{"product_id":"audio-research-i-70-integrated-amplifier","title":"Audio Research I\/70 Integrated Amplifier","description":"\u003cp\u003eThe I\/70 integrated amplifier combines Audio Research tube preamp and power amp technology into a compact, elegant design inspired by the flagship REF330M. Using four KT120 tubes and the Reference 75 output transformer it delivers 70 watts per channel with powerful dynamics, detail and control. Features include auto-bias, a 75-step volume control, balanced and single-ended inputs, headphone output driven by the output tubes and optional DAC and phono modules. The DAC supports USB, optical, coaxial and Bluetooth inputs with high-resolution upsampling. Hand-built and individually auditioned in Minnesota the I\/70 offers high-end tube performance in a versatile all-in-one package.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Output:\u003c\/strong\u003e 70 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\u003e 100K 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\u003e100K ohms Balanced, 50K ohms SE ; 8 Inputs – 4 balanced, 4 single-ended\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Taps:\u003c\/strong\u003e 8 ohms, 4 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e 105-130VAC 60Hz (210-250VAC 50Hz) ; 420 watts at rated output, 220 watts at “idle.”\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube Required:\u003c\/strong\u003e 2 matched pair KT120; 3-6922 (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\u003e16.5” (42 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e 8.25” (21 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDepth: \u003c\/strong\u003e13.5” (34 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 55 lbs (25 kg); 66 lbs (30 kg) shipping weight\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Silver","offer_id":51597298106656,"sku":null,"price":9950.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":51597298139424,"sku":null,"price":9950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/3728\/1568\/files\/editARi70silverfrontwhitebackground.jpg?v=1778364503","url":"https:\/\/salon1audio.com\/products\/audio-research-i-70-integrated-amplifier","provider":"Salon 1 Audio","version":"1.0","type":"link"}