EQ-3 Stereo 6-band equalizer with, "air band". Designed to equalize without adding noticeable phase distortion. Originally designed by Cliff Maag, who has gone on to found Maag Audio.
Massive Passive Two channel, four band equalizer, with additional high pass and low pass filters. And, it's a MANLEY!!
8200 A five band parametric EQ designed and manufactured by the engineer who invented the concep, George Massenburg.