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Manley VariMu Tbar Mod

Manley VariMu Tbar Mod

Manley VariMu stereokompressor er blant noen av verdens mest respekterte lydteknikere og produsenter regnet som deres viktigste verktøy i studiohverdagen. VariMu kompressoren bygger sin ide på den etterhvert legendariske Fairchild 660/670 kompressoren. Ikke bare holder den et godt grep om dynamikken i signalet, men den gir også noe ekstra. Et akustisk gitarspor som sildrer sine nensomme toner gjennom en VariMu vil rett og slett låte så uendelig mye bedre. VariMu-kompressoren er limet du trenger for at instrumentene skal "sitte" sammen i miksen din. Og i tillegg får du et anslag av noe forfinet på kjøpet. TBar-modifikasjonen kan nå leveres som en standard, og gir, om mulig, ennå "smoothere" operasjon. NB! Dette er en bestillingsvare, og en til to ukers leveringstid må påregnes.

Lagerstatus: På lager

kr 46 500,00


The renowned Manley Stereo Variable Mu compressor/limiter is a favorite of producers and recording engineers - and one listen to what this device does for your sound will make you a believer, too! Anyone who has heard the classic Fairchild 670 Series limiters in action has an idea of this Variable Mu's capabilities - but the sound is even sweeter with the Variable Mu. Its adjustable attack and release settings are optimized for mixing and mastering, but are flexible for most tracking situations. Sonically versatile and dependable for daily use, the Variable Mu is Manley's best-selling device.

Classic compression/limiting
Although the Variable Mu is not a clone of one, the Fairchild 670 series used a similar limiting principle and those who are familiar with that piece of gear know this method to be very special. In fact, with "mu" meaning gain or amplification factor, the Variable Mu offers true variable gain, unlike most devices. How it works is that the unique 5670 dual trioide is at the center of the peak-reducing and compression action - and it's constantly being re-biased by the vacuum tube rectified side-chain control voltages. This causes the tube to smoothly change its gain.

The Varible Mu's Compress mode is 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 Outputs while using very little or no compression.

Perfect for dual-mono or stereo applications
You might notice that the Vari-Mu has a ganged input control, but it's certainly not mono-unfriendly. There are separate threshold and output controls to make compensations with, plus you can always adjust your individual source levels elsewhere. The advantage of the stereo input control becomes clear when you switch to Link mode, and that's what th Variable Mu 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."

  • MANLEY input & output transformers with nickel laminations in mu-metal cases with flat frequency response from 20Hz-25KHz
  • Fully differential ALL-TUBE circuitry using one each 5670, 5751 (or 12AX7), 7044 (or 5687), & 12AL5 per channel
  • Independently regulated B+ and Heater supplies
  • Hard-wire BYPASS switch
  • Stepped switch INPUT attenuator as of 10/2011. (older units use Silent dual-ganged potentiometer)
  • 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 to 1)
  • HP SC: High Pass Side Chain Filter -3dB @ 100Hz
  • Large ILLUMINATED Sifam METERS (older units before serial number MSLC61642 shipped before 12/2003 use: 26V 1.2W FESTOON LAMPS; Manley's Part Number: VAR016B) Order spare bulbs using our parts order form. (newest units after serial number MSLC61642 shipped after 12/2003 use white LED lighting)
  • Several units can be linked for Surround (custom order )
  • 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 Fuse Value for 100~120VAC operation: replace with 1.25A as of 10/2011
  • Mains Fuse Value for 220~240VAC operation: replace with 0.6A (600mA) as of 10/2011
  • Mains Fuse Type: MDA or MDL SLO-BLO Time delay 1 1/4" x 1/4"
  • 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.

Teknisk informasjon

PURPOSE: To provide a replacement for the obsolete 6386 tubes in earlier Manley Variable Mu® units or convert later 5670 units to have the same limiting characteristics of the original 6386 for smoother operation.

METHOD: To install a converter board and surrounding modifications to enable usage of two 12BA6 or 6BA6 single pentodes wired in triode mode to take over the duties of a single envelope dual triode 6386 or 5670 (per channel).

INTRODUCTION: The Manley Variable Mu® has been in production for some years now and has become an indispensable tool in studios since its inception. These units operate on the same principle as several top-notch vintage tube limiters, and the original Manley version indeed used the same 6386 input tube as the Fairchild, Gates, and others. This tube is the one that actually performs the gain reduction; it, more than any other component, determines the sonic signature of these units. HISTORY: The 6386 dual triode was designed as a cascode RF/IF gain-controlled amplifier, and as such, had many characteristics ideally suited for use as a gain-controlled audio amplifier. However, it seems this tube was used more in commercial/industrial applications rather than high volume consumer applications (like in radios and TV's). Also, it appears that none of these have been manufactured in recent years. The combination of these two factors means that present supplies of 6386 tubes are quite limited, expensive, and in many cases unusable due to poor matching, high noise, or microphonics (which may not have been issues for the tube's original intended use). Manley decided in June of 1996 to begin using a type 5670 dual triode which were similar, importantly sharing the same pin-out as the 6386 and available in sufficient quantities to allow for testing and matching.

ENTER NEW TUBE TYPES: The 5670 equipped Variable Mu's were well received, and retained many of the characteristics that made the original version of the Variable Mu® popular. They did sound different than the original, especially when pushed past 6db or so of limiting. Even though some people even preferred the new version with the 5670, it was felt that it would be worthwhile to give the users the ability to return to the traditional sound without resorting to use of an esoteric (or unavailable) tube. We also wanted to furnish an alternative replacement for the 6386 in older units. The goal was to find a tube that was 1) nearly identical to the 6386 in performance 2) manufactured (or being manufactured) in large quantities 3) able to be retrofitted into existing units (in the field, if at all possible). This was a tall order, as other available remote-cutoff dual triodes (such as the 6BC8 and 6ES8) are not close enough in characteristics to be used as a direct replacement. Enter the 12BA6, which is a remote-cutoff single pentode. Wired as a triode, this tube has characteristics very close to the 6386 as confirmed by a Tektronix 570 curve tracer, and by A-B listening tests. These tubes were manufactured in large quantities for use as gain-controlled IF amplifiers in common radio receivers. The hitch: the 6BA6 (or 12BA6) is a single-section tube; the 6386 is a dual!