Manley LANGEVIN ALL-DISCRETE User Manual

OWNER'S MANUAL

LANGEVIN

ALL-DISCRETE PULTEC

EQP1-A TYPE EQUALIZER

MANLEY

LABORATORIES, INC.

MANUFACTURED BY

MANLEY LABORATORIES, INC.

13880 MAGNOLIA AVE.

CHINO, CA. 91710

TEL: [phone]

FAX: [phone]

email: [e-mail]

http://www.manleylabs.com

CONTENTS

SECTION PAGE

INTRODUCTION 3

MAINS CONNECTIONS 4

OPERATION 5

CONNECTIONS 6

FRONT PANEL 7

REAR PANEL 8

SERVICE 9

SPECIFICATIONS 10

WARRANTY 11

WARRANTY REGISTRATION 12

APPENDIX "1" WIRING YOUR OWN CABLES

INTRODUCTION

THANK YOU!...

for choosing the Langevin All-discrete Pultec Type Equalizer. The Langevin Pultec Equalizer utilizes the original
WESTERN ELECTRIC passive-equalization circuit found in the long-out-of-production and justifiably famous
PULTECS. It is also the exact EQ section found in our MANLEY Enhanced Pultec EQ, the difference being that
the Manley unit uses and all-tube make up gain amplifier while the Langevin employs an all discrete make up gain
amplifying circuit. Our versions of this classic EQ incorporates superior modern components with our proven line­amp superiority for absolute sonic cleanliness... Conductive plastic potentiometers and sealed gold-contact
switches, polystyrene and rolled film and foil capacitors, precision 1% metal-film resistors (no cheap carbon
resistors here!), solid, rugged, servicable, yet handsome metal and chassis work, combine with a cleverly regulated

power supply and state-of-the-art solid state circuitry to bring the PULTEC into the nineties and beyond....

You have purchased our Rev. B version which now features all-discrete balanced inputs and outputs as well as
additional unbalanced inputs and outputs. All inputs and outputs are protected against shorted terminations. The
headroom and noise floor of this unit have been greatly improved over our early units.

Please take a few moments to read through this manual carefully as it contains information essential to proper
operation of this unit.

Thank you again, and please enjoy!

GENERAL NOTES

LOCATION & VENTILATION

The Langevin Pultec Type EQ must be installed in a stable location with ample ventilation. It is recommended,
if this unit is rack mounted, that you allow enough clearance on the top and bottom of the unit such that constant
movement of air can flow through the ventilation holes.

WATER & MOISTURE

As with any electrical equipment, this equipment should not be used near water or moisture. If liquid enters the
unit, it should be returned to your dealer for servicing.

SERVICING

The user should not attempt to service this unit beyond that described in the owner's manual. Refer all servicing
to Manley Laboratories.

WARNING!

!

TO PREVENT THE RISK OF ELECTRIC SHOCK

DO NOT OPEN THE CABINET

REFER SERVICING TO

QUALIFIED PERSONNEL

3

MAINS CONNECTIONS

Your Pultec 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.

Export units for certain markets have a moulded mains plug fitted to comply with local requirements.
If your unit does not have a plug fitted the coloured wires should be connected to the appropriate plug
terminals in accordance with the following code.

GREEN/YELLOW EARTH terminal
BLUE NEUTRAL terminal
BROWN LIVE terminal

As the colours of the wires in the mains lead may not correspond with the coloured marking
identifying the terminals in your plug proceed as follows;

The wire which is coloured GREEN/YELLOW must be connected to the terminal in the plug which
is marked by the letter E or by the safety earth symbol or coloured GREEN or GREEN and
YELLOW.

The wire which is coloured BLUE must be connected to the terminal in the plug which is marked
by the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the terminal in the plug which is marked
by the letter L or coloured RED.

DO NOT CONNECT/SWITCH ON THE MAINS SUPPLY UNTIL ALL OTHER

CONNECTIONS HAVE BEEN MADE.

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