http://thehistoryofrecording.com/Mag...DB-1982-08.pdf
Page 48 of db magazine, August 1982
Product announcement:
"Cetec Gauss has recently introduced a line of studio (control room) monitors to compliment its line of studio monitors. The Model 7351 monitor system offers superior discrete sourcing and higher audio output. The components of the 7351 are blended by using the concept of acoustic crossover, which dictates unconventional crossover points (160 hz to 1400 hz) in order to attain a smooth and transient response. The 7351 delivers a full 35 hz to 18 khz power response and uses a 2080 compression driver on a constant directivity horn with power compensation built into the crossover network."
I typed this out verbatim, including the awkward grammar. There's a couple of pics showing with and without grille. Obviously, this is the one with a crossover built in for the mid and HF.