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Langevin ELOP Stereo Electro-Optical Limiter

Discussion in 'Dual Compressors' started by audiokid, Oct 25, 2011.

  1. audiokid

    audiokid Staff


    Set it and forget it! The Langevin ELOP® Limiter makes your job easy. The principle of operation is based around using a rectified sample of the audio to shine an LED (Light Emitting Diode) onto an LDR (Light Dependent Resistor). The photo-resistor in combination with a fixed resistor simply act as a changing voltage divider to attenuate the signallike a smart volume control. A similar principle was found in the older Teletronix®** & Urei LA-2A®**, LA-3, and LA-4 units which used a slower electro-luminescent panel-light on a conventional LDR encased in a light-tight enclosure. Ours uses modern VACTROL technology (but with a trick!) for exact sample-to-sample tracking and no high frequency loss while digging deep into limitingproblems commonly associated with older LA-series limiters and other opto-based units.

    The audio signal passes only through all-discrete Class A amplifiers in the Langevin version. Each channel can be run separately or switched to 'stereo - link ?. Due to their inherently quick attack, these Electro-Optical Limiters are skilled soldiers for tracking vocals or individual instruments.

    TD="width: 100%"
    *ALL-DISCRETE audio path
    *Balanced XLR inputs & outputs and...
    *Unbalanced 14" inputs & outputs
    *Silent conductive plastic INPUT attenuators
    *ATTACK time 10mS for 6dB GR
    *RELEASE : 2.5 Seconds for 6dB GR
    *BYPASS switches
    *Sifam VU METERS
    *Meters switch to read OUTPUT or REDUCTION
    *STEREO LINK switch

    Attached Files:

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