{"product_id":"charteroak-sa538b-used","title":"CharterOak SA538B (Used)","description":"\u003cp\u003eExcellent example of this mic set. comes with PSU, mic cable, shock mount and flight case. \u003cbr\u003e\u003c\/p\u003e\u003cp\u003eThe \u003cspan style=\"font-weight: bold;\"\u003eSA538B \u003c\/span\u003eis a condenser  microphone that employs two large, ultra-thin, side terminated gold  diaphragms and a vacuum tube head amplifier using a selected low noise  tube, and output transformer. As a result, the model SA538B has very low  inherent noise and broad dynamic range. Its timbre is distinctive. Its  rich and balanced sound makes it an ideal choice to ensure extremely  high quality sound reproduction.\u003cbr\u003e\u003cbr\u003eThe high standard of quality and  affordability of the CharterOak SA538B have been achieved through an  extended period of research and development, including beta testing by a  wide variety of end users.\u003cbr\u003e\u003cbr\u003eThe parts of the CharterOak SA538B are machined from solid brass and high quality electronic components are used throughout.\u003cbr\u003e\u003cbr\u003eThe  process of creating a CharterOak SA538B Condenser Microphone is started  by hand under the strict supervision of CharterOak personnel. Under  that supervision the parts are quality checked and assembled at our  facility in Connecticut.\u003cbr\u003e\u003cbr\u003eThe microphones are finished and the  parts are quality checked a second time by experienced engineers. The  process involves a seven (7) day burn in of the vacuum tube and no less  than _ hour spent with each microphone in a studio environment. Careful  listening tests employ high quality microphone preamplifiers and high  resolution monitoring systems. Quality checks on every component of each  kit complete the process.\u003cbr\u003e\u003cbr\u003eIt is only after this exhaustive  finishing and quality control process is complete, that an SA538B will  be cleared for sale to the customer.\u003cbr\u003e\u003cbr\u003eFrom the research and  development to the delivery of every SA538B, it is this attention to  detail that makes the SA538B truly unique in its class.\u003c\/p\u003e\u003cbr\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecifications\u003c\/span\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eAcoustical Operating Principle:    Pressure Gradient\u003c\/li\u003e\n\u003cli\u003eDiaphragm:    Dual 1.07\" 6 micron thick gold sputtered Mylar\u003c\/li\u003e\n\u003cli\u003eFrequency Response:    25Hz-20kHz\u003c\/li\u003e\n\u003cli\u003eSensitivity:    12mV\/Pa 0dB=1V\/Pa@1kHz\u003c\/li\u003e\n\u003cli\u003ePolar Pattern:    Cardioid, Omni, Figure-8, and intermediate stages selectable from power supply\u003c\/li\u003e\n\u003cli\u003eImpedance:    \u0026lt; 200 Ohms\u003c\/li\u003e\n\u003cli\u003eRecommended Load:    \u0026gt; 200 Ohms\u003c\/li\u003e\n\u003cli\u003eEquivalent Input Noise:    20dB A weighted IEC651\u003c\/li\u003e\n\u003cli\u003eMaximum Sound Pressure Level:    125dB for 0.5% total harmonic distortion @ 1kHz\u003c\/li\u003e\n\u003cli\u003ePower Requirements:    Custom supply 115V or 230V operation with IEC type 2 AC Cable\u003c\/li\u003e\n\u003cli\u003eConnection between Mic \u0026amp; Power Supply:    7 pin XLR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CharterOak","offers":[{"title":"Default Title","offer_id":44449494532199,"sku":"17811","price":495.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/used_charteroak_sa538b_set_5ed378a6-9730-4742-addf-c6d78d8d7ec6.jpg?v=1787089195","url":"https:\/\/vintageking.mom\/products\/charteroak-sa538b-used","provider":"Vintage King","version":"1.0","type":"link"}