{"product_id":"warm-audio-wa-2mpx-b1","title":"Warm Audio WA-2MPX Dual-Channel Tube Microphone Preamplifier (Warehouse Deal, Demo, minor marks)","description":"\u003cp\u003eThe Warm Audio WA-2MPX is a dual-channel tube microphone preamplifier that reproduces the AMPEX 351-style preamps found in the American tape machines that defined the sound of early rock and roll, radio, and studio recording. Each channel delivers up to 90 dB of tube gain through a 300V circuit with three vacuum tubes and custom CineMag USA transformers, providing a wide tonal range from pristine clarity to rich tube saturation.\u003c\/p\u003e\n\n\u003ch3\u003eTube Circuit and Gain Staging\u003c\/h3\u003e\n\u003cp\u003eEach channel runs two 12AX7 tubes and one 12AU7 through a 300V signal path. The first 12AX7 operates as the preamplifier stage, delivering 70 dB of clean gain in standard mode. Engaging the High Gain switch brings the second triode of the first 12AX7 into the circuit, boosting available gain to 90 dB for low-output dynamic and ribbon microphones. The 12AU7 drives the push-pull output stage through a CineMag USA output transformer. The Tone switch toggles input transformer impedance between 600 and 150 Ohms for additional tonal variation.\u003c\/p\u003e\n\n\u003ch3\u003eTape Saturation\u003c\/h3\u003e\n\u003cp\u003eEach channel includes a selectable Tape Saturation switch that engages a discrete analog circuit providing compression, harmonic distortion, and non-linear frequency response to emulate the sound of tape machines running at 15 IPS. Combined with the 80 Hz high-pass and 2 kHz low-pass filters, the WA-2MPX can shape tone from full-bandwidth clarity to focused, lo-fi warmth.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e 2-channel tube mic\/line\/instrument preamplifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTopology:\u003c\/strong\u003e AMPEX 351-style, fully discrete, hand-wired\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubes per channel:\u003c\/strong\u003e 2x 12AX7, 1x 12AU7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransformers:\u003c\/strong\u003e CineMag USA (custom large-core, input and output)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e 90 dB per channel (with High Gain engaged)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCircuit voltage:\u003c\/strong\u003e 300V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilters:\u003c\/strong\u003e 80 Hz high-pass, 2 kHz low-pass (per channel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTape saturation:\u003c\/strong\u003e Selectable, emulates 15 IPS reel-to-reel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls per channel:\u003c\/strong\u003e Input gain, output level, input select, 48V, polarity, tone, high gain, HPF, LPF, tape saturation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs per channel:\u003c\/strong\u003e XLR mic, TRS line, TS instrument\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs per channel:\u003c\/strong\u003e XLR, TRS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetering:\u003c\/strong\u003e VU meter per channel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 115\/230V, IEC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack size:\u003c\/strong\u003e 2U, 19\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 483 x 222 x 89 mm (19 x 8.7 x 3.5\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.7 kg (8.2 lbs)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWarm Audio WA-2MPX\u003c\/li\u003e\n\u003cli\u003eIEC power cable\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Warm Audio","offers":[{"title":"Default Title","offer_id":50525576528121,"sku":"WA-2MPX-b1","price":2089.05,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/5766\/1177\/files\/WA-2MPX_8eb74905-f9d4-4ae9-8330-bf305e7df1b8.jpg?v=1765322145","url":"https:\/\/blackoutaudio.com\/products\/warm-audio-wa-2mpx-b1","provider":"Blackout Audio","version":"1.0","type":"link"}