{"product_id":"unison-research-phono-one","title":"Unison Research PhonoOne","description":"\u003cstrong\u003eThe Unison Research PhonoOne delivers a pure and unaltered sound that reflects the true essence of music. Its carefully engineered circuit design ensures a listening experience embedded in acoustic authenticity.\u003c\/strong\u003e\u003cbr\u003e\u003chr\u003e\u003cbr\u003eThe Unison Research PhonoOne employs a pure Class A design focusing on low distortion and high fidelity. With a gain of approximately 54dB, it is capable of handling both MM and most MC cartridges by utilizing five ECC83\/12AX7 double triodes arranged in a parallel configuration to minimize noise and maximize output quality. The passive RIAA equalization circuit is finely tuned with selected components for stringent tolerances, ensuring accurate reproduction across a wide frequency range. Additionally, the preamplifier incorporates a specialized delayed muting function to prevent audible transients during warm-up and shutdown, while independent RC filters near each gain stage significantly reduce crosstalk—even at low frequencies. This meticulous attention to layout and design principles guarantees a truly natural sound with exceptional channel separation and interference rejection.\u003cbr\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e**Parallel Triode Configuration**: Enhances gain and reduces noise levels, resulting in a cleaner output.\u003c\/li\u003e\n\u003cli\u003e**Passive RIAA Equalization**: Ensures a precision equalization curve with tightly controlled tolerances for accurate frequency response.\u003c\/li\u003e\n\u003cli\u003e**Delayed Muting Function**: Prevents loud pops by muting the output until operating conditions are optimal, protecting both the user’s equipment and ears.\u003c\/li\u003e\n\u003cli\u003e**Customizable Input Matching**: Both resistance and capacitance can be tailored to match various cartridges for optimal performance.\u003c\/li\u003e\n\u003cli\u003e**Independent RC Filter Cells**: Minimize crosstalk at low frequencies by over 20dB compared to previous designs, allowing for a clearer audio signal.\u003c\/li\u003e\n\u003cli\u003e**Hand Soldered Wiring**: Uses shielded wire for signal integrity, further improving overall sound quality and reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eType: Stereo Phono Valve Preamplifier\u003c\/li\u003e\n\u003cli\u003eClass: Pure A\u003c\/li\u003e\n\u003cli\u003eRIAA: Passive +\/- 0.1 dB (20 Hz \/ 20 KHz)\u003c\/li\u003e\n\u003cli\u003eOutput Impedance: 800 ohm\u003c\/li\u003e\n\u003cli\u003eOutputs: 1 x Line\u003c\/li\u003e\n\u003cli\u003eGain: 54 dB\u003c\/li\u003e\n\u003cli\u003eTotal Harmonic Distortion (THD): 0.1% at 1 volt output\u003c\/li\u003e\n\u003cli\u003eSignal to Noise Ratio (S\/N): -80 dB\u003c\/li\u003e\n\u003cli\u003eInputs: 1 per MM or MC Cartridge\u003c\/li\u003e\n\u003cli\u003eInput Impedance: 47 Kohm – 100 – 50 – 22 ohm \/ 100 – 200 – 320 – 420 pF (modifiable)\u003c\/li\u003e\n\u003cli\u003eFeedback Factor: 0 dB\u003c\/li\u003e\n\u003cli\u003eValves: 5 x ECC83 \/ 12AX7\u003c\/li\u003e\n\u003cli\u003ePower Supply: External\u003c\/li\u003e\n\u003cli\u003eDimensions: 37.3 x 5.84 x 24.63 cm\u003c\/li\u003e\n\u003cli\u003eNet Weight: 3.6 Kg (including power supply)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Unison Research","offers":[{"title":"Default Title","offer_id":43088231235697,"sku":"URPHONOONE","price":3499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/0571\/7617\/files\/phonoone_f231bc34-d135-4fc9-a541-d10c6ba99659.jpg?v=1774188143","url":"https:\/\/shopodsy.com\/products\/unison-research-phono-one","provider":"ODSY","version":"1.0","type":"link"}