{"product_id":"audio-research-ph9-phonostage","title":"Audio Research PH9 Phonostage","description":"\u003ch1\u003eAudio Research PH9 Phono Stage\u003c\/h1\u003e\n\u003ch3\u003eAll-Tube Phono Preamplification With Five Selectable Cartridge Loads and Remote-Controlled Setup\u003c\/h3\u003e\n\u003cp\u003eThe Audio Research PH9 brings the company’s long-running vacuum-tube approach to vinyl playback into a flexible, single-chassis phonostage designed to work with a broad range of cartridge and turntable combinations. Three 6H30 vacuum tubes form the core of its audio circuit, with additional tube regulation in the power supply.\u003c\/p\u003e\n\u003cp\u003eWith 58 dB of gain and five selectable impedance settings, the PH9 provides useful flexibility when matching a cartridge to the phonostage. Loading can be changed among 47k, 1,000, 500, 200, and 100 ohms, allowing you to experiment with cartridge loading without opening the chassis or changing components.\u003c\/p\u003e\n\u003ch4\u003eCartridge Setup From the Listening Chair\u003c\/h4\u003e\n\u003cp\u003eThe PH9’s loading settings can be changed on the fly using the included metal remote control. Its menu system also provides access to cartridge impedance, tube hours, auto shutdown, and other operating functions. A tube-hour meter makes it easy to keep track of operating time, while the display can be turned off when desired.\u003c\/p\u003e\n\u003ch4\u003e6H30 Vacuum-Tube Signal Path\u003c\/h4\u003e\n\u003cp\u003eThree high-current 6H30P dual triodes handle the audio signal, while a 6550WE and an additional 6H30P are used in the power supply. Electronically regulated low- and high-voltage supplies are complemented by an automatic two-minute warm-up and brown-out mute circuit.\u003c\/p\u003e\n\u003cp\u003eThe PH9 uses single-ended connectivity and provides a fixed 58 dB of gain. Its combination of adjustable loading, remote operation, and straightforward tube architecture makes it a particularly versatile Audio Research option for a vinyl-focused system.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThree 6H30P dual triodes in the audio circuit\u003c\/li\u003e\n\u003cli\u003e58 dB fixed gain at 1 kHz\u003c\/li\u003e\n\u003cli\u003eFive selectable cartridge loads: 47k, 1,000, 500, 200, and 100 ohms\u003c\/li\u003e\n\u003cli\u003eCartridge loading adjustable on the fly\u003c\/li\u003e\n\u003cli\u003eRemote-controlled operation and menu functions\u003c\/li\u003e\n\u003cli\u003eTube-hour meter\u003c\/li\u003e\n\u003cli\u003eAuto-shutdown function\u003c\/li\u003e\n\u003cli\u003eSwitchable display\u003c\/li\u003e\n\u003cli\u003eElectronically regulated low- and high-voltage power supplies\u003c\/li\u003e\n\u003cli\u003e6550WE and 6H30P vacuum tubes used in the power supply\u003c\/li\u003e\n\u003cli\u003eAutomatic two-minute warm-up and brown-out mute\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIncluded Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMetal remote control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eFrequency Response:\u003c\/b\u003e ±0.2 dB of RIAA, 5 Hz–20 kHz; 1 dB points below 0.3 Hz and above 80 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDistortion (3 V RMS, 1 kHz Output):\u003c\/b\u003e Less than 0.015%\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eGain (1 kHz):\u003c\/b\u003e 58 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Impedance:\u003c\/b\u003e Selectable loads: 47k, 1,000, 500, 200, and 100 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Impedance:\u003c\/b\u003e 200 ohms; recommended load 50k–100k ohms and 100 pF; 10k ohms minimum and 2,000 pF maximum\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Polarity:\u003c\/b\u003e Non-inverting\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMaximum Input (1 kHz):\u003c\/b\u003e 80 mV RMS\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRated Output:\u003c\/b\u003e 0.5 V RMS, 10 Hz–60 kHz, into 100k-ohm load; maximum balanced output capability is 0.46 V RMS at less than 0.5% THD at 1 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eControls:\u003c\/b\u003e 6 push buttons: Power, Menu, Option, Enter, Input, Mute\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Supplies:\u003c\/b\u003e Electronically regulated low- and high-voltage supplies; automatic two-minute warm-up\/brown-out mute; line regulation better than 0.01%\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNoise:\u003c\/b\u003e 77 dB, shorted inputs\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTube Complement:\u003c\/b\u003e 3 x 6H30P dual triodes; 1 x 6550WE and 1 x 6H30P in power supply\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Requirements (US):\u003c\/b\u003e 100–125 VAC, 60 Hz; 120 W maximum; 2 W standby\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDimensions (H × W × D):\u003c\/b\u003e 6.5\" x 19\" x 13.7\" (13.7 x 48 x 34.8 cm); handles extend 1.6\" (4 cm) forward of the front panel\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eShipping Weight:\u003c\/b\u003e 23.5 lb. (10.7 kg)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWeight:\u003c\/b\u003e 15.4 lb. (7 kg)\u003c\/p\u003e\n","brand":"Audio Research","offers":[{"title":"Black","offer_id":53876968161464,"sku":"ARC-PH9-BLK","price":12000.0,"currency_code":"USD","in_stock":true},{"title":"Natural (Silver)","offer_id":53876968194232,"sku":"ARC-PH9-NAT","price":12000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/PH9frontnathires.jpg?v=1787612216","url":"https:\/\/upscaleaudio.com\/products\/audio-research-ph9-phonostage","provider":"Upscale Audio","version":"1.0","type":"link"}