CTS use to be in Paducha (sp?) Kentucky. Central telephone Service is the old school name.Looks like now they have shifted gears and into minature electronics and Piezo drivers. In 1972 I got my first McGee radio company (Kansas City Mo.)catalog. It was loaded with closeout drivers of all types. I was a kid in a candy store.
One very memorable product was a 15"woofer (CTS) and a compression horn and crossover with the mounting board. All cut out and ready to enclose for !19.95!!!! . The caption stated " Entire speaker system...Cheaper than a Pizza and beer!"
Those were THE good old days.
I would die for an old McGee catalog.....for nastalgia purposes from 1972-1976