{"product_id":"warm-audio-wa273-b2","title":"Warm Audio WA273 Dual-Channel British Microphone Preamplifier (Warehouse Deal, Demo, minor marks)","description":"\u003cp\u003eThe Warm Audio WA273 is a dual-channel, Class A microphone preamplifier that recreates the 1073-style British console preamp. Featuring hand-wired construction with custom Carnhill UK input and output transformers and 80 dB of gain per channel through a fully discrete signal path, the WA273 delivers the rich, warm analog tone heard on classic recordings by The Beatles, Led Zeppelin, and U2.\u003c\/p\u003e\n\u003ch3\u003eCarnhill Transformers and Build\u003c\/h3\u003e\n\u003cp\u003eWarm Audio worked directly with Carnhill Transformers of Cambridgeshire, UK, to reproduce the earliest and most coveted transformer designs used in vintage 1073 consoles. These custom-wound transformers saturate smoothly when driven, contributing the fluid, musical character that defines the British preamp sound. The WA273 is hand-wired and hand-assembled, with through-hole PCB components populated by hand. Tantalum and polystyrene capacitors in the signal path and a carefully selected output transistor maintain fidelity to early British designs, delivering smoother performance in high-gain settings than typical modern reproductions.\u003c\/p\u003e\n\n\u003ch3\u003eControls\u003c\/h3\u003e\n\u003cp\u003eEach channel provides a 22-position resistor-stepped gain switch with 80 dB of range, a Tone button that toggles input transformer impedance between 1200 and 300 Ohms, and a four-position inductor-based high-pass filter at 50, 80, 160, and 300 Hz. Unbalanced send\/return insert jacks on each channel allow patching in external compressors or EQ before the output transformer. 48V phantom power, polarity inversion, and ground lift are switchable per channel.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Dual-channel, Class A, 1073-style British mic\/line\/instrument preamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTopology:\u003c\/strong\u003e Fully discrete, hand-wired, hand-assembled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransformers:\u003c\/strong\u003e Carnhill UK (custom, input and output)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e 80 dB (resistor-stepped)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-pass filter:\u003c\/strong\u003e 4-position (50, 80, 160, 300 Hz)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTone button:\u003c\/strong\u003e Switches input transformer impedance (1200\/300 Ohms)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhantom power:\u003c\/strong\u003e +48V per channel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolarity switch:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround lift:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs per channel:\u003c\/strong\u003e XLR mic, TRS line, TS instrument, TS insert send\/return\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs per channel:\u003c\/strong\u003e XLR, TRS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency response:\u003c\/strong\u003e 20 Hz - 20 kHz (+\/- 0.5 dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 115\/230V, internal IEC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack size:\u003c\/strong\u003e 1U, 19\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWarm Audio WA273\u003c\/li\u003e\n\u003cli\u003eIEC power cable\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Warm Audio","offers":[{"title":"Default Title","offer_id":50525582622969,"sku":"WA273-b2","price":1709.05,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/5766\/1177\/files\/WA273.jpg?v=1765322113","url":"https:\/\/blackoutaudio.com\/products\/warm-audio-wa273-b2","provider":"Blackout Audio","version":"1.0","type":"link"}