{"product_id":"audio-research-ph9-phono-stage-open-box","title":"Audio Research - PH9 Phono Stage  (Black)","description":"\u003cp\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/audioresearch.com\/new_website\/\" title=\"Audio Research\" rel=\"noopener\" target=\"_blank\"\u003eAudio Research\u003c\/a\u003e - PH9 Phono Stage  (Black)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/thesourceav.com\/search?q=audio+research\u0026amp;_pos=1\u0026amp;_psq=audio\u0026amp;_ss=e\u0026amp;_v=1.0\" title=\"Audio Research to The Source AV Design Group\" rel=\"noopener\" target=\"_blank\"\u003ePH9\u003c\/a\u003e Phono Preamplifier is a great pairing with most cartridge and turntable combinations. A trio of 6H30 vacuum tubes is at the core of a simple and clear signal path to provide the most transparent preamplification possible. Five different impedance settings allow for cartridge loading, which can be changed on the fly with the included metal remote. Cartridge impedance, tube hours, auto shutdown, and other features are included in the menu system.\u003c\/p\u003e\n\u003cp\u003eSince 1970, High Definition has been more than our trademark; it has been our guiding principle for all products. The Foundation Series continues this passion and philosophy, offering the listener stunning playback, great value, and unparalleled long-term support.\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4 class=\"specs-title\"\u003eElectronic Specifications\u003c\/h4\u003e\n\u003chr class=\"specs-separator\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFREQUENCY RESPONSE\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e±.2 dB of RIAA, 5 Hz to 20kHz; 1 dB points below 0.3Hz and above 80 kHz.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDISTORTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eLess than .015% at 3V RMS 1kHz output.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eGAIN\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e55 dB at 1 kHz\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eINPUT IMPEDANCE\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eSelectable loads: 47k, 1000, 500, 200, 100 Ohms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOUTPUT IMPEDANCE\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e200 ohms. Recommended load 50k-100k Ohms and 100 pF. (10k Ohms\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eminimum and 2000 pF maximum).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOUTPUT POLARITY\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNon-inverting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eMAXIMUM INPUT\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e80 mV RMS at 1kHz.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRATED OUTPUTS\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e0.5V RMS 10 Hz to 60 kHz, into 100K ohm load (maximum balanced output\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ecapability is 0.46V RMS at less than 0.5% THD at 1kHz).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCONTROLS\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e6 Push Buttons: \u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cwbr\u003e\u003cspan\u003ePower, Menu, Option, Enter, Input, Mute.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePOWER SUPPLIES\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eElectronically regulated low and high voltage supplies. \u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cwbr\u003e\u003cspan\u003eAutomatic 2 minute\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ewarm-up\/brown-out mute. \u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cwbr\u003e\u003cspan\u003eLine regulation better than .01%.\u003c\/span\u003e\u003c\/wbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOISE\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e77 dB, shorted inputs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTUBE COMPLEMENT\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e(3)-6H30P dual triodes, plus (1 each) 6550WE and 6H30P in power supply.\u003c\/span\u003e\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":45140105527452,"sku":null,"price":10200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/0595\/9324\/files\/Product-Ref-Phono-3-Angle-Black.webp?v=1753395027","url":"https:\/\/thesourceav.com\/products\/audio-research-ph9-phono-stage-open-box","provider":"The Source AV","version":"1.0","type":"link"}