{"title":"Tube Mic Preamps for Recording Studios | Pro Audio Reserve","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eTube microphone preamps add harmonic density and tonal weight that solid-state circuits don't produce. Every preamp in this collection is chosen for engineers who want genuine tube character in their recording chain, not a solid-state unit with a tube in the output stage for appearance. Free US shipping. 90-Day Compatibility Guarantee on every order.\u003c\/p\u003e","products":[{"product_id":"warm-audio-wa-2mpx","title":"Warm Audio WA-2MPX Tube Mic Preamp","description":"\u003c!-- PRODUCT INTRO --\u003e\u003c!-- Video Section with Keyword Title --\u003e\n\u003cdiv style=\"margin: 20px auto 10px auto; text-align: center; max-width: 800px;\"\u003e\n\u003ch2 style=\"font-size: 20px; margin-bottom: 12px;\"\u003eWarm Audio WA-2MPX Tube Preamp Overview\u003c\/h2\u003e\n\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/wFZAAdPaSEI?si=oyqTgrx_jsHmTR20\" style=\"width: 100%; max-width: 800px; height: 450px; display: block; margin: 0 auto; border-radius: 8px;\"\u003e\n  \u003c\/iframe\u003e\n\u003c\/div\u003e\n\u003c!-- Section 1: Image Left, Text Right --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/WA2MPX_Dual_Channel_PreAmp_front_view_1.png?v=1765685861\" alt=\"Warm Audio WA-2MPX tube mic preamp front panel with VU meters\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eClassic Tape-Era Tone with Real Tube Depth\u003c\/h2\u003e\n\u003cp\u003eThe WA-2MPX captures the essence of the classic 351-style tube electronics that shaped countless radio-ready recordings. Its tube-driven gain structure adds body and harmonic richness that feels natural on vocals, guitars, drums, and keyboards.\u003c\/p\u003e\n\u003cp\u003eFrom subtle enhancement to bold coloration, this preamp lets you decide how much character you want to commit on the way in, making it a powerful creative tool during tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 2: Image Right, Text Left --\u003e\n\u003cdiv class=\"par-section reverse\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/WA2MPX_interior_view_1.png?v=1765685839\" alt=\"Warm Audio WA-2MPX dual-channel tube preamp controls and switches\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eFlexible Gain Structure for Modern Sessions\u003c\/h2\u003e\n\u003cp\u003eWarm Audio stayed true to the original circuit while adding features that make the WA-2MPX far more adaptable in today’s studios. The tape saturation switch lets you fine-tune harmonic density, while the classic tone switch adjusts mic input impedance for additional color or microphone optimization.\u003c\/p\u003e\n\u003cp\u003eWith up to 70dB of gain, or 90dB when High Gain is engaged, the WA-2MPX easily handles low-output microphones, including passive ribbons, even on quiet sources.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 3: Image Left, Text Right --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/WA2MPX_dual_view_1.png?v=1765685850\" alt=\"Warm Audio WA-2MPX rear panel XLR and TRS connections\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eBuilt for Hybrid and Professional Workflows\u003c\/h2\u003e\n\u003cp\u003eEach channel includes mic, line, and instrument inputs, along with balanced XLR and TRS outputs for seamless integration into studio and live rigs. Highpass and lowpass filters help shape sources quickly, while polarity reverse and phantom power keep sessions moving smoothly.\u003c\/p\u003e\n\u003cp\u003eThe solid metal chassis, internal universal power supply, and hand-tested construction make the WA-2MPX a reliable front end for studio, mobile, and location recording.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- HIGHLIGHTS --\u003e\n\u003ch3\u003eKey Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDual-channel tube mic, line, and instrument preamp inspired by classic 351 circuitry\u003c\/li\u003e\n\u003cli\u003eUp to 90dB of tube gain with High Gain mode engaged\u003c\/li\u003e\n\u003cli\u003eSelectable tape saturation and classic tone impedance switch\u003c\/li\u003e\n\u003cli\u003eCustom-wound large-core CineMag USA transformers\u003c\/li\u003e\n\u003cli\u003eHighpass and lowpass filters for fast tone shaping\u003c\/li\u003e\n\u003cli\u003eHandwired, hand assembled, and tested in Austin, Texas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- INTERNAL LINKS --\u003e\n\u003cp\u003eIf you’re building a premium front end, explore more options in our \u003ca href=\"https:\/\/proaudioreserve.com\/collections\/pre-amps-for-sale?grid_list=grid-view\u0026amp;filter.v.price.gte=\u0026amp;filter.v.price.lte=\" rel=\"noopener\" target=\"_blank\"\u003emicrophone preamps collection\u003c\/a\u003e, \u003c\/p\u003e\n\u003c!-- TECHNICAL SPECIFICATIONS --\u003e\n\u003ch3\u003eWarm Audio WA-2MPX Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc; width: 35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePreamp Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eTube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eNumber of Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePhantom Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePolarity Switch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eEQ\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e80Hz highpass filter, 2kHz lowpass filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eTubes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e4 x 12AX7, 2 x 12AU7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eAnalog Inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e2 x XLR, 2 x 1\/4\" TRS, 2 x 1\/4\" Hi-Z (front)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eAnalog Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e2 x XLR, 2 x 1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e20Hz-20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eRack Spaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e2U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePower Source\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eStandard IEC AC cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e19\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eWA-2MPX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- WHAT’S IN THE BOX --\u003e\n\u003ch3\u003eWhat’s in the Box\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eIncluded Items\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eWarm Audio WA-2MPX 2-channel tube preamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eIEC power cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Warm Audio","offers":[{"title":"Default Title","offer_id":47709026255003,"sku":"WA2MPX","price":1499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/WA2MPX_Dual_Channel_PreAmp_front_view_1.png?v=1765685861"},{"product_id":"useful-arts-sfp-30-tube-microphone-preamp","title":"Useful Arts SFP-30 Single Channel Tube Microphone Preamp","description":"\u003ch2 style=\"text-align: center;\"\u003eUseful Arts SFP-30 Single Channel Tube Microphone Preamp\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Section 1 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg alt=\"Useful Arts SFP-30 single channel tube microphone preamp\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/USEFUL_ARTS_SPF-30_FRONT.png?v=1770160983\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eArtfully Curated Tubes for Forward, Punchy Sound\u003c\/h2\u003e\n\u003cp\u003eUseful Arts designed the SFP-30 to be clear, present, and edgy rather than dark and creamy, specifically targeting vocals that sound forward and intimate. The carefully curated tube selection employs an EF-806 pentode for the input stage, adding third-order harmonics that contribute to clarity and bite. Two high-current ECC82 triodes handle the final gain stages, producing second-order harmonic content that adds richness and thickness without sounding dark.\u003c\/p\u003e\n\u003cp\u003eYou won't find the pedestrian 12AX7 anywhere in the SFP-30's signal path. Instead, Useful Arts selected tubes specifically for what they do best — bringing out harmonics that increase clarity and euphonics. Each gain stage is single-ended Class A, ensuring the purest possible signal path with minimal distortion artifacts when running clean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 2 --\u003e\n\u003cdiv class=\"par-section reverse\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg alt=\"Useful Arts SFP-30 Color control knob harmonic distortion\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/USEFUL_ARTS_SPF-30_FRONT.png?v=1770160983\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eVariable Color Control: From Polite to Aggressive\u003c\/h2\u003e\n\u003cp\u003eUnlike preamps designed to maintain a fixed distortion-to-gain ratio, the SFP-30's Color knob puts artistic choice directly in your hands. At a setting of zero, the preamp sounds squeaky clean and polite. Fully engaged, it adds around 10 dB of gain and increases distortion artifacts nearly tenfold, delivering a full, aggressive sound that sits boldly in a mix and commands attention.\u003c\/p\u003e\n\u003cp\u003eThis incredibly broad creative range allows the SFP-30 to serve up very different sounds for different sources, tracks, and musical genres. The harmonic distortion has a psychoacoustic spectral effect that humans perceive similarly to equalization, but instead of filtering existing frequencies, the tube preamp is actually adding harmonic content that isn't in the original signal — and Useful Arts has made that distortion sound absolutely amazing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 3 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg alt=\"Useful Arts SFP-30 Audio Magnetics transformers CineMag\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/USEFUL_ARTS_SPF-30_FRONT.png?v=1770160983\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003ePremium Transformers and Maximum Headroom\u003c\/h2\u003e\n\u003cp\u003eThe SFP-30 features Audio Magnetics input and output transformers custom-wound by CineMag, including a plate inductor and an output transformer with 50% nickel core. This transformer design contributes to the preamp's flat frequency response of 20 Hz to 30 kHz (±2 dB) while maintaining the musical character Useful Arts is known for.\u003c\/p\u003e\n\u003cp\u003eCombined with the high-voltage power supply delivering over 270 volts, the SFP-30 offers massive headroom with over 60 dB of usable gain. Input and output levels of the triode stages are separately controllable via detented attenuators, and combined with the Color knob, this gives you precise control over both gain structure and tonal character.\u003c\/p\u003e\n\u003ch3\u003eHighlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-channel Class A tube preamp with identical circuitry to the SFP-60\u003c\/li\u003e\n\u003cli\u003eEF-806 pentode input stage and dual ECC82 triode gain stages\u003c\/li\u003e\n\u003cli\u003eVariable Color control for adjustable harmonic distortion (clean to aggressive)\u003c\/li\u003e\n\u003cli\u003eAudio Magnetics transformers custom-wound by CineMag with 50% nickel core output\u003c\/li\u003e\n\u003cli\u003eOver 60 dB of usable gain with maximum headroom\u003c\/li\u003e\n\u003cli\u003eHigh-voltage soft-start power supply delivering over 270 volts\u003c\/li\u003e\n\u003cli\u003eSealed gold-plated relays for all switching functions\u003c\/li\u003e\n\u003cli\u003eFront-panel instrument input and rear-panel XLR mic input\u003c\/li\u003e\n\u003cli\u003eSwitchable phantom power, pad, phase reverse, and highpass filter\u003c\/li\u003e\n\u003cli\u003eCompact tabletop design with aircraft-grade aluminum faceplate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUseful Arts SFP-30 Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc; width: 35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePreamp Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eAll-tube, single-ended Class A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eNumber of Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eTubes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1 x JJ EF-806 pentode, 2 x JJ ECC82 triodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e20 Hz – 30 kHz, ±2 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eUsable Gain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eOver 60 dB (including Color knob engagement)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eTransformers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eAudio Magnetics input\/output, custom-wound by CineMag; 50% nickel core output transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSeparate regulated DC supplies for filaments, phantom, and high voltage (270V+)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePhantom Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e+48V switchable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eInput Pad\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e-22 dB switchable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eHighpass Filter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSwitchable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePhase Reverse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSwitchable polarity reverse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eAnalog Inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1 x rear-panel XLR (mic), 1 x front-panel 1\/4\" (instrument)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eAnalog Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1 x XLR (transformer-balanced line output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eMetering\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eVU meter (op-amp buffered)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePower Source\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eStandard IEC AC cable (115\/230V selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eDimensions (H x W x D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e4.5\" x 9\" x 10\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e8 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e0.190\" aircraft-grade aluminum faceplate, fully modular design, gold-plated connectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eIncluded Items\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eUseful Arts SFP-30 Tube Microphone Preamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003ePower Cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eUser Documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Useful Arts","offers":[{"title":"Default Title","offer_id":47944209072283,"sku":"SFP-30","price":1299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/USEFUL_ARTS_SPF-30_FRONT.png?v=1770160983"},{"product_id":"useful-arts-sfp-60-dual-tube-microphone-preamp","title":"Useful Arts SFP-60 Dual Channel Tube Microphone Preamp","description":"\u003ch2 style=\"text-align: center;\"\u003eUseful Arts SFP-60 Dual Channel Tube Microphone Preamp\u003c\/h2\u003e\n\u003c!-- Video Section with Keyword Title --\u003e\n\u003cdiv style=\"margin: 20px auto 10px auto; text-align: center; max-width: 800px;\"\u003e\n\u003ch2 style=\"font-size: 20px; margin-bottom: 12px;\"\u003eUseful Arts SFP-60 Tube Preamp Demo\u003c\/h2\u003e\n\u003ciframe style=\"width: 100%; max-width: 800px; height: 450px; display: block; margin: 0 auto; border-radius: 8px;\" src=\"https:\/\/www.youtube.com\/embed\/lgjeA7T1fsA?si=UKSnZhX7Mgcbo2wz\"\u003e\n  \u003c\/iframe\u003e\n\u003c\/div\u003e\n\u003c!-- Section 1 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg alt=\"Useful Arts SFP-60 dual channel tube microphone preamp\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Useful_arts_sfp_top_view.png?v=1770159636\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eClear, Present, and Forward Vocal Character\u003c\/h2\u003e\n\u003cp\u003eThe sound of the Useful Arts SFP-60 is more clear, present, and edgy than dark and creamy, specifically designed to make vocals sound forward and intimate. This is accomplished by using tubes for what they are best at — accentuating harmonics that make sound more clear and pleasing to the ear in the real world.\u003c\/p\u003e\n\u003cp\u003eEach channel features an EF-806 pentode input tube that adds third-order harmonic content contributing to the clarity and bite associated with great early radio recordings. The final two gain stages use high-current ECC82 triodes that contribute second-order harmonic components, adding richness and thickness to the sound without sounding dark. The pedestrian 12AX7 — wonderful in guitar amps but common in mass-market tube preamps — is nowhere to be found in the SFP-60.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 2 --\u003e\n\u003cdiv class=\"par-section reverse\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg alt=\"Useful Arts SFP-60 Color control variable harmonic distortion\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Useful_arts_sfp_60_front_view.png?v=1770159635\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eVariable Color Control for Artistic Distortion\u003c\/h2\u003e\n\u003cp\u003eUnlike most preamps designed to maintain a predetermined ratio of distortion to gain, the SFP-60 puts the artistic choice of distortion directly in your hands. At a Color setting of zero, the preamp is very clean and sounds polite. At a setting of ten, it adds about 10 dB of gain and increases distortion artifacts by nearly ten times, resulting in an aggressive, full sound that stands out in a mix and grabs the listener's attention.\u003c\/p\u003e\n\u003cp\u003eThe character of harmonic distortion in the SFP-60 has a spectral effect that feels EQ-related but is completely different from equalization. While EQ filters give you more or less of what you put in (along with undesirable phase shifts), the preamp is actually adding signal that isn't present in the original — and every audio device ever made introduces distortion, so Useful Arts made it a good thing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 3 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg alt=\"Useful Arts SFP-60 transformer balanced inputs outputs\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/USEFUL_ARTS_SPF-30_REAR_1.png?v=1770161444\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eOver 60dB of Usable Gain With Maximum Headroom\u003c\/h2\u003e\n\u003cp\u003eThe input and output levels of the triode stages in the SFP-60 are separately controllable by detented attenuators, and combined with the Color control, the SFP-60 provides just over 60 dB of usable gain. The high-voltage soft-start power supply delivers over 270 volts of clean, regulated power to ensure maximum headroom and the lowest noise floor possible.\u003c\/p\u003e\n\u003cp\u003eFrequency response is flat within 2 dB from 20 Hz to 20 kHz. Each channel features transformer-balanced inputs and outputs using gold-plated XLR connectors, along with an op-amp buffered VU meter that ensures the signal is not loaded by the metering circuit. The audio power supply features a toroidal dual-primary transformer and linear regulation for lowest noise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eHighlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-channel Class A tube preamp with single-ended design\u003c\/li\u003e\n\u003cli\u003eEF-806 pentode input stages and dual ECC82 triode gain stages per channel\u003c\/li\u003e\n\u003cli\u003eVariable Color control for adjustable harmonic distortion (polite to aggressive)\u003c\/li\u003e\n\u003cli\u003eOver 60 dB of usable gain with maximum headroom\u003c\/li\u003e\n\u003cli\u003eHigh-voltage soft-start power supply delivering over 270 volts\u003c\/li\u003e\n\u003cli\u003eTransformer-balanced inputs and outputs with gold-plated XLR connectors\u003c\/li\u003e\n\u003cli\u003eSealed gold-plated relays for all switching functions (no signal passes through switches)\u003c\/li\u003e\n\u003cli\u003eDual front-panel instrument inputs and rear-panel XLR mic inputs\u003c\/li\u003e\n\u003cli\u003eSwitchable phantom power, pad, phase reverse, and high-pass filter per channel\u003c\/li\u003e\n\u003cli\u003eVU meters per channel (op-amp buffered)\u003c\/li\u003e\n\u003cli\u003eAircraft-grade aluminum faceplate with laser-engraved markings\u003c\/li\u003e\n\u003cli\u003e2U rackmount design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUseful Arts SFP-60 Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc; width: 35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePreamp Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eAll-tube, single-ended Class A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eNumber of Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eTubes (Per Channel)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1 x JJ EF-806 pentode, 1 x JJ ECC82 triode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e20 Hz – 20 kHz, ±2 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eUsable Gain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eOver 60 dB (including Color knob engagement)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSeparate regulated DC supplies for filaments, phantom, and high voltage (270V+); toroidal dual-primary transformer with linear regulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePhantom Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e+48V switchable per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eInput Pad\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e-22 dB switchable per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eHigh-Pass Filter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSwitchable per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePhase Reverse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSwitchable polarity reverse per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eColor Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eVariable harmonic distortion per channel (0-10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eAnalog Inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e2 x rear-panel XLR (mic), 2 x front-panel 1\/4\" (instrument)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eAnalog Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e2 x XLR (transformer-balanced line outputs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eMetering\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eDual VU meters (op-amp buffered)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePower Source\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eStandard IEC AC cable (115\/230V selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eRack Spaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e2U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e0.190\" aircraft-grade aluminum faceplate (dark green anodized), fully modular design, gold-plated connectors, laser-engraved markings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eIncluded Items\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eUseful Arts SFP-60 Dual Channel Tube Microphone Preamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003ePower Cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eUser Documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Useful Arts","offers":[{"title":"Default Title","offer_id":47944209957019,"sku":"SFP-60","price":2999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Useful_arts_sfp_60_front_view.png?v=1770159635"},{"product_id":"kahayan-12k72-mono-microphone-preamp","title":"Kahayan 12K72 Mono Microphone Preamp","description":"\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003c!-- Video Section --\u003e\n\u003cdiv style=\"margin: 20px auto 10px auto; text-align: center; max-width: 800px;\"\u003e\n\u003ch2 style=\"font-size: 20px; margin-bottom: 12px;\"\u003eKahayan 12K72 Overview\u003c\/h2\u003e\n\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/t_uojNK2PSg?si=qlmo1hc93EcZ9uaM\" style=\"width: 100%; max-width: 800px; height: 450px; display: block; margin: 0 auto; border-radius: 8px;\"\u003e\n  \u003c\/iframe\u003e\n\u003c\/div\u003e\n\u003c!-- Section 1 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Kahayan12K72MonoMicrophonePreampfrontonview.png?v=1772257772\" alt=\"Kahayan 12K72 mono microphone preamp front panel\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eThe 1272 Sound — Built the Way It Was Meant to Be Built\u003c\/h2\u003e\n\u003cp\u003eThe Neve 1272 is one of the most revered mic preamp circuits ever designed. Deep, authoritative bass. Treble that's natural and open rather than hyped or aggressive. A transparency that makes every source sound more like itself — just bigger and more present. The Kahayan 12K72 is built around that same topology, running pure Class A from input to output with Carnhill transformers and discrete components throughout. No integrated circuits. No shortcuts.\u003c\/p\u003e\n\u003cp\u003eEvery part inside — the wires, rotary switches, capacitors, resistors, and connectors — was sourced from the same manufacturers that originally supplied components for the circuits that inspired this design. This isn't reverse-engineered approximation. It's the real topology, built with real materials, the way it was always supposed to sound.\u003c\/p\u003e\n\u003cp\u003eAs an authorized dealer, Pro Audio Reserve ensures your Kahayan 12K72 is genuine, backed by full manufacturer warranty and support.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 2 --\u003e\n\u003cdiv class=\"par-section reverse\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Kahayan12K72MonoMicrophonePreampfrontview.png?v=1772257772\" alt=\"Kahayan 12K72 rackmount Class A mic preamp studio setup\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eTwo Stages. Total Tonal Control.\u003c\/h2\u003e\n\u003cp\u003eThe 12K72 runs two gain stages with independent control over each. The first stage is governed by the Gain control in 5dB steps — setting the initial amplification and transformer character. The Output control in 1dB steps then regulates how much signal passes from the first stage into the second, functioning exactly like a console fader. Drive the first stage hard for transformer saturation, then pull the output back to a workable level — or run both in balance for the cleanest possible capture.\u003c\/p\u003e\n\u003cp\u003eThis two-stage architecture is what makes the 12K72 as useful in mastering and mix bus processing as it is for tracking. In line mode, it becomes a powerful tool for adding transformer weight and Class A character to pre-recorded material without altering the fundamental dynamics of the source.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 3 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Kahayan12K72MonoMicrophonePreampfrontonview.png?v=1772257772\" alt=\"Kahayan 12K72 rear panel XLR and 1\/4 inch I\/O connections\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eEvery Input You Need — Balanced, Unbalanced, and Hi-Z\u003c\/h2\u003e\n\u003cp\u003eA balanced XLR mic input handles your microphones with full transformer coupling, while the front-panel 1\/4\" Hi-Z input accepts guitars, bass, synths, and any high-impedance instrument directly — running through the same Class A circuit and Carnhill transformers for a DI tone with real character and depth.\u003c\/p\u003e\n\u003cp\u003eBoth balanced XLR and unbalanced 1\/4\" outputs give you the flexibility to integrate the 12K72 into any signal chain. 48V phantom power with indicator light, phase reverse, and mic\/line switching round out a feature set that covers every scenario a working session will throw at a single-channel preamp.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eHighlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-channel Neve 1272-inspired pure Class A preamp with Carnhill transformers — no ICs anywhere in the signal path\u003c\/li\u003e\n\u003cli\u003eStepped Gain control in 5dB increments and Output level control in 1dB steps for precise two-stage shaping\u003c\/li\u003e\n\u003cli\u003eLine mode makes it an effective mastering and mix bus processor for adding transformer character to pre-recorded tracks\u003c\/li\u003e\n\u003cli\u003eFront-panel Hi-Z instrument input for Class A DI recording of guitar, bass, and synth\u003c\/li\u003e\n\u003cli\u003eBalanced XLR and unbalanced 1\/4\" I\/O, 48V phantom power, phase reverse, and mic\/line switching\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKahayan 12K72 Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc; width: 35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSingle-Channel Class A Mic\/Line Preamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eTopology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003ePure Class A, fully discrete (no ICs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eTransformers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eCarnhill (input and output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eGain Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eStepped, 5dB increments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eOutput Level Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eStepped, 1dB increments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePhantom Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e48V with pilot light\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePhase Reverse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eMic Input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1 x XLR (balanced)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eHi-Z Instrument Input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1 x 1\/4\" TRS (front panel, unbalanced)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eLine Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1 x XLR (balanced), 1 x 1\/4\" TS (unbalanced)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eExternal power supply, 110–220V AC, 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eRack Spaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1.7\" H x 17.1\" W x 14\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eBody Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eIron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eIncluded Items\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eKahayan 12K72 Mono Microphone Preamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eExternal Power Supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eUser Documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Kahayan","offers":[{"title":"Default Title","offer_id":48063174672539,"sku":null,"price":1399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Kahayan12K72MonoMicrophonePreampfrontonview.png?v=1772257772"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/collections\/Tube_mic_preamp.png?v=1780588376","url":"https:\/\/proaudioreserve.com\/collections\/tube-mic-preamps.oembed","provider":"Pro Audio Reserve","version":"1.0","type":"link"}