OWNER'S MANUAL LANGEVIN DUAL MONO MICROPHONE PREAMPLIFIER WITH EQ MANLEY LABORATORIES, INC. MANUFACTURED BY: MANLEY LABORATORIES, INC. 13880 MAGNOLIA AVE. CHINO, CA. 91710 USA TEL: (909) 627-4256 FAX: (909) 628-2482 email:emanley@netcom.com http://www.manleylabs.
CONTENTS SECTION PAGE INTRODUCTION 3 MAINS CONNECTIONS 4 BASICS 5 CONNECTING YOUR PREAMPLIFIER 6 FRONT PANEL 8 REAR PANEL 9 TECH NOTES 10 SPECIFICATIONS 11 WARRANTY 12 WARRANTY REGISTRATION 13 APPENDIX A: WIRING YOUR OWN CABLES APPENDIX B: TEMPLATE FOR STORING SETTINGS
INTRODUCTION THANK YOU!... for choosing the Langevin Dual Mono Microphone Preamplifier. Manley Labs bought all the rights to the Langevin name and circuits in 1992. Manley Labs uses the Langevin name for its solid state products including versions of an all discrete Pultec and Electro-Optical Limiter, as well as, other high performance non-tube products. This Mic Preamplifier uses an all discrete transistor audio path that simply sounds pretty damn good.
MAINS CONNECTIONS Your unit has been factory set to the correct mains voltage for your country. The voltage setting is marked on the serial badge, located on the rear panel. Check that this complies with your local supply. The voltage changeover switch is located inside the unit in the middle of the PCB near the power transformer. To change the voltage from 120 to 240 volts, simply remove the top cover by unscrewing the center fixing screw and sliding the top out towards the rear of the chassis.
BASICS This Microphone Preamp, like most mic preamps, is pretty easy to use. First we can discuss why outboard mic pre's have become "a must have item" in almost every studio even though your console probably has a bunch of them and that manufacturer claims that they are really great and you don't need outboard mic pre's. Then, why is everybody buying them, using them, and why are most people going back to tubes or vintage transistor based circuits? Good question.
CONNECTING YOUR PREAMPLIFIER Easy - Connect the mic to the Microphone Input XLR, then connect the Line Output to your tape machine or console. Read on, there are some things to consider. On the back panel are female XLR's labelled MIC INPUT A and MIC INPUT B. The signal from the MICROPHONES get plugged in here. Here are a few warnings and suggestions. These XLR connectors also "send" PHANTOM POWER to the mics. Some mics can be damaged by the 48 volts of phantom power.
Reversing the polarity or phase is often needed when two or more mics are picking up the same source. For example it would be needed when one mics the top and bottom of a snare - one skin is going towards one mic and the other skin is going away from the other mic. If one signal is not "reversed" then you lose lows. Polarity reverse can also help with some vocal / mic / headphone situations because " somewhere " the polarity flipped one too many times. It happens.
FRONT PHANTOM 48V INPUT 80 Hz ATTENUATE 40 Hz A B L.F. -10 EQ IN +10 EQ OUT C D H.F. -10 PANEL POWER PHANTOM 48V 80 Hz 12 KHz +10 E 8 KHz DISCRETE DUAL MONO MICROPHONE PREAMPLIFIER F G I J 40 Hz K L.F. -10 EQ IN +10 EQ OUT L M H.F. -10 12 KHz +10 N 8 KHz O INPUT ATTENUATE P A&P INPUT ATTENUATE This is the input level for the microphone signal. The best setting is achieved by watching the meters of the recording machine as you adjust this control.
REAR PANEL A B C D E F G H I A INSTRUMENT INPUT Optimised for Synths and drum machines but not for guitars or basses. Use a regular "DI" into the MIC INPUT for guitars and basses. Use only the instrument input or MIC INPUT but not both at the same time. B INPUT XLR (Right Channel) Balanced XLR input. PINOUT: Pin 1 Ground Pin 2 POSITIVE going phase (+) Pin 3 NEGATIVE going phase (-) C OUTPUT XLR (Right Channel) Balanced XLR output.
TECH NOTES PHANTOM POWER FUSE In earlier sections we explained most of the possible small disasters that can happen when phantom power is used. The big one is damage to other gear not designed for phantom. This includes old ribbon mics, non-pro battery powered mics and possibly other things we have yet to hear about. FOUR reasonable rules: 1) Most modern mics with 3 pin XLR connectors will be safe and there is no need to worry unless you own some exotic or real cheap mics.
SPECIFICATIONS Frequency Response 10 Hz to 20 KHz (+/- 1 dB) THD & Noise .
WARRANTY All Manley Laboratories equipment is covered by a limited warranty against defects in materials and workmanship for a period of 90 days from date of purchase to the original purchaser only. A further optional limited 5 year transferrable warranty is available upon proper registration of ownership within 30 days of date of first purchase.
WARRANTY REGISTRATION We ask, grovel and beg that you please fill out this registration form and send the bottom half to: MANLEY LABORATORIES REGISTRATION DEPARTMENT 13880 MAGNOLIA AVE. CHINO CA, 91710 USA Or you may FAX this form in to: +1 (909) 628-2482 or you may fill in the online warranty registration form found in the Tech Support section of our website www.manleylabs.
