{"product_id":"igs-audio-one-leveling-amplifier-optical-compressor","title":"IGS Audio One Leveling Amplifier Optical Compressor","description":"\u003cp\u003eThe \u003cstrong\u003eIGS Audio ONE LA\u003c\/strong\u003e is an optical compressor, inspired by the legendary solution well known from the '60s. This is a very easy to use and great sounding tool.\u003c\/p\u003e  \u003cp\u003eThe IGS ONE LA is an input and output transformer balanced, full tube device. The input of the system includes a Sowter 4383 transformer, the output an Edcor 15k\/600. Two 6N1P-EW dual-triodes are installed on the audio circuit, while the compression circuit is equipped with the 6N2P-EW triode and the 6AQ5 pentode, which control the work of the T4Bx photocell.\u003c\/p\u003e  \u003cp\u003eThe One LA 19\" has simple controls: a Peak-Reduction knob controls the gain of the side-chain circuit, and therefore, the gain reduction threshold; Gain Control for the make-up gain; and a Limit\/Compress switch to alter the compression ratio. The VU meter may also be switched to show gain reduction or output level.\u003c\/p\u003e  \u003cp\u003eThe original solution used the TELETRONIX electroluminescent panel, that was illuminating the photo resistor. The idea of opto-compression originated in the past is still being cultivated today. IGS Audio has developed its own photocell equivalent to T4B called T4BX. The use of carefully selected components in the production of the T4BX photocell, and their individual measurement and matching, result in completely repetitive sound qualities of each device.\u003c\/p\u003e  \u003ch3\u003eSpecifications:\u003c\/h3\u003e  \u003cul\u003e \u003cli\u003eOptical Compressor T4B photocell\u003c\/li\u003e \u003cli\u003eAll stepped manipulators: 24 step Elma switches\u003c\/li\u003e \u003cli\u003eStereo Link: RCA-RCA cable\u003c\/li\u003e \u003cli\u003eInput Impedance (balanced): 600 ohm\u003c\/li\u003e \u003cli\u003eOutput Impedance (balanced): 600 ohm\u003c\/li\u003e \u003cli\u003eAudio transformers: input - Sowter, output - Edcor\u003c\/li\u003e \u003cli\u003eOperating level: +4 dBu\u003c\/li\u003e \u003cli\u003eMax input level: +16dBu\u003c\/li\u003e \u003cli\u003eMax output level: +18 dBu\u003c\/li\u003e \u003cli\u003eMax gain: 30 dB\u003c\/li\u003e \u003cli\u003eMax gain reduction: 36 dB\u003c\/li\u003e \u003cli\u003eAttack: 1ms\u003c\/li\u003e \u003cli\u003eRelease: 0.5 – 5s (50% @ 60ms)\u003c\/li\u003e \u003cli\u003eFrequency response: 20Hz - 20kHz; +\/- 0.3dB\u003c\/li\u003e \u003cli\u003eTHD+N: 85 dB (A)\u003c\/li\u003e \u003cli\u003eVoltage: 115\/230V AC, 50 - 60Hz\u003c\/li\u003e \u003cli\u003eTube set: 2x6N1P-EW, 6N2P-EW, 6AQ5\u003c\/li\u003e \u003c\/ul\u003e","brand":"IGS Audio","offers":[{"title":"Default Title","offer_id":44449851768935,"sku":"55834","price":1812.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/igs-audio-one-la-1_efbcf36c-77b7-45cf-9ebf-76f030d35e38.jpg?v=1787090693","url":"https:\/\/vintageking.com\/products\/igs-audio-one-leveling-amplifier-optical-compressor","provider":"Vintage King","version":"1.0","type":"link"}