You have a cool Dad..I bought a pair in 1977 and installed them in my 1972 Olds 442.. they where considered bad ass speakers for that timeEverytime I install modern stereo components, my father tells me stories of his audio systems back in the day, circa late 70's. Although the cars change in each story, he always mentions "Mind Blower" speakers. He said they were 6x9 speakers with thier own amps mounted to them. I did some research ad found out they were made by Pyramid. I would really like to get my hands on a set and surprise him on a future restoration project. Plus, I'd love to look at and hear these things. Anyone know where I might find some, or any other info about them?