I owned a David Brinkley “Gestalt” model preamp. It was an op-amp design with a separate power supply. I met David Brinkley. NOT the newscaster. He lived in the Houston, TX area at the time. The tiny preamp had a phono section with tremendous gain allowing a mmc with no added stage. It was quite good. It also had a single input line stage. It had an innovative bass enhancement but I don’t remember what he called it. I’m thinking “Algebraic Bass.” It imaged beautifully and was extremely quiet.
His preamp was quite good, although not much to look at. I think he was working on a power amp. If you have one of his Gestalt preamps, consider yourself lucky.