Set it and forget it! Our 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 signal-- like 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 limiting-- problems 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.
Features And Specifications
ALL-DISCRETE audio path
Balanced XLR inputs & outputs and...
Unbalanced 1/4" inputs & outputs
Silent conductive plastic INPUT attenuators
Max. GAIN REDUCTION 22dB
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
<0.015% THD @1Khz
S/N Ratio: 126dB
Gain: -2 dB to 12 dB (adjustable)
Power consumption (120/240VAC): 24 watts
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.
