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. There are also separate 1/4" TRS micpre outputs which "normal" into the 1/4" TRS limiter inputs so they can be permanently wired into a patchbay. There are "Direct Outputs" from the Mic Pre/EQ stage so one can indeed use the micpreamps and the Limiters as four 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.

SPECIFICATIONS

Mic Pre and EQ Section

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

Electro-Optical Limiter Section

• All-Discrete audio path
• Balanced XLR inputs & outputs
• Unbalanced 1/4" inputs & outputs
• Silent conductive plastic input attenuators
• Gain Reduction controls
• Bypass switches
• Sifam VU Meters
• Meters switch to read output or reduction
• Stereo link switch
• <0.04% THD @1Khz
• Gain: -2 dB to 12 dB (adjustable)

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Langevin Dual Vocal Combo Manual Adobe pdf