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Manley NU MU Owner's Manual

Vacuum tube stereo limiter / compressor
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V U
OR
710
INPUT
LEVEL
n u
n u
VACUUM TUBE STEREO LIMITER / COMPRESSOR
CHANNEL 2
INPUT 2
OUTPUT 2
THRESHOLD
HIP
METER
OUTPUT
MIN
+3dB
0
dB
RECOVERY
-3dB
GR
SLOW
HP SC
m
m
S T E R EO L I M I T E R C O M P R E S S O R
INSERT 2
OUTPUT
MAX
ATTACK
FAST
SLOW
TM
u
u
CHANNEL 1
OUTPUT 1
INSERT 1
OWNER'S MANUAL
FAST
INPUT

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Summary of Contents for Manley NU MU

  • Page 1 THRESHOLD OUTPUT METER OUTPUT +3dB RECOVERY ATTACK -3dB INPUT SLOW FAST LEVEL HP SC SLOW FAST S T E R EO L I M I T E R C O M P R E S S O R VACUUM TUBE STEREO LIMITER / COMPRESSOR CHANNEL 2 CHANNEL 1 INPUT 2...

  • Page 2: Table Of Contents

    Contents CHAPTER PAGE Introduction Manual Conventions iii) Copyright Notice Important Safety Instructions Getting Started Front Panel Rear Panel Operational Notes Advanced Tricks Questions & Troubleshooting Servicing Calibration Procedure 11-13 Specifications Recall Sheet This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC Rules.

  • Page 3: I) Introduction

    Variable Mu, combining the “T-Bar” vacuum tube front end used in the Variable Mu with a new discrete FET output stage. This marriage of tubes and solid-state electronics gives the Nu Mu a remarkable tonal character which will always make it a hit in the studio! Using the new “HIP”...

  • Page 4: Important Safety Instructions

    7. Servicing - Do not attempt any servicing without consulting your dealer or Manley Laboratories, Inc. The user should not attempt to service the unit beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel.

  • Page 5: Front Panel

    VU METER 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.
  • Page 6 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.

  • Page 7: Rear Panel

    PIN 3: NEGATIVE PHASE NOT EXPOSE THIS UNIT INPUT 2 OUTPUT 2 OUTPUT 1 INPUT 1 TO RAIN OR MOISTURE MANLEY LABORATORIES INC. CAUTION! : RISK OF SIDECHAIN SIDECHAIN 13880 MAGNOLIA AVE. CHINO, CA 91710 ELECTRIC SHOCK. DO INSERT 2...

  • Page 8: Operational Notes

    The gain control chain is technically called a getting the "Manley Sound", the hip control feedback circuit. Most modern compressors use makes this easier, when using the Nu Mu. a feed foward circuit which sounds unmusical to us but for features sake usually offers a When the "HIP"...
  • Page 9 5. Operational Notes The MANLEY NU MU LIMITER / COMPRESSOR is 2 to 6 dB. The more that the needle swings the designed for multiple purposes. The unit can be more likely the gain changes will be audible. used in stereo or as 2 individual channels of Listen for objectionable "pumping"...

  • Page 10: Advanced Tricks

    Split the Insert send of the How far to turn up each Make-up Gain to overdrive vocal to the Nu Mu and to a spare channel. EQ the or not overdrive the next unit - and still not get snot out of that second channel -boosting the 5 or 6 flooded with noise when the music stops.

  • Page 11: Questions & Troubleshooting

    All the other gear in the rack is patch bay in case there is a problem there too. “dumping” ground noise onto the rack rails. Try removing the Nu Mu from the rack so that it is not...

  • Page 12: Servicing

    5000-6000 hours, after which time the tubes should be replaced. If the Nu Mu has become noisy, this could be related to tube wear. Consult your dealer or purchase new tubes from Manley Labs. We suggest low noise and graded quality. Simply hold the tube firmly at its base and vertically pull upwards, freeing the tube from its socket.

  • Page 13: Calibration Procedure

    Note: NU MU unity gain settings: INPUT LEVEL switch set to “0dB” and, the OUTPUT control set roughly to 11:00 O'clock. The position of the output control for unity gain will vary slightly from unit to unit.
  • Page 14 10. Calibration Procedure The Manley Nu Mu features two independent large VU meters (1 per channel), which allow you to read the amount of gain reduction (GR) or read the output level at the main output XLR. A push button (common for both channels) allows you to switch between the two options.

  • Page 15: Calibration Procedure

    10. Calibration Procedure Note: (1kHz sine at I/O: +4dBu/1.23Vrms) Audio GR Vs Meter GR tracking tolerance: +/- 0.1dB (from 0 to 2 dB of gain reduction). Audio GR Vs Meter GR tracking tolerance: +/- 0.5dB (from 3 to 7 dB of gain reduction). (Matched PAIR of VU meters provides best tracking) Note: LINK Audio GR tracking Left CH Vs Right CH Tolerance: (1kHz sine at I/O: +4dBu/1.23Vrms)

  • Page 16: Specifications

    9. Specifications MANLEY NU MU STEREO VACUUM TUBE LIMITER / COMPRESSOR Fully differential front end, with Manley IRON input transformers Ÿ Two pairs of hand matched 6BA6's vacuum tubes per channel. Ÿ New solid state output stage. High voltage, discrete transistor design with high headroom for a smooth, Ÿ...

  • Page 17: Recall Sheet

    10. Recall Sheet...
  • Page 18 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 Designed & Handcrafted in the USA Manley Laboratories, Inc. 13880 Magnolia Avenue Chino, CA 91710 USA T: +1 (909) 627-4256 www.manley.com...

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