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.
Manley Variable Mu Compressor/Limiter at a Glance:
- Classic compression/limiting
- Perfect for dual mono or stereo applications
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."
Features:
- Manley input & output transformers with pure nickel laminations in mu-metal case with flat frequency response
- 20Hz-25KHz frequency response
- Balanced inputs & outputs
- Fully differential all-tube circuitry using one each 5670, 5751, 7044, & 12AL5 per channel
- Independently regulated B+ and heater supplies
- Includes HP sidechain modification as standard
- Hard-wire bypass switch
- Silent conductive plastic input attenuator
- Recovery 5 steps: 0.2s, 0.4s, 0.6s, 4sec., 8sec. (Not a 12-step recovery)
- Variable attack: 25msec-70msec
- Continuously variable threshold
- Switch for limit or compress modes
- Front panel mounted meter adjust
- Limit (4:1 to 20:1) or compress (1.5:1)
- Large illuminated sifam meters
- Stereo link switch
- Maximum gain: 35 dB
- <0.1% THD @ 1KHz Noise floor: -85dB typical
- Max. output +30dBm (26Vrms) 26dB Headroom
- Power consumption (120/240VAC): 80 watts
- Dimensions: 19" x 3 1/2" x 10" (occupies 2u)
- Shipping weight: 23 lbs.
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