1960’s Langevin EQ-252-A Vintage Graphic Equalizers – Matched Pair of 7-Band Inductor Program Passive EQs, Like Altec 9062A Modules (0329 & 0466)

1960’s Langevin EQ-252-A Vintage Graphic Equalizers – Matched Pair of 7-Band Inductor Program Passive EQs, Like Altec 9062A Modules (0329 & 0466)

$7,999.00

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– For your consideration is this matching pair of vintage 1960’s Langevin EQ-252-A Graphic Equalizer units.
– This very clean matched set of two, serial numbers 0329 and 0466, had all 7 respective plug-in inductor modules professionally cleaned and serviced. Both units are in perfect working order. No pigtails are installed, though we can offer installation of matching high-quality XLR cabling free of charge should the buyer request.
– The black anodized face plates are very crisp, with no significant wear or scratches to report. All red Rolo knobs are original examples, some of which exhibit the typical cracks or minor chipping.
– The slot-head control panel screws appear to have been replaced, the units are missing some of their filter module alignment screws, and the units do not include phenolic back plates.
– While famously used in the best recordings studios, the EQ-252-A became synonymous with the Motown sound.
– These are some of the best EQs ever made. They are accurate, organic, and incredibly musical: rendering them incredibly useful as a stereo pair. Whether for a single signal, or for the entire mix, the Langevin EQ-252-A is a must have cornerstone for any recording setup.
– Scroll through the entire gallery to view all 70 images available.

From the Langevin catalog…

7 POSITIONS FOR ULTIMATE CONTROL
OF SPECTRAL QUALITY IN RECORDING, TV-BROADCAST AND MOTION PICTURES

GENERAL

The Langevin Model EQ-252-A Graphic Equalizer fufills the critical need for multiple control at the subjectively important points of the audio range. It employs miniaturized, military quality, gold plated, etched circuitry in each of the 7 plug-in filter units, resulting in a passive assembly requiring no tubes or power supplies. Only input and output connections are required. Sliding Levers permit 8 db of equalization and 8 db of attenuation in 1 db steps at 50, 130, 320, 800, 2000, 5000 and 12,500 eps during the program through noise-free gold-plated switch-ing. Modern controls give quiet operation at -70 up to +24 dbm.

Filter assemblies use sealed toroid coils for hum-free operation. Careful design delivers #½ db accuracy. Overlap from one filter to the next gives combined flat output when levers are in a straight line in any equalized or attenuated position (see curves). Special frequencies are available to order; overlap may or may not provide combined flat output between adjacent positions as the standard frequencies shown have been calculated for this effect. In zero position each or all filters are flat (resistive only, 16 d loss) from input to output. Because all passive circuitry is used there is no distortion when operated up to plus 24 dbm.

Impedance is 600 ohms in and out; for other impedances use Langevin line to line transformers, Model TF-602-C. The model E0-252-A is limited to 600 ohms impedance for the reason that lower impedances would double the size of the equalizer components every time the impedance is halved.

SPECIFICATIONS

Circuit: Bridged T; Impedance: 600/600 ohms; Insertion Loss: 16 db;
Operating Level: -70 to +24 dbm: Positions: 7, with 8 db of equalization and 8 db of attenuation at 50, 130, 320, 800, 2000, 5000 and 12,500 cps in 1 db steps; Distortion: none; Coils: Sealed toroids; Power Requirements: none; Response: See curves; Panel Finish: Black, satin finish, non-halation, anodized aluminum; Terminals: solder type, turret;
Filter Sections: 7 plug-in, printed circuit type; Size: 3½” high bý 10½2* long by 5¾* deep overall.

FEATURES

7- Selected Positions of Variable Hi-Lo Equalization and Attenuation.
Gold plated, Noise-free, Switching through #8 db in 1 db steps during
active use.
Hum-free performance through toroid coils from -70 to +24 dbm.
No tubes or power required —all passive Bridge T circuits in one
integrated unit.
Small size: 3½”‘ x 10½* x 5¾* deep.

ORDERING INFORMATION

Model EQ-252•A Graphic Equalizer equipped with red knobs, complete with mounting hardware and instructions. Weight, net 9 lbs.; 14 Ibs. shipping. Price, Net $475.00.

Recommended Accessories
When lower impedances than 600 ohms are required, use the following matching coils in and out:
Model TF-602-C Line to Line Transformer, Weight, Net, 2¾ Ibs.; 3½ Ibs. shipping. Price, Net, $25.50.
20O:C

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