Manley NU MU, Owner'S Manual

Page 1: ...ATTACK ST E R EO L I M I T E R CO M P R E S S O R 3dB 3dB dB 0 HIP GR METER OUTPUT HP SC INPUT LEVEL V U 710 CHANNEL 1 CHANNEL 2 INPUT 2 INPUT OUTPUT 2 OUTPUT 1 INSERT 2 INSERT 1 u OR VACUUM TUBE STEREO LIMITER COMPRESSOR n u u m n u u m TM OWNER S MANUAL ...

Page 2: ...n This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turnin...

Page 3: ...ucts shall be considered a warranty by Manley Laboratories Inc for any purpose or give rise to any liability of Manley Laboratories Inc 2016 COPYRIGHT Manley Laboratories Inc All rights reserved This manual and any associated artwork product designs and design concepts are subject to copyright protection No part of this document may be reproduced in any form without prior written permission of Man...

Page 4: ... attempt to service the unit beyond that described in the operating instructions All other servicing should be referred to qualified service personnel This unit has high voltages present even after the power has been switched off 8 DO NOT connect the AC supply cord until all other connections have been made Afer initial power up the VU Meter will blink for thirty seconds The unit remains in MUTE u...

Page 5: ...ER The Large custom VU meters allow easy tracking of both channels with the Nu Mu It shows the amount of gain reduction in dB from the 0 dB mark when the switch 7 is set to REDUCTION When this switch is selected to O P and illuminated the meter measures the output in decibels Note VU meters and PEAK meters rarely agree digital recorders usually use peak meters Rely on those for a precisie recordin...

Page 6: ...R SWITCH The Power Switch glows a soft blue color when an IEC power lead is connected to the unit This indicates that the Nu Mu is in STANDBY mode Engaging the power switch takes the Nu Mu out of standby mode and into warm up mode The power switch will illuminate to a brighter blue and the backlit VU meters will start to flash This warm up process last 30 seconds after which the MUTE relays will l...

Page 7: ...S 1 4 jack interrupts the connection to the input drive of the side chain of Channel 2 allowing external gear to be inserted to trigger the side chain circuitry The pinout is TIP SEND RING RETURN SLEEVE GROUND MANLEY LABORATORIES INC 13880 MAGNOLIA AVE CHINO CA 91710 PHONE 1 909 627 4256 service manleylabs com www manley com HAND CRAFTED IN THE USA MAINS VOLTAGE SHOWN ON SERIAL TAG WARNING TO REDU...

Page 8: ...compressing the signal even if the controls aren t quite set right You can get the Manley Sound without excessive compression The cleanest settings are easiest to set up and most recommended for mixes Set the THRESHOLD near MIN set the ATTACK near FAST and adjust the INPUT for 2 to 4 dB of LIMITING then adjust the OUTPUTS to reach the levels you want or by comparing with BYPASS You can fine tune t...

Page 9: ...NG OR COMPRESSION Two basic rules of thumb with any compressor or limiter should be reminded Typical amounts of gain reduction shown by GR meter should be 2 to 6 dB The more that the needle swings the more likely the gain changes will be audible Listen for objectionable pumping with fast settings Use your ears to determine optimum settings more than the meters Some limiters add unpleasant artifact...

Page 10: ...s trick when two tracks are stepping on each other and EQ isn t making enough room for clarity Trick 4 Drive the compressor from an AUX send and return it to a channel Once you have some limiting carefully turn up that aux send on the return channel to feed back into the limiter Watch out for real howling feedback and over the top limiting If you are lucky it won t scream during the quiet parts Th...

Page 11: ...imply from the rack All the other gear in the rack is dumping ground noise onto the rack rails Try removing the Nu Mu from the rack so that it is not 7 Questions Troubleshooting touching any metal You may have cured a non loop hum Some gear radiates a magnetic field and some gear especially if it has transformers might receive that hum Method 3 Another method of reducing all sorts of hum and noise...

Page 12: ...equire calibration after a tube change Consult the Manley website or contact us for the calibration procedure required after a tube change GROUND LIFT JUMPER If necessary the Circuit Ground can be disconnected from the Chassis Ground This practice is usually required if hum loops cannot be cured in any other way Removing both jumpers JP6 will break the chassis signal ground PSU FUSE The PSU fuse i...

Page 13: ...t only after changing 6BA6 tubes This trimmer adjusts internal balance and trims for the lowest distortion This balance sets the relative gains of the 2 halves of a differential circuit matched pair 6BA6 lowest distortion thumps THIS IS NOT LEFT RIGHT BALANCE 1 Set a multi meter to read DC volts on its lowest scale expect a very small voltage reading 1 0VDC 2 Adjust one channel at a time 3 This is...

Page 14: ...ain outputs 4 Meter switch set to OUTPUT 5 L CH VR13 adjust to set Left meter to read 0 VU 6 R CH VR14 adjust to set Right meter to read 0 VU METER GR ADJUST This trimmer calibrates VU meter gain reduction read to match actual audio gain reduction at the main output 1 Set Meter to OUTPUT 2 Confirm VU meter reads 0 VU 3 Adjust the threshold controls ccw for a gain reduction of 2dB Meter drops to th...

Page 15: ... match stereo VU meter assemblies to obtain the best possible tracking loudness PPM The VU meter was not designed to measure signal but to let users target a signal level of 0 VU sometimes labeled 100 so it is not important that the device is non linear and not precise at low levels The VU meter intentionally slows measurement averaging out peaks and troughs of short duration and reflects more of ...

Page 16: ...r passages Ÿ Large Illuminated Stereo VU meters Reads Output level or Gain reduction Ÿ Sidechain INSERT Insert point for limiter compressor sidechain Two Stereo Phone Jacks TIP Send RING Return SLEEVE ground Ÿ For Unity Gain set Input level switch to 0 and Output control to 11 O clock Input source Z 150 Ohms Output load Z 100k Ohms Ÿ Maximum Input level 1 kHz Sine 0 3 THD N Ÿ 3 25 dBu Ÿ 0 21 dBu Ÿ...

Page 17: ...m OUTPUT THRESHOLD MIN MAX SLOW SLOW FAST FAST RECOVERY ATTACK H A N D C R A F T E D I N C A L I FO R N I A U S A COMPRESS IN LINK 3dB 3dB dB 0 INPUT LEVEL OUTPUT THRESHOLD MIN SLOW FAST MAX SLOW FAST RECOVERY ATTACK S T E R EO L I M I T E R C O M P R E S S O R 3dB 3dB dB 0 HIP GR METER OUTPUT HP SC INPUT LEVEL V U LIMIT BYPASS n u u m OUTPUT THRESHOLD MIN MAX SLOW SLOW FAST FAST RECOVERY ATTACK H...

Page 18: ... ON SERIAL TAG WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN REFER SERVICING TO QUALIFIED PERSONNEL ONLY n u u m STEREO LIMITER COMPRESSO XLR PIN 1 SHIELD GROUND PIN 2 POSITIVE PHASE PIN 3 NEGATIVE PHASE PIN CONNECTIONS 1 4 JACK TIP SEND RING RETURN SLEEVE GROUND SERIAL No Rev 1 3 ZF 2017 Designed Handcra...