All
 
  • Login
  • 866-498-7882
  • My Account
  • Wish List
  • Financing
  • Help
  • Feedback
  • Change
  • Products
    • Guitars
      Top Categories
      1. All Guitars
      2. Electric Guitars
      3. Acoustic Guitars
      4. Acoustic-Electric Guitars
      5. Classical Guitars
      6. Left-Handed Guitars
      7. Guitar Value Packs
      8. Guitar Accessories
      Related Products
      1. Guitar Amps
      2. Pedals & Effects
      3. Strings
      4. Cases & Gig Bags
      5. Stands & Hangers
      6. Straps
      7. Picks
      8. Cables
      9. Folk Instruments
      Top Brands
      1. Fender
      2. Gibson
      3. Epiphone
      4. Ibanez
      5. Martin
      6. Music Man
      7. Taylor
      8. ESP
      9. PRS
    • Platinum Guitars
      Buy Platinum Inventory
      1. Platinum Guitars
      2. Platinum Bass
      3. Platinum Amps
      4. Boutique Pedals
    • Bass
      Top Categories
      1. All Bass
      2. Electric Bass
      3. Acoustic Bass
      4. Electric Upright Bass
      5. Left-Handed Bass
      6. Electric Bass Value Packs
      7. Bass Accessories
      Related Products
      1. Bass Amps
      2. Pedals & Effects
      3. Strings
      4. Cases & Gig Bags
      5. Stands & Hangers
      6. Cables
      Top Brands
      1. Ibanez
      2. Schecter
      3. Fender
      4. Music Man
      5. ESP
      6. Dean
      7. Squier
    • Drums & Percussion
      Top Categories
      1. All Drums & Percussion
      2. Acoustic Drums & Sets
      3. Electronic Drums & Sets
      4. Cymbals
      5. Hand Drums & World Percussion
      6. Drum Hardware
      7. Marching Percussion
      8. Concert Percussion
      9. Classroom & Kids
      10. Accessories & Parts
      Related Products
      1. Sticks & Accessories
      2. Heads
      3. Stands & Racks
      4. Cases, Bags & Covers
      5. Drum Mics
      6. Thrones
      7. Drum Amps & Monitors
      8. Software & Virtual Instruments
      Top Brands
      1. DW
      2. Pearl
      3. Zildjian
      4. Sabian
      5. Tama
      6. Vic Firth
      7. Remo
      8. PDP
      9. Gretsch
    • Live Sound Equipment
      Top categories
      1. All Live Sound
      2. PA Systems
      3. PA Speakers
      4. Live Power Amps
      5. Stage Monitors
      6. Stage Subwoofers
      7. Signal Processors
      8. Mixers
      9. Dynamic (Live) Microphones
      10. Wireless Systems
      11. Headphones
      12. Power Conditioners
      13. DJ Equipment
      14. Stage Lighting & Effects
      Related Products
      1. Stands & Racks
      2. Cases & Gig Bags
      3. Cables & Snakes
      4. PA Replacement Speakers & Parts
      5. Stage Accessories
      6. Software & Virtual Instruments
      7. iOS Devices
      Top Brands
      1. JBL
      2. QSC
      3. Mackie
      4. Electro-Voice
      5. Bose
      6. Behringer
      7. Shure
    • Microphones & Wireless
      Top Categories
      1. All Microphones
      2. All Wireless Systems
      3. Condenser (Recording) Microphones
      4. Dynamic (Live) Microphones
      5. USB Microphones
      6. iOS Microphones
      7. Drum Microphones
      8. Microphone Packs & Kits
      9. Microphone Accessories
      Related Products
      1. Stands & Booms
      2. Cases & Gig Bags
      3. Cables
      4. Microphone Preamps
      5. Vocal Processors
      6. Vocal Software
      Top Brands
      1. Shure
      2. MXL
      3. Audio-Technica
      4. AKG
      5. Sennheiser
      6. Blue
      7. Electro-Voice
    • Amplifiers & Effects
      Top Categories
      1. All Amps & Effects
      2. Guitar Amps
      3. Bass Amps
      4. Amp Stacks
      5. Mini Amps
      6. Headphone Amps
      7. Keyboard Amps & Monitors
      8. Drum Amps & Monitors
      9. Harmonica Amps
      10. Guitar Effects
      11. Bass Effects
      Related Products
      1. Covers & Cases
      2. Stands
      3. Tubes & Parts
      4. Cables & Snakes
      5. Stage Lighting & Effects
      6. Preamps
      Top Brands
      1. Fender
      2. Marshall
      3. Line 6
      4. Boss
      5. Dunlop
      6. Vox
      7. Peavey
    • Keyboards & MIDI
      Top Categories
      1. All Keyboards & MIDI
      2. Production & Groove
      3. Digital Pianos
      4. Synthesizers
      5. Workstations
      6. Portable & Arranger Keyboards
      7. MIDI Controllers
      8. MIDI Interfaces
      9. iOS Keyboards
      10. Keyboard Accessories & Parts
      Related Products
      1. Keyboard Amps & Monitors
      2. Benches & Stools
      3. Stands & Racks
      4. Keyboard Pedals
      5. Cases & Gig Bags
      6. Cables
      7. Power Supplies
      8. Software & Virtual Instruments
      9. Accordions
      Top Brands
      1. Korg
      2. Casio
      3. Yamaha
      4. Roland
      5. Akai
      6. M-Audio
      7. Moog
      8. Nord
      9. Native Instruments
    • Accessories
      Top Categories
      1. All Accessories
      2. Strings
      3. Cables & Snakes
      4. Cases & Gig Bags
      5. Stands & Racks
      6. Tuners & Metronomes
      7. Guitar & Bass Parts
      8. Power & Batteries
      9. Furniture & Studio Foam
      10. Care & Cleaning
      11. Practice & Performance Aids
      12. Tools
      Related Products
      1. Pedals & Effects
      2. Pickups
      3. Software & Virtual Instruments
      4. Books, Sheet Music & Media
      5. Gifts, Collectibles, & Clothing
      6. Personal & Home Entertainment
      7. iPad
      8. iPad Apps
      Top Brands
      1. D'Addario
      2. Ernie Ball
      3. Dunlop
      4. ProLine
      5. Live Wire
      6. Hercules
      7. Levy's
      8. EMG
    • Recording & Software
      Top Categories
      1. All Recording
      2. All Software
      3. Audio Interfaces
      4. Studio Monitors
      5. Studio Subwoofers
      6. Recording Packages
      7. Recorders
      8. Audio Playback
      9. Microphones
      10. Headphones
      11. Signal Processors
      12. Mixers
      13. Computers & Peripherals
      Related Products
      1. Furniture & Studio Foam
      2. MIDI
      3. Books, Sheet Music & Media
      4. Benches & Stools
      5. Stands & Racks
      6. Cables & Snakes
      7. Power & Batteries
      8. Disc Duplication
      9. Recordable Media & Memory
      10. iOS Devices
      11. iPad
      12. iPad Apps
      Top Brands
      1. TASCAM
      2. M-Audio
      3. Apple
      4. Avid
      5. Ableton
      6. KRK
      7. PreSonus
      8. Focusrite
      9. Native Instruments
    • iPad, iPod & iOS Devices
      Top Categories
      1. All iOS
      2. iOS Audio/MIDI Interfaces
      3. iOS DJ Gear
      4. iOS Mixers
      5. iOS Keyboards
      6. iOS Microphones
      7. iOS Live Sound
      8. iOS Docks & Speaker Systems
      9. iOS Accessories
      10. iPad
      11. Apps
      12. iPods & MP3 Players
      Related Products
      1. Headphones
      2. Software
      3. Cables & Snakes
      4. Computers & Peripherals
      Top Brands
      1. AirTurn
      2. Apogee
      3. Apple
      4. Blue
      5. IK Multimedia
      6. Mackie
    • DJ & Lighting
      Top Categories
      1. All DJ
      2. Lighting & Effects
      3. Controllers & Interfaces
      4. DJ CD, MP3 & Media Players
      5. Mixers & Parts
      6. Packages/Systems
      7. Turntables
      8. iOS DJ Gear
      9. DJ Accessories
      10. Headphones
      11. DJ & Remix Software
      Related Products
      1. Karaoke
      2. PA Systems
      3. Microphones & Wireless
      4. Production & Groove
      5. Cables & Snakes
      6. Stands & Racks
      7. Cases & Bags
      8. Lighting Stands & Truss
      Top Brands
      1. Chauvet
      2. Native Instruments
      3. Pioneer
      4. Numark
      5. JBL
      6. eMedia
      7. MJS
    • Books & Videos
      Top Categories
      1. All Books & Videos
      2. Instruction Materials
      3. Tablature
      4. Sheet Music
      5. Music Education for Children
      6. Music Theory & History
      7. Music Industry & Special Interest
      8. Pro Audio Instruction
      Related Products
      1. Sheet Music & Scores
      2. Performance Instruction
      3. Tablature
      4. Music Education for Children
      5. Music Theory & History
      6. Music Industry & Special Interest
      7. Pro Audio Instruction
      8. En Espanol
      Top Brands
      1. Hal Leonard
      2. Alfred
      3. eMedia
      4. MJS
      5. Cengage
      6. Carl Fischer
      7. Mel Bay
      8. Cherry Lane
    • Folk & Wind Instruments
      Top Categories
      1. All Folk & Wind Instruments
      2. Ukuleles
      3. Banjos
      4. Mandolins
      5. Resonators
      6. Pedal & Lap Steels
      7. Latin Guitars
      8. Harmonicas
      9. Accordions
      Related Products
      1. Strings
      2. Cases & Gig Bags
      3. Cables
      4. Stands & Hangers
      5. Guitar Accessories
      6. Books, Sheet Music & Media
      7. Tuners & Metronomes
      Top Brands
      1. Fender
      2. Hohner
      3. Lanikai
      4. Rogue
      5. Suzuki
      6. Gretsch
      7. Deering
    • Band & Orchestra
      Top Categories
      1. All Band & Orchestra
      2. Woodwind Instruments
      3. Brass Instruments
      4. Orchestral Strings
      5. Marching Band
      6. Concert Percussion
      7. Classroom & Kids
      Related Products
      1. Woodwind Accessories
      2. Brass Accessories
      3. Orchestral Strings Accessories
      4. Marching Accessories
      5. Concert Percussion Accessories
      6. Books, Sheet Music & Media
      7. Tuners & Metronomes
      Top Brands
      1. Vandoren
      2. Yamaha
      3. Rico Reeds
      4. Buffet Crampon
      5. Bach
      6. Selmer Paris
    • Vintage
      Vintage Gear
      1. Vintage Guitars
      2. Vintage Bass
      3. Vintage Drums
      4. Vintage Amps & Effects
      5. Vintage Keyboards
      6. Vintage Microphones
    • Guitar Center Gift Card
  • Brands
    • Fender
    • Gibson
    • Epiphone
    • Martin
    • Taylor
    • Yamaha
    • Ibanez
    • Roland
    • Line 6
    • Shure
    • Dunlop
    • Ernie Ball
    • D'Addario
    • Remo
    • Apple
    • All Brands
  • Used Gear
    • All Used Gear
    • Vintage Gear
    • Used Guitars
    • Used Amps
    • Used Bass
    • Used Drums
    • Used Live Sound
    • Used Recording
    • Used Accessories
    • Used Keyboards
    • Sell Your Gear
  • Clearance
    • Clearance
  • GC Pro
    • Featured Products
    • Installation Services
    • Technical Support
    • Education Affiliates
  • Our Stores
    • Store Locator
    • GC Garage
    • GC Studios
  • Learn
    • Music Mentor
  • GC Music
    • GC on Tumblr
    • Sessions TV
    • Artist Interviews
    • Podcasts
    • Connections
    • YouTube
    • Facebook
    • Twitter

Item # 620908

Print this page

  1. Select the information you'd like to print out.
  2. Cancel
Manley Stereo Variable Mu Limiter Compressor
Use Add to Cart below to have it shipped to you, or to a store near you.
Close
  • Store
  • Availability
Guaranteed Lowest Price
Pickup In Store
GC Shopping Cart
 Cart Contents
Qty Description Price Shipping Subtotal 
      Manley Stereo Variable Mu Limiter Compressor (620908)
Availability:  


The compressor used on most hit records.

The Manley Variable Mu Limiter Compressor has been Manley's best selling product for many years. It is one of the very few compressors that have become a real standard in mastering studios and contributed to most hit records over the last decade—and probably the next. "Mu" is tube-speak for gain. It works by using the "remote cut-off" or re-biasing of a vacuum tube to achieve compression.

The highly revered vintage Fairchild 670 also uses this technique, and is one of few all-tube compressors to do so. Even the side-chain has glowing rectifier bottles. How's it work? The unique 5670 dual triode is at the center of the peak-reduction and compression action constantly being re-biased by the vacuum tube rectified side-chain control voltages, which cause this tube to smoothly change its gain. Just like that.

The Compress mode is a soft-knee 1.5:1 ratio, while the sharper knee Limit mode starts at 4:1 and moves to a more dramatic ratio of 20:1 when limiting over 12dB. Interestingly, the knee actually softens as more limiting is used. Distortion can be creatively used by turning up the Input and turning down the Output while using very little or no compression.

You might notice that the Variable Mu Limiter Compressor has a ganged input control, but do not jump to conclusions that it is mono-unfriendly. Track away! There are separate threshold and output controls to make compensations with plus you can always adjust your individual source levels elsewhere, right? The advantage of the stereo input control becomes dramatically clear when you switch to LINK mode, and that's what our Variable Mu Limiter Compressor does better than anything else: final mix, 2-track, or mastering limiting and compression. Like one reviewer put it: "It's like pouring a bowl of sweet cream over the mix." Mmmmmm. Yummy. Give your music a big hug. (See "Which Manley Limiter Should I Buy" below)


Manley Variable Mu Limiter Compressor Modifications:

High-Pass Side Chain option: Also available on the mastering version of the Variable Mu (#620909), this adds two switches to the front panel, one for each channel, so that when engaged, the side chain will not respond to frequencies lower than 100Hz. (100Hz is standard as the -3dB point. Other frequencies can be custom-ordered.) This HP SC Mod can be used with music with heavy bass lines or bass-heavy mixes where you don't want the bass driving the whole action of the compressor.

The filter is a very gentle 6db per octave 1 pole filter, and will typically be down 1-3db at 100 Hz, and down 4-6db at 50Hz. As you decrease the frequency the amount of limiting will decrease also. At the extreme LF (<20hz) there should be very little gain reduction going on. The purpose of the filter is to keep very LF stuff (like a heavy kick drum) from activating the compression/limiting so that the overall level doesn't duck with every drumbeat.

Mid-Side mod upgrade (Vertical/Lateral or Sum/Difference): This modification opens the door to stereo encoding and decoding, as well as exciting image-enhancement processing capabilities. For instance, setting it to compress the in-phase information only allows the augmentation of the stereo image as the out-of-phase content is left untouched. Or, conversely, if you need a "more-mono" mix for broadcast, or vinyl-cutting for instance, you can set it to kill off more of the out-of-phase info which leaves more in-phase material in the final result. (Read more about the M-S Mod on page 12 of the owner's manual.)

Note: There is no space to add both the M-S and High-Pass mods. You must choose one or the other.


T-Bar mod: This modification is in response to users wanting to know if they should use the 5670 tubes or 6386 tubes. With the poor availability of the original USA GE 6386 tubes, newer Variable Mu Limiter Compressors use the 5670s. Do the 5670s sound different? Well, up to about 6db of limiting it's about the same. After that point, the 5670 version tends to sound more "squashed" than the original 6386 version. Some like it better, some don't—depends on what you're trying to do. To solve all these problems, Manley came up with a really good solution: the T-Bar Mod, which uses a pair of 6BA6 pentodes wired as single triodes to replace each dual triode 5670 (or 6386). The 6BA6 T-BAR Mod is the preferred system to use in the Manley Variable Mu for the ability to perfectly match each phase-halve section and each stereo set; ability to select for lo-noise and lo-microphonic sets for a low cost; and because the action of the 6BA6's so closely resemble the smooth 6386 limiting curves.

Which Manley Limiter Should I Buy?


Along with the Variable Mu, Manley makes a number of compressor/limiters including the ELOP (#620914), SLAM (#620610-13), VOXBOX (#620884), Langevin Stereo ELOP (#620918), and Langevin Dual Vocal Combo (#620915). The most commonly heard questions are, "Which compressor should I buy?" "Do they all sound the same?" And "will the one I buy do everything I need it to do?" The answer is that each unit sounds different, but those differences may be more subtle than dramatic. The differences rest mainly in how the gain reduction is done and most importantly, how you intend to use them.

The Variable Mu is largely intended for mixed tracks where a few dB of smooth and gentle compression is desirable. It does excel at introducing a tasteful amount of color or character depending on Input and Output Level settings. It is usually at a disadvantage when used for deeper than 6dB of gain reduction, or if really fast attack and release times would be a better call. So it might be considered a sweet and gentle "color box" more than a textbook dynamics processor. Those who understand this tend to love the box. Those who try to make it "pump," "get aggressive," or distort like a guitar pedal, tend to be less satisfied. Of course, many do use it for adding a little something special on vocal and guitar tracks. The Variable Mu will do a lot of things extremely well, but no one dynamics processors will pull off every trick in the book.

The Variable Mu is more of a "color-box" to add a subtle richness and vibe. The word "glue" is perhaps the most appropriate word to describe the Variable Mu's effect on a mix. It makes that record sound "like a real record" cohesive and balanced.

Channel Strips of the Stars: Ronan Chris Murphy

World-class producer/engineer/mixer Ronan Chris Murphy's credits include King Crimson, Steve Morse, Terry Bozzio, Victor Bisetti, Gregg Bissonette, Tony Levin, and projects with members of Tool, Ministry, Weezer, Dishwalla, and Yes.

Ronan was kind enough to share the drum overhead signal chain he has used on Terry Bozzio (Frank Zappa), Victor Bisetti (Los Lobos), Gregg Bissonette (Santana, David Lee Roth), Pat Mastelotto (King Crimson, Mister Mister, The Rembrandts), and many more:

2 x Shure KSM32 (#270141) > 1 x A-Designs Audio Pacifica (#189903) >
Manley Variable Mu Limiter Compressor

Manley Stereo Variable Mu Limiter Compressor Features:

  • Manley input and output transformers with nickel laminations
    in mu-metal cases with flat frequency response from 20Hz-25KHz
    Balanced inputs and outputs (600 ohms)
    Fully differential ALL-TUBE circuitry using one each
    5670, 5751, 7044 or 5687, & 12AL5 per channel
    Independently regulated B+ and Heater supplies
    Hard-wire Bypass switch
    Silent conductive plastic dual INPUT attenuator
    Recovery 5 steps: 0.2s, 0.4s, 0.6s, 4sec., 8sec.
    Variable Attack: 25msec-70msec
    Continuously variable Threshold
    Limit (4:1 to 20:1) or Compress (1.5:1)
    Large illuminated Sifam meters
    stereo link switch
    Several units can be linked for Surround (custom-order)



Manley Stereo Variable Mu Limiter Compressor Specifications:

  • Maximum gain: 35dB
    Max. output: +30dBu (26Vrms) 26dB Headroom
    <0.1% THD @ 1KHz Noise floor: -85dB typical
    Power Consumption (120/240VAC): 80 watts
    Unit is factory set for 100V, 120V or 220-240VAC operation for original destination country's mains voltage.
    (Operating Mains Voltage changeable with power transformer changeover switch and fuse value change)
    Mains Voltage Frequency: 50~ 60Hz
    Dimensions: 19" x 3 1/2" x 10" (chassis occupies 2u) Power transformer protrudes 3.5" out the back of the chassis.
    Shipping Weight: 23 lbs.


Voice your opinion! Be the first to review »
Questions about the Stereo Variable Mu Limiter Compressor (620908)


To: GuitarCenter.com
PO Box 4769
Westlake Village, CA 91359
USA
866-498-7882
 
Order #: (if applicable)  * Denotes Required Field
*First Name:
*Last Name:
*Email:
Phone:
*Subject:
*Message:
Click to add file attachment
File Upload 5mb limit