Altec Lansing 9062A passive graphic equalizer by John Eppstein
This is one of the great vintage passive equalizers. It is the basic unit that the legendary Motown mastering EQ was derived from according to Bob Ohlson. This is also the same device marketed by the original Langevin company as the Model 251 EQ.
It is a very simple unit, incorporating seven linear switch controls at 1.5 octave centers. Each band allows +/- 8 dB of control, and bands are interactive, giving very smooth curves for 2-buss and mastering applications. the massive linear switches give an exact 1dB of gain change per position, making it ideal for mastering. Since it is a totally passive device it requires an external preamp to make up the 16 dB insertion loss. Any quality stereo mic pre will suffice.
Action is very subtle and extremely musical. As cut and boost is only 8dB/octave you won't notice any extreme changes. That's not what it's for. Using it on the 2 buss in a mix it can enhance the presence and brightness without exaggerating the obnoxious qualities of a sibilant vocal. It's really quite magical.
Build quality is unbelievable. Military tanks are not built as strongly as this. You really have to see one to believe it.
Each EQ band is a separate module connected to a backplane with extremely beefy gold clad connectors. The inductor coils in each module (2 each) weigh several ounces each - these are all highest quality air core inductors, no crappy ferrite or iron core inductors here.
The improvement these have provided to my 2-buss cannot be overstated. If you have a chance to pick up a pair do not hesitate.