Manley Langevin Dual Mono Mic Pre #004 (Used)

Dual-channel mono mic preamplifier
Manley Langevin Dual Mono Mic Pre #004 (Used)
Manley Langevin Dual Mono Mic Pre #004 (Used) Manley Langevin Dual Mono Mic Pre #004 (Used) 2 Manley Langevin Dual Mono Mic Pre #004 (Used) 3
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The Manley Langevin Dual Mono Mic Pre is our refined version of the historic Langevin AM-4 console channel. We developed our own discrete gain stage to provide for balanced outputs to bring the Langevin brand into the modern age while still retaining that desirable tone that discrete circuitry delivers. No IC's in this unit, please! We also added 1/4" DIRECT INPUTS addressable from the rear panel. The continuously variable plus and minus 10dB shelf EQ's switched turnover points have been chosen carefully at 40 or 80Hz (L.F.) and 8 or 12KHz (H.F.). All EQ can be completely switched out or set to 'flat' positions. Up to 53dB of gain is available to accommodate a wide range of microphones and high-current 48 volt phantom powering is built in. Because the most single influential component in a mic pre has to be the input transformer, this unit features our precision MANLEY mic input transformers which are wound right here in our factory, for that natural sound with a touch of brawn good iron provides.

The Langevin Dual Vocal Combo is a 2 channel microphone preamplifier with 2 shelf equalizers plus 2 channels of electro-optical limiters. This includes VU meters, individual phantom power, limiter linking and time proven circuitry. This is an ideal box for musicians and engineers on a budget and is equally at home in a big league studio, mobile recording truck, or live gig. It has the reliability, functionality, and the sound without the any of the complexity– the essential features without the "sea of knobs."

The Mic Preamps are transformer coupled (hand wound by Manley Labs) with 50 dB of gain provided by pure discrete transistor circuits, same as found in the stand-alone Langevin Dual Micpre. 48 volt phantom power can be applied to each input XLR independently and the switches are a locking type to prevent accidents. New to this unit are the front panel 1/4" Direct Instrument inputs. A new little discrete circuit gives these inputs an appropriate input impedance (150Kohms) and provides about 40 dB of gain.

The Equalizers are comprised of a low frequency shelf that can be switched to either 40 Hz or 80 Hz and a high frequency shelf that can be set for 8 KHz or 12 KHz. Very tasty choices! These shelves are continuously variable from -10 dB to +10 dB of gain. Of course, the EQ can be completely switched out with the BYPASS switch making it easy to make a choice.

The Limiters are the discrete transistor version of the Manley ELOP® Limiter (same as the Langevin stand-alone version). This type of limiter is superb for vocals and a wide range of instruments from basses and guitars to synths and room mics. When it comes to tracking and fast set-ups, the lack of a multitude of controls is a real feature. You can simply set up the Threshold and Gain controls and expect that the limiter will do the right thing without a lot of tweaking. The Limiters have Threshold and (make-up) Gain controls, a Link switch for stereo and a pair of toggles that switch the VU meters to "Gain Reduction" or "Output Level". These are true stereo limiters without the usual problems of left/right matching common to other stereo opto based limiters.

The back panel has XLR mic inputs paralleled with 1/4" TRS jacks that feed the mic pre stage. By popular request we have added separate 1/4" TRS micpre outputs which "normal" into the 1/4" TRS limiter inputs so they can be permanently wired into a patchbay. Now there are "Direct Outputs" from the Mic Pre/EQ stage so one can indeed use the micpreamps and the Limiters as 4 separate sections. The main outputs are available as either transformerless balanced XLR or unbalanced 1/4" Tip-Sleeve jacks. The solid 14 lb. 2U chassis is 19" x 3 1/2" x 10" and sports a billet 1/4" thick machined faceplate.


  • Frequency Response: ±0 dB 10 Hz to 20 KHz
  • <0.05% THD @ 1Khz
  • S/N Ratio: 103dB
  • Gain: 38 dB to 53 dB (adjustable)
  • Mic Input Impedance: 2400 ohm
  • DIRECT Input Impedance: 150K UNBALANCED 1/4"
  • Output Impedance: 11 ohm XLR; 6 ohm 1/4" output
  • Maximum Output: +31dBv (75 volts peak-to-peak)
  • Input Sensitivity @ 1KHz (45 dB gain setting): 55 mV

Additional Information

Condition Used / Vintage

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