{"product_id":"nagaoka-mp-700-phono-cartridge","title":"Nagaoka MP-700 Phono Cartridge","description":"\u003ch1\u003eNagaoka MP-700 Phono Cartridge\u003c\/h1\u003e \u003ch3\u003eMicro-Ridge diamond, boron cantilever, and advanced Moving Permalloy generator\u003c\/h3\u003e \u003cp\u003eThe Nagaoka MP-700 is the flagship of the company's Moving Permalloy cartridge series, combining a nude Micro-Ridge diamond and boron cantilever with substantial changes to the MP generator itself. A new magnetic-flux guide plate, tension-wire suspension, and rigid duralumin frame are designed to extract finer groove information while retaining the practical high output of an MM-compatible cartridge.\u003c\/p\u003e \u003cp\u003eIts 4 mV output allows the MP-700 to work directly into a conventional 47 kΩ MM phonostage despite the low-mass stylus and cantilever assembly.\u003c\/p\u003e\n\n\u003ch4\u003eRevised Moving Permalloy Generator\u003c\/h4\u003e \u003cp\u003eNagaoka's Moving Permalloy system replaces the relatively heavy magnet attached to the cantilever of a conventional MM cartridge with a lightweight permalloy element. For the MP-700, Nagaoka further develops the system by adding a magnetic-flux guide plate inside the cartridge.\u003c\/p\u003e \u003cp\u003eThe plate improves the flow of magnetic flux through the generator and increases flux density around the permalloy element, increasing sensitivity to very small groove movements.\u003c\/p\u003e\n\n\u003ch4\u003eTension-Wire Suspension\u003c\/h4\u003e \u003cp\u003eThe MP-700 is the first MP-series cartridge to incorporate a tension wire into its suspension. The wire helps control the cantilever's position as tracking force varies over record warps and other groove irregularities.\u003c\/p\u003e \u003cp\u003eThe additional control is intended to keep the stylus operating consistently around its designed pivot point and stabilize tracking across the record surface.\u003c\/p\u003e\n\n\u003ch4\u003eNude Micro-Ridge Diamond and Boron Cantilever\u003c\/h4\u003e \u003cp\u003eA nude Micro-Ridge diamond provides a narrow tracing surface for following fine, short-wavelength groove modulation. Its elongated groove contact also spreads the tracking force over a larger area of the groove wall than simpler stylus profiles.\u003c\/p\u003e \u003cp\u003eThe stylus is mounted to a boron cantilever, combining low mass with very high stiffness. Nagaoka specifies frequency response to 27 kHz and 30 dB of channel separation at 1 kHz.\u003c\/p\u003e\n\n\u003ch4\u003eDuralumin Frame\u003c\/h4\u003e \u003cp\u003eThe cartridge frame is made from high-strength duralumin and receives multiple surface treatments. Nagaoka applies nickel plating, black tin plating, and an insulating coating to improve durability while helping prevent static electricity from entering the cartridge structure.\u003c\/p\u003e\n\n\u003ch4\u003eReplaceable Stylus\u003c\/h4\u003e \u003cp\u003eThe matching replacement stylus is the Nagaoka JN-P700, retaining the nude Micro-Ridge diamond and boron cantilever.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eMP-700 cartridge\u003c\/li\u003e \u003cli\u003eStylus guard\u003c\/li\u003e \u003cli\u003eCartridge case\u003c\/li\u003e \u003cli\u003eMounting screws, washers, and nuts\u003c\/li\u003e \u003cli\u003eHex wrench\u003c\/li\u003e \u003cli\u003eScrewdriver\u003c\/li\u003e \u003cli\u003eSerial card\u003c\/li\u003e \u003cli\u003eInstruction manual\u003c\/li\u003e \u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e \u003cp\u003e\u003cb\u003eType:\u003c\/b\u003e Moving Permalloy stereo cartridge\u003c\/p\u003e \u003cp\u003e\u003cb\u003eMounting:\u003c\/b\u003e 1\/2 in.\u003c\/p\u003e \u003cp\u003e\u003cb\u003eStylus:\u003c\/b\u003e Nude Micro-Ridge diamond\u003c\/p\u003e \u003cp\u003e\u003cb\u003eCantilever:\u003c\/b\u003e Boron\u003c\/p\u003e \u003cp\u003e\u003cb\u003eOutput Voltage (At 1 kHz, 5 cm\/sec):\u003c\/b\u003e 4 mV\u003c\/p\u003e \u003cp\u003e\u003cb\u003eFrequency Response:\u003c\/b\u003e 20 Hz–27 kHz\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChannel Separation (At 1 kHz):\u003c\/b\u003e 30 dB\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChannel Balance (At 1 kHz):\u003c\/b\u003e ≤1 dB\u003c\/p\u003e \u003cp\u003e\u003cb\u003eVertical Tracking Force:\u003c\/b\u003e 1.4 g\u003c\/p\u003e \u003cp\u003e\u003cb\u003eLoad Resistance:\u003c\/b\u003e 47 kΩ\u003c\/p\u003e \u003cp\u003e\u003cb\u003eLoad Capacitance:\u003c\/b\u003e 100 pF\u003c\/p\u003e \u003cp\u003e\u003cb\u003eFrame:\u003c\/b\u003e Duralumin\u003c\/p\u003e \u003cp\u003e\u003cb\u003eReplacement Stylus:\u003c\/b\u003e JN-P700\u003c\/p\u003e \u003cp\u003e\u003cb\u003eWeight:\u003c\/b\u003e 8 g\u003c\/p\u003e","brand":"Nagaoka","offers":[{"title":"Default Title","offer_id":54067273171128,"sku":"MP-700","price":1399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/MP-700.png?v=1789663895","url":"https:\/\/upscaleaudio.com\/products\/nagaoka-mp-700-phono-cartridge","provider":"Upscale Audio","version":"1.0","type":"link"}