{"product_id":"warm-audio-wa-2mpx-stereo-microphone-tube-preamplifier","title":"Warm Audio WA-2MPX Stereo Microphone Tube Preamplifier","description":"\u003cp\u003eBefore multitrack recording, before the electric guitar solo, before rock 'n' roll itself — there was the AMPEX 351. The tube preamp at the heart of that legendary tape machine shaped the sound of Les Paul, Elvis Presley, Nat King Cole, and Bing Crosby. The \u003cstrong\u003eWarm Audio WA-2MPX\u003c\/strong\u003e faithfully recreates that circuit in a modern 2-channel stereo unit, bringing the warmth, depth, and harmonic richness of the original to your studio.\u003c\/p\u003e\n\n\u003cp\u003eThree premium vacuum tubes per channel — two 12AX7s and one 12AU7 — deliver up to 90 dB of exceptionally clean gain, with an additional 20 dB high-gain boost for ribbon mics and low-output dynamics. Custom-wound large-core CineMag USA transformers provide the transformer coloration and low-end authority that define the vintage sound. Selectable tape saturation adds nonlinear harmonic distortion reminiscent of a tape machine running at 15 ips, while the tone switch alters input impedance to inject further color into your signal. With XLR mic, TS instrument, and TRS line inputs per channel, the WA-2MPX handles any source with authority.\u003c\/p\u003e\n\n\u003ch2\u003eWarm Audio WA-2MPX Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e2-channel authentic recreation of the AMPEX 351 tube preamp circuit\u003c\/li\u003e\n\u003cli\u003e3 tubes per channel: 2 x 12AX7, 1 x 12AU7\u003c\/li\u003e\n\u003cli\u003eUp to 90 dB of gain per channel + 20 dB high-gain boost\u003c\/li\u003e\n\u003cli\u003eCustom-wound large-core CineMag USA transformers\u003c\/li\u003e\n\u003cli\u003eSelectable tape saturation — harmonic distortion at 15 ips character\u003c\/li\u003e\n\u003cli\u003e80 Hz high-pass filter and 2 kHz low-pass filter per channel\u003c\/li\u003e\n\u003cli\u003eTone switch for input impedance and color control\u003c\/li\u003e\n\u003cli\u003ePer-channel +48V phantom power and polarity reverse\u003c\/li\u003e\n\u003cli\u003eXLR mic, TS instrument, and TRS line inputs\u003c\/li\u003e\n\u003cli\u003eBrushed aluminum faceplate with Bakelite-style knobs\u003c\/li\u003e\n\u003cli\u003eHand-tested and inspected in Austin, TX\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eArtists Who Defined the Sound\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eOriginal AMPEX 351 artists:\u003c\/strong\u003e Les Paul, Elvis Presley, Bing Crosby, Nat King Cole, Roy Orbison\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eModern artists chasing this tone:\u003c\/strong\u003e Jack White, The Black Keys, Amy Winehouse, Mark Ronson, John Mayer, St. Vincent, Arctic Monkeys, The 1975\u003c\/p\u003e\n\n\u003ch2\u003eTech Specs\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003e2-Channel Tube Microphone Preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCircuit Inspiration\u003c\/th\u003e\n\u003ctd\u003eAMPEX 351 tape machine preamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubes\u003c\/th\u003e\n\u003ctd\u003e2 x 12AX7 + 1 x 12AU7 per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Gain\u003c\/th\u003e\n\u003ctd\u003e90 dB + 20 dB boost\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTransformer\u003c\/th\u003e\n\u003ctd\u003eCineMag USA (large-core, custom-wound)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHPF\u003c\/th\u003e\n\u003ctd\u003e80 Hz per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLPF\u003c\/th\u003e\n\u003ctd\u003e2 kHz per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePhantom Power\u003c\/th\u003e\n\u003ctd\u003e+48V per channel (switchable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTape Saturation\u003c\/th\u003e\n\u003ctd\u003eSelectable per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eXLR (mic), TS (instrument), TRS (line) per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e850031640177\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Warm Audio","offers":[{"title":"Default Title","offer_id":45683581157433,"sku":"WA-2MPX","price":1399.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/9912\/9401\/files\/1679388375_IMG_1943814.jpg?v=1775576550","url":"https:\/\/www.audioproct.com\/products\/warm-audio-wa-2mpx-stereo-microphone-tube-preamplifier","provider":"AudioProCT","version":"1.0","type":"link"}