{"product_id":"audio-research-i-55-integrated-amplifier","title":"Audio Research I\/55 Integrated Amplifier","description":"\u003cp\u003eThe I\/55 is a successor to Audio Research's I\/50 integrated amplifier, carrying over technology developed for the larger I\/70 while keeping the I\/50's compact size and power.\u003c\/p\u003e\u003cp\u003eIt is an all-tube design with two matched pairs of 6550 power tubes and 6922 input tubes, adding auto-bias that the I\/50 lacked, with an independent active tube preamp section, an AKM Velvet Sound DAC with USB, optical, coaxial, and Bluetooth inputs, and an optional phono card with adjustable MC loading.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePower: 50W continuous (20Hz to 20kHz), approximately 1% THD at rated output, under 0.1% at 1W\u003c\/li\u003e\n\u003cli\u003eTubes: two matched pairs 6550WE output, three 6922 input\/driver\u003c\/li\u003e\n\u003cli\u003eInputs: 4 total, 1 balanced XLR plus 3 single-ended RCA; pre-out; 8\/4 ohm taps\u003c\/li\u003e\n\u003cli\u003eHeadphone output: yes, driven by the 6550s\u003c\/li\u003e\n\u003cli\u003eOptional phono card: MC\/MM gain, loading 50 to 1000 ohms\u003c\/li\u003e\n\u003cli\u003eBuilt-in DAC: USB, optical, coax, Bluetooth\u003c\/li\u003e\n\u003cli\u003eDimensions: 16.5 in W x 7.25 in H x 13.5 in D\u003c\/li\u003e\n\u003cli\u003eWeight: 40 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":53145005850941,"sku":"ARC-I55","price":6950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1021\/5741\/8813\/files\/Product-grid-I-55.jpg?v=1790262922","url":"https:\/\/audio-concepts.com\/products\/audio-research-i-55-integrated-amplifier","provider":"AudioConcepts","version":"1.0","type":"link"}