{"product_id":"gyraf-audio-g14-s-parallel-passive-stereo-tube-equalizer","title":"Gyraf Audio G14-S Parallel-Passive Stereo Tube Equalizer","description":"\u003cp\u003eThe \u003cstrong\u003eGyraf Audio G14-S\u003c\/strong\u003e is a passive stereo equalizer, equipped with two different topologies for makeup gain and interfacing. The filter itself consist of five bands – each with 11 switchable frequencies, continuous variable “Q”, and individual boost\/bypass\/cut selection. The unit has an overall output level “TRIM”, and a hard relay bypass serving as reference for your work.\u003c\/p\u003e\r\n\u003cp\u003eThe stereo channels are linked – controlled with one set of knobs, so you won’t ever have to match settings of two channels. The “Q”s, filter sharpness, are rather low when boosting, but higher at cut – approaching notch behavior at extreme cut settings. This is both a side-effect of the applied passive technology – as well as quite desirable in situations where sound integrity is the paramount factor.\u003c\/p\u003e\r\n\u003cp\u003eFrequencies for the five bands have been selected with special attention to controlability of the midrange area, with approximately half a frequency-range overlap to the adjacent bands.\u003c\/p\u003e\r\n\u003cp\u003eThis equalizer technology is a very extended version of the classic passive inductor\/capacitor type filter. Although the classic versions are very useful tools in many situations, they often feel somewhat limited due to their simple construction and coverage. Gyraf's engineers wanted – as engineers tend to do – much more of everything. So Gyraf came up with the parallel-passive design, the G14.\u003c\/p\u003e\r\n\u003cp\u003eG14-S is based on this truly passive design – switching a set of inductors and capacitors in and out of circuit. This passive filter set is then matched with input\/output interfacing for trouble-free interfacing to the outer world, and a gain stage to make up for the approximate 20dB passive loss in the filters.\u003c\/p\u003e\r\n\u003cp\u003eFor this, G14-S features a selection of two different technologies – at a flick of the bypass switch: When set to “IN”, you have the traditional and much-loved selection of tube makeup gain based on 6H23n (E88CC\/6922) tubes combined with transformer-balanced input and output interfacing.\u003c\/p\u003e\r\n\u003cp\u003eIf this gets to be too much of a good thing, you switch the bypass to “S” and everything but the filter and controls are swapped with entirely different technology: The inputs are now integrated balanced differential receivers, amplification is handled by a high-grade opamp, and output is driven by state-of-the-art active servo balancing circuits. Two entirely different personalities in one box.\u003c\/p\u003e\r\n\u003cp\u003eAn important feature is that the original signal path of the classic G14 is fully preserved in the G14-S: Only parts relating to the solid-state path has been added, in “tube mode”, the G14S\u003c\/p\u003e\r\n\r\n\u003cp\u003eFrequency markings are:\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eLow: 35-48-60-70-80-100-120-160-190-220-270Hz\u003c\/li\u003e\r\n\u003cli\u003eLow mid: 180-230-280-330-400-430-490-550-590-650-750Hz\u003c\/li\u003e\r\n\u003cli\u003eMid: 500-570-700-800-900-1K-1K1-1K3-1K5-1K8-2K1 Hz\u003c\/li\u003e\r\n\u003cli\u003eHigh mid: 950-1K2-1K4-1K7-2K-2K5-3K-3K5-4K2-5K-6K3 Hz\u003c\/li\u003e\r\n\u003cli\u003eHigh: 4K5-5K6-6K5-7K8-9K1-12K-14K-16K-18K-20K-22KHz\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Gyraf Audio","offers":[{"title":"Default Title","offer_id":44450621128807,"sku":"145307","price":5225.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/gyraf-g14-s_145307_1_99ed3fb4-26d2-46dd-a9e2-40fb6b9fa89b.jpg?v=1787093794","url":"https:\/\/vintageking.mom\/products\/gyraf-audio-g14-s-parallel-passive-stereo-tube-equalizer","provider":"Vintage King","version":"1.0","type":"link"}