{"product_id":"manley-vari-mu-t-bar-mod","title":"Manley Vari MU + T-BAR Mod","description":"\u003cp\u003eThe \u003cstrong\u003eManley Vari MU\u003c\/strong\u003e is an all valve compressor and limiter designed for stereo buss compression.\u003c\/p\u003e\n\u003cp\u003eThe Manley Vari Mu takes its name from the patented technology used in this compressor, in which the valve is the gain reduction element. The compression works by using the “remote cut-off” or re-biasing of the 5670 dual triode vacuum tube. \u003c\/p\u003e\n\u003cp\u003eIn compression mode, the Vari MU starts with a soft-knee 1.5:1 ratio, while in Limit mode the ratio starts at 4:1 and increases all the way up to 20:1 when pushed over 12dB of gain reduction. As more limiting occurs, the knee softens. This explains why it possible to push the Manley Vari Mu further than any other compressors.\u003c\/p\u003e\n\u003cp\u003eAlthough it was originally designed as a mixbuss compressor to sweeten the final mix, it is nonetheless possible to use it as a dual mono with both sides having their own sets of controls including threshold, attack, recovery and output.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eThe T-Bar Modification\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe newer Variable MU units use 5670 tubes instead of the scarce and often problematic 6386 tubes. While the 5670 sounds similar to the 6386 up to about 6dB of limiting, beyond that, it tends to sound more \"squashed.\" The T-Bar Mod, solves these issues by using a pair of 6BA6 pentodes wired as single triodes to replace each dual triode 5670 (or 6386). This modification ensures perfect matching of each phase-halves section and stereo set, provides low noise and low microphonic sets at a lower cost, and closely resembles the smooth 6386 limiting curves.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManley Vari MU Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMANLEY input \u0026amp; output transformers with nickel laminations in mu-metal cases with flat frequency response from 20Hz-25KHz\u003c\/li\u003e\n\u003cli\u003eBALANCED INPUTS \u0026amp; OUTPUTS (600 Ohms)\u003c\/li\u003e\n\u003cli\u003eFully differential ALL-TUBE circuitry using one each 5670, 5751 (or 12AX7), 7044 (or 5687), \u0026amp; 12AL5 per channel\u003c\/li\u003e\n\u003cli\u003eIndependently regulated B+ and Heater supplies\u003c\/li\u003e\n\u003cli\u003eHard-wire BYPASS switch\u003c\/li\u003e\n\u003cli\u003eStepped switch INPUT attenuator as of 10\/2011. (older units use Silent dual-ganged potentiometer)\u003c\/li\u003e\n\u003cli\u003eRECOVERY 5 steps: 0.2s, 0.4s, 0.6s, 4sec., 8sec.\u003c\/li\u003e\n\u003cli\u003eVariable ATTACK: 25msec-70msec\u003c\/li\u003e\n\u003cli\u003eContinuously variable THRESHOLD\u003c\/li\u003e\n\u003cli\u003eLIMIT (4:1 to 20:1) or COMPRESS (1.5 to 1)\u003c\/li\u003e\n\u003cli\u003eHP SC: High Pass Side Chain Filter -3dB @ 100Hz\u003c\/li\u003e\n\u003cli\u003eLarge 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)\u003c\/li\u003e\n\u003cli\u003eSTEREO LINK SWITCH\u003c\/li\u003e\n\u003cli\u003eSeveral units can be linked for Surround (custom order )\u003c\/li\u003e\n\u003cli\u003eMaximum gain: 35dB\u003c\/li\u003e\n\u003cli\u003eMax. output: +30dBu (26Vrms) 26dB Headroom\u003c\/li\u003e\n\u003cli\u003e\u0026lt;0.1% THD @ 1KHz Noise floor: -85dB typical\u003c\/li\u003e\n\u003cli\u003ePower Consumption (120\/240VAC): 80 watts\u003c\/li\u003e\n\u003cli\u003eUnit is factory set for 100V, 120V or 220-240VAC operation for original destination country's mains voltage.\u003c\/li\u003e\n\u003cli\u003eOperating Mains Voltage changeable with power transformer changeover switch and fuse value change.\u003c\/li\u003e\n\u003cli\u003eMains Fuse Value for 100~120VAC operation: replace with 1.25A as of 10\/2011\u003c\/li\u003e\n\u003cli\u003eMains Fuse Value for 220~240VAC operation: replace with 0.6A (600mA) as of 10\/2011\u003c\/li\u003e\n\u003cli\u003eMains Fuse Type: MDA or MDL SLO-BLO Time delay 1 1\/4\" x 1\/4\"\u003c\/li\u003e\n\u003cli\u003eMains Voltage Frequency: 50~60Hz\u003c\/li\u003e\n\u003cli\u003eDimensions: 19” x 3 1\/2” x 10” (chassis occupies 2u) Power transformer protrudes 3.5\" out the back of the chassis.\u003c\/li\u003e\n\u003cli\u003eShipping Weight: 23 lbs.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Manley Laboratories, Inc.","offers":[{"title":"Default Title","offer_id":57196164972927,"sku":"ITM004352","price":3974.17,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/4915\/9716\/files\/varimu_f2_5.jpg?v=1755625664","url":"https:\/\/kmraudio.com\/products\/manley-vari-mu-t-bar-mod","provider":"KMR Audio","version":"1.0","type":"link"}