Hello, I wanted to introduce some speakers that at least on the Internet very little information is available. They look to be very well built high end 3 way speakers with adjustable mid and tweeter potentiometers. The potis were causing problems so I had to open them up and clean them and took the opportunity to make some pics. Lorenz Acoustics was a sister company of the German Schaub-Lorenz and ITT company. I have some other ITT speakers and can only praise their quality and sound. These speakers are stamped 1979 on the inside.