{"product_id":"igs-audio-tubecore","title":"IGS Audio TUBECORE","description":"\u003cdiv lang=\"en\"\u003e\n  \u003cp\u003e\u003cstrong\u003eIGS Audio Tubecore\u003c\/strong\u003e is a dual-channel stereo vari-mu compressor in a 3U chassis — designed from the ground up as a studio mastering compressor. The signal path is fully symmetric from input to output, with Carnhill and Sowter transformers, 1% metal film resistors, Wima capacitors, and NOS 6N1P-EW tubes individually calibrated per unit. The 3U enclosure provides panel clarity and rear access to the tube slots; all controls run on 24-position Elma switches. Operating modes include Dual Mono and Mid\/Side, with a sidechain HPF, Wet\/Dry Mixer, and two independent bypass switches per channel for A\/B comparison.\u003c\/p\u003e\n\n  \u003ch3\u003eVari-Mu and Swappable Tubes — Four Compression Characters\u003c\/h3\u003e\n  \u003cp\u003eVari-mu compression works by varying the operating point of the triode via the sidechain voltage — the higher the input level, the more the tube is driven into cutoff, the greater the gain reduction. No hard threshold, no stepped knee: vari-mu compresses smoothly, musically, and with harmonically rich distortion that listeners describe as dense, alive, and cohesive. The Tubecore accepts four tube families in the gain-control stage: 6N1P-EW NOS (standard IGS set — \"standard IGS compression\"), 6BC8\/6BZ8 (\"tight, transparent, punchy\"), 6386 (\"legendary compression, famous twin triode\"), and 5670 (\"deep and dark tube compression\"). Each choice physically changes attack character, release behavior, and harmonic profile without any circuit modification — tube swapping is a user procedure described in the manual, performed via the rear panel.\u003c\/p\u003e\n\n  \u003ch3\u003eM\/S, Sidechain HPF, Wet\/Dry and Gain Staging\u003c\/h3\u003e\n  \u003cp\u003eMid\/Side mode via OpAmp encoder\/decoder enables independent compression of the center and side channels — a precise mastering tool for managing stereo width without disturbing the overall tonal balance. The sidechain HPF (60 Hz \/ 120 Hz \/ Off) decouples low-frequency content from the compression control circuit, eliminating pumping on material with prominent kick drum or bass. The Wet\/Dry control implements parallel compression inline without external routing. Per-channel gain staging: Input (1–24 dB) → Threshold (0 to –12 dB reduction) → Output (1–24 dB) → Wet\/Dry — all controls stepped. Two hardwire bypass positions per channel allow instant A\/B comparison without touching the settings. Maximum gain reduction is 20 dB, dynamic range above 107 dB(A).\u003c\/p\u003e\n\n  \u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDual-channel stereo vari-mu compressor, 3U 19\" format\u003c\/li\u003e\n    \u003cli\u003eFully symmetric signal path from input to output\u003c\/li\u003e\n    \u003cli\u003eTransformers: Carnhill and Sowter (input and output)\u003c\/li\u003e\n    \u003cli\u003eNOS 6N1P-EW tubes (standard); optional 6BC8\/6BZ8, 6386, 5670 — user-replaceable\u003c\/li\u003e\n    \u003cli\u003e1% metal film resistors, Wima capacitors; components matched per unit\u003c\/li\u003e\n    \u003cli\u003eInput Gain: 1–24 dB (stepped, 24-position Elma)\u003c\/li\u003e\n    \u003cli\u003eOutput Gain: 1–24 dB (stepped, 24-position Elma)\u003c\/li\u003e\n    \u003cli\u003eThreshold: 0 to –12 dB reduction\u003c\/li\u003e\n    \u003cli\u003eAttack: 0.1 \/ 0.3 \/ 1 \/ 3 \/ 10 \/ 30 ms (stepped)\u003c\/li\u003e\n    \u003cli\u003eRelease: 0.1 \/ 0.4 \/ 0.6 \/ 0.8 \/ 1.6 s \/ Auto (stepped)\u003c\/li\u003e\n    \u003cli\u003eMax gain reduction: 20 dB\u003c\/li\u003e\n    \u003cli\u003eSidechain HPF: 60 Hz \/ 120 Hz \/ Off\u003c\/li\u003e\n    \u003cli\u003eWet\/Dry Mixer: 0–100%, 4 dB steps\u003c\/li\u003e\n    \u003cli\u003eDual Mono or Mid\/Side mode (OpAmp encoder\/decoder)\u003c\/li\u003e\n    \u003cli\u003eTwo hardwire bypass positions per channel (fast A\/B)\u003c\/li\u003e\n    \u003cli\u003eInput impedance: 2500 Ω; output impedance: 600 Ω (balanced XLR)\u003c\/li\u003e\n    \u003cli\u003eMax input\/output: +22 dBu; dynamic range: \u0026gt;107 dB(A)\u003c\/li\u003e\n    \u003cli\u003eVU metering: fast analog VU per channel\u003c\/li\u003e\n    \u003cli\u003eInternal power supply; handmade in Poland\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eTECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eType: dual-channel stereo vari-mu compressor, 3U 19\"\u003c\/li\u003e\n    \u003cli\u003eInput impedance: 2500 Ω (transformer, balanced XLR)\u003c\/li\u003e\n    \u003cli\u003eOutput impedance: 600 Ω (transformer, balanced XLR)\u003c\/li\u003e\n    \u003cli\u003eOperating level: +4 dBu\u003c\/li\u003e\n    \u003cli\u003eMax input level: +22 dBu\u003c\/li\u003e\n    \u003cli\u003eMax output level: +22 dBu\u003c\/li\u003e\n    \u003cli\u003eDynamic range: \u0026gt;107 dB(A)\u003c\/li\u003e\n    \u003cli\u003eMax gain reduction: 20 dB\u003c\/li\u003e\n    \u003cli\u003eAttack: 0.1 \/ 0.3 \/ 1 \/ 3 \/ 10 \/ 30 ms\u003c\/li\u003e\n    \u003cli\u003eRelease: 0.1 \/ 0.4 \/ 0.6 \/ 0.8 \/ 1.6 s \/ Auto\u003c\/li\u003e\n    \u003cli\u003eFrequency response: 20 Hz – 20 kHz, ±0.2 dB\u003c\/li\u003e\n    \u003cli\u003eTubes: 6N1P-EW NOS (standard); optional 6BC8\/6BZ8, 6386, 5670\u003c\/li\u003e\n    \u003cli\u003eTransformers: Carnhill + Sowter\u003c\/li\u003e\n    \u003cli\u003eSidechain HPF: 60 Hz \/ 120 Hz \/ Off\u003c\/li\u003e\n    \u003cli\u003eWet\/Dry: 0–100%, 4 dB steps\u003c\/li\u003e\n    \u003cli\u003eM\/S Processing: OpAmp encoder\/decoder\u003c\/li\u003e\n    \u003cli\u003eBypass: hardwire, 2 positions per channel\u003c\/li\u003e\n    \u003cli\u003eAll controls: 24-position Elma switches\u003c\/li\u003e\n    \u003cli\u003eMade in: Poland\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e","brand":"IGS Audio","offers":[{"title":"Default Title","offer_id":54001626743121,"sku":"28179","price":2975.41,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8741\/0769\/files\/IGSAudioTUBECORE.jpg?v=1781115377","url":"https:\/\/wrdtunes.com\/en-fr\/products\/igs-audio-tubecore","provider":"Wired Tunes","version":"1.0","type":"link"}