum...
Here's a few pics for those that are unfamiliar
One interesting note...the drivers are all Bozak proprietary and very interesting construction techniques for the day...Rudy Bozak was a contemporary to Paul Klipsch...although maybe had different design philosophies...LOL
I have several D-75s. I bought them for less than $150. each. I have used them with khorns and lascalas...I don't think there is anything better for the price for heritage; dead silent, XLR inputs and gain control...perfect for bi-amping. Yes my expensive tube stuff sounds better.