{"product_id":"audio-research-i-55-integrated-amplifier","title":"Audio Research I\/55 Integrated Amplifier","description":"\u003cp\u003eThe I\/55 integrated amplifier builds on the I\/70’s advancements while maintaining the compact size and output of the I\/50. Its all-tube design uses matched 6550 output tubes and 6922 input tubes to deliver the musicality, bass depth and dynamic expression Audio Research is known for. New features include auto-bias, a more capable active preamp section, headphone output driven by the output tubes and stereo preamp outputs. Optional DAC and phono modules add high-resolution digital and analog flexibility, including USB, Bluetooth, balanced XLR inputs and adjustable MC\/MM phono settings. The I\/55 combines versatility, refinement, and classic tube performance in a compact package.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eColors:\u003c\/strong\u003e All I\/55 units come with black power button; knobs can be black or two tone. Chassis parts available in\u003cbr\u003eblack and silver. Top plate color options include: black, blue, gold, red, silver, or white. Color must be chosen at time of order; top plates are not interchangeable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Output:\u003c\/strong\u003e 50 watts continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% per channel, below 0.1% at 1 watt (Note that actual power output is dependent upon both line voltage and “condition” i.e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not critical)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Bandwidth:\u003c\/strong\u003e (-3dB points) 10Hz to 22kHz\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response: \u003c\/strong\u003e(-3dB points at 1 watt) 7Hz to 30kHz\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Sensitivity:\u003c\/strong\u003e 1.25V RMS for rated output\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance: \u003c\/strong\u003e100K ohms Balanced, 48K ohms Single Ended\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Polarity:\u003c\/strong\u003e Non-inverting. Balanced input pin 2+ (IEC-268)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 100K ohms Balanced, 50K ohms SE ; 8 Inputs – 4 balanced, 4 single-ended\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Taps: \u003c\/strong\u003e8 ohms, 4 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e 105-130VAC 60Hz (210-250VAC 50Hz) 252 watts at rated output\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube Required:\u003c\/strong\u003e 2 matched pairs 6550WE; 3 x 6922 (1 input, 2 driver)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWidth:\u003c\/strong\u003e 16.5” (42 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeigh\u003c\/strong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e\u003cstrong\u003et: \u003c\/strong\u003e7.25” (18 cm)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDepth:\u003c\/strong\u003e 13.5” (34 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight: \u003c\/strong\u003e40 lbs (18.1 kg); 51 lbs (23.1kg) shipping weight\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Silver","offer_id":51601705402656,"sku":null,"price":6950.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":51601705435424,"sku":null,"price":6950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/3728\/1568\/files\/editARi55silverfront.jpg?v=1778525284","url":"https:\/\/salon1audio.com\/products\/audio-research-i-55-integrated-amplifier","provider":"Salon 1 Audio","version":"1.0","type":"link"}