{"product_id":"gyraf-audio-gyratec-xiv","title":"Gyraf Audio Gyratec XIV Stereo Passive Tube Equalizer","description":"\u003cp\u003eThe \u003cspan style=\"font-weight: bold;\"\u003eGyraf Audio Gyratec XIV\u003c\/span\u003e is a true tube, all passive, stereo equalizer.  It consist of five bands - each with 11 switchable frequencies, variable “Q”, and boost\/cut selection.  It also has an output level trim, and a “hard” relay bypass control.\u003cbr\u003e \u003cbr\u003e The two channels are linked - controlled with one set of knobs.  The “Q”s (filter sharpnes’es) are rather low when boosting, but higher at cut - approaching a notch on extreme cut settings.  This is both a side-effect of the applied passive technology - as well as quite desireable in situations where sound integrity is the paramount factor.\u003cbr\u003e \u003cbr\u003e The frequencies are selected with special attention to controlability of the midrange area, and with half an frequency-range overlap to the adjacent bands.\u003cbr\u003e \u003cbr\u003e This equalizer is a very extended version of the classic passive inductor\/capacitor type filters, the most famous being the “Pultec” units.  Even though the classic versions are usefull tools in most situations, they are somewhat limited in use due to their simple construction.  Our engeineers wanted - as engeineers tend to do - more of everything.\u003cbr\u003e \u003cbr\u003e So we came up with the parallel-passive design, the G14.\u003cbr\u003e \u003cbr\u003e It is a truely passive design - based on switching a set of inductors and capacitors in and out of circuit - combined with an E88CC (6DJ8) tube-based makeup gain\/output stage. Not a single IC’s or semiconductor in the signal path - this is a real tube unit.\u003cbr\u003e \u003cbr\u003e The inputs and outputs are - off course - transformer balanced, for trouble-free interfacing to the outer world.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInput impedance - around 5K Ohms, transformer balanced\u003c\/li\u003e\n\u003cli\u003eOutput impedance - ~1K Ohms, transformer balanced\u003c\/li\u003e\n\u003cli\u003eMax boost\/cut - ~10-12dB, depending on “Q” setting\u003c\/li\u003e\n\u003cli\u003eGain trim ~+6 - -20dB\u003c\/li\u003e\n\u003cli\u003eEach band individually hard-bypassable\u003c\/li\u003e\n\u003cli\u003eChannel tracking within ~1dB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFrequency markings are:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLow: 35-48-60-70-80-100-120-160-190-220-270Hz\u003c\/li\u003e\n\u003cli\u003eLow mid: 180-230-280-330-400-430-490-550-590-650-750Hz\u003c\/li\u003e\n\u003cli\u003eMid: 500-570-700-800-900-1K-1K1-1K3-1K5-1K8-2K1 Hz\u003c\/li\u003e\n\u003cli\u003eHigh mid: 950-1K2-1K4-1K7-2K-2K5-3K-3K5-4K2-5K-6K3 Hz\u003c\/li\u003e\n\u003cli\u003eHigh: 4K5-5K6-6K5-7K8-9K1-12K-14K-16K-18K-20K-22KHz\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Gyraf Audio","offers":[{"title":"Default Title","offer_id":44449254080615,"sku":"14723","price":3900.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/gyraf_audio_gyratec_xiv.jpg?v=1787088328","url":"https:\/\/vintageking.com\/products\/gyraf-audio-gyratec-xiv","provider":"Vintage King","version":"1.0","type":"link"}