An industry standard for professional mastering studios, the Mastering Version of the Stereo Variable Mu Limiter Compressor employs metal-film resistors loaded onto beautiful Grayhill sealed gold-contact switches for absolute repeat ability, accuracy, and reliability. 1/2 dB steps ensure precise and subtle adjustments. This is what defines mastering. High Pass Side Chain mod now comes standard.
Features & Specifications
- MANLEY input & output transformers with nickel laminations in mu-metal cases with flat frequency response from 20Hz-25KHz
- BALANCED INPUTS & OUTPUTS (600 Ohms)
- 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)
- STEREO LINK SWITCH
- 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.
SPECIAL MASTERING VERSIONS AND CUSTOM MODS AVAILABLE TO ORDER
Manley Stereo Variable MU Mastering Version with MS Mod Option
The MS Mod turns the left channel into “middle” and the right into “sides” to compress each phase component independently. For example, squash the vocal, kick, snare, bass (in-phase info) while keeping the out-of-phase program intact to make the stereo image super-wide. Do the opposite to make the result more mono and radio-friendly.
Manley Stereo Variable MU Mastering Version with T-Bar Mod Option
The ideal choice for routine extreme limiting, this mod makes the Variable MU even smoother when pushed past 6 dB of compression. Using two matched 6BA6 pentodes strapped as triodes makes this choice better than an unobtainable & unsortable 6386.
Manley Stereo Variable MU Mastering Version “The Works”
Includes both MS Mod & T-Bar Mod Options. The power switch must be relocated to the rear panel whenever the MS mod is applied.
Manley Stereo Variable MU Mastering Version ADD-HP
The High Pass Side Chain Filter (HP SC) Option can be retrofitted to older units. This allows the bass to dominate without triggering the whole compressor into action.