{"product_id":"trilogy-975-phono-stage","title":"Trilogy 975 Phono Stage","description":"\u003cp\u003eThe 975 is Trilogy's reference phono stage, a two box design with an external power supply. The main unit is housed in a machined billet weighing more than 5 kg, providing physical as well as electrical isolation for each circuit element. Each channel has an independently housed and isolated gain stage.\u003c\/p\u003e\u003cp\u003eThe topology is fully discrete and single ended, reaching high bandwidth and low distortion through active current sources and cascode gain blocks. Precision matched input transistor pairs keep noise very low. The common series regulator, usually chosen for simplicity, has been rejected in favour of discrete shunt regulators biased heavily into Class A for headroom; a shunt regulator can sink as well as source current, an advantage under the dynamic conditions music creates.\u003c\/p\u003e\u003cp\u003eDC for the regulators comes from the remote power supply, whose enclosure can be positioned to keep magnetic fields away from the active circuitry. Its custom mains transformer is a low current density design with a copper Faraday screen, feeding reservoir capacitors through a bespoke inductor to form a true choke input supply. Gain for moving magnet or moving coil and cartridge loading are set by configuration switches underneath.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e two box MM\/MC phono stage with external power supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTopology:\u003c\/strong\u003e fully discrete single ended; active current sources and cascode gain blocks; precision matched input transistor pairs; discrete shunt regulators biased into Class A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply:\u003c\/strong\u003e external; low current density mains transformer with copper Faraday screen; bespoke inductor forming a true choke input supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e user adjustable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput impedance:\u003c\/strong\u003e 47 kohms, user adjustable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput capacitance:\u003c\/strong\u003e user adjustable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustment:\u003c\/strong\u003e configuration switches underneath\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs \/ outputs:\u003c\/strong\u003e 1 pair RCA in; 1 pair RCA out; output impedance 150 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency response (to RIAA curve):\u003c\/strong\u003e 20 Hz – 20 kHz +\/- 0.25 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e phase correct (non inverting)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower consumption:\u003c\/strong\u003e 15 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions \/ weight:\u003c\/strong\u003e main unit 270 x 312 x 56 mm \/ 6.8 kg; PSU 270 x 312 x 74 mm \/ 5.7 kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Trilogy","offers":[{"title":"Default Title","offer_id":49211056816347,"sku":null,"price":15500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1363\/6553\/files\/trilogy-975-hero.png?v=1788279830","url":"https:\/\/almaaudio.com\/products\/trilogy-975-phono-stage","provider":"Alma Music and Audio","version":"1.0","type":"link"}