|The EMI TG12412 was first introduced to the recording world around 1972 when Abbey Road installed the first TG12410 Transfer (or mastering) Desks. This equalizer is deeply rooted in the tradition of EMI eqs started in 1954 with the RS56, and continued with the TG12345 in 1969, and finally the TG12412 in 1972.
The eq has 20 selections on the four bands as well as five shapes per band. Shelf low, blunt, medium, and sharp bell curves, and shelf high. One of the interesting and highly prized uses of the TG12412 is the shelf high and shelf low settings. On each band you can choose to shelf up or down on any frequency and this is an often used trick of Abbey Road mastering engineers through the years. Another interesting feature is that all eq points are based on the note C and are spaced in half and third octaves based on that. It is thought that this is part of the totally musical sound of the equalizer.