{"product_id":"grado-timbre-platinum4-phono-cartridge","title":"Grado Timbre Platinum4 Phono Cartridge","description":"\u003ch1\u003eGrado Platinum4 Phono Cartridge\u003c\/h1\u003e\n\u003ch3\u003eA Timbre Series moving iron cartridge with Mediterranean Olive wood body, bonded elliptical diamond, and aluminum cantilever\u003c\/h3\u003e\n\u003cp\u003eThe Grado Platinum4 is part of Grado’s Timbre Series, positioned as an accessible wood-body cartridge designed for balance, clarity, and musicality. It uses a Mediterranean Olive wood body chosen to help control resonance, with a reshaped housing that improves cantilever visibility during setup.\u003c\/p\u003e\n\u003cp\u003eLike all Grado cartridges, the Platinum4 is built around a moving iron design based on Joseph Grado’s patented flux-bridger principle. This keeps the coil structure fixed while using low moving mass to generate the signal, giving the cartridge a combination of speed, control, and long-term consistency.\u003c\/p\u003e\n\u003cp\u003eThe Platinum4 uses a bonded elliptical diamond mounted to an aluminum cantilever, with an internal signal path made from ultra-high purity 6N OCC copper. Each cartridge also undergoes cryogenic treatment and internal damping to help reduce unwanted resonance and preserve signal integrity.\u003c\/p\u003e\n\u003ch4\u003eHigh-Output, Low-Output, and Mono Builds\u003c\/h4\u003e\n\u003cp\u003ePlatinum4 is available in high-output and low-output stereo versions, allowing compatibility with a wide range of phonostages. Mono high-output and mono low-output versions are also available as special-order builds.\u003c\/p\u003e\n\u003ch4\u003eMoving Iron Design\u003c\/h4\u003e\n\u003cp\u003eGrado’s moving iron architecture is designed to combine the low moving mass often associated with moving coil cartridges with the practical stability of a fixed-coil design. The result is a cartridge intended to deliver clarity, separation, and tonal integrity without requiring a fragile moving coil assembly.\u003c\/p\u003e\n\u003ch4\u003eDiamond and Cantilever\u003c\/h4\u003e\n\u003cp\u003eThe bonded elliptical diamond provides effective groove contact and reliable tracking, while the aluminum cantilever contributes to a stable and balanced presentation. This pairing supports the Platinum4’s clarity, control, and smooth top end across a wide range of recordings.\u003c\/p\u003e\n\u003ch4\u003eWood Body Construction\u003c\/h4\u003e\n\u003cp\u003eThe Mediterranean Olive wood body gives the Platinum4 its distinctive appearance while helping manage resonance. The revised housing shape also improves visibility during alignment, making setup easier across a wide range of tonearms.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eBody:\u003c\/b\u003e Mediterranean Olive wood\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eGenerator Type:\u003c\/b\u003e Moving iron\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCantilever and Stylus:\u003c\/b\u003e Aluminum cantilever with bonded elliptical diamond\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput (High, Low):\u003c\/b\u003e 4 mV, 1 mV\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInductance (High, Low):\u003c\/b\u003e 55 mH, 6 mH\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eResistance (High, Low):\u003c\/b\u003e 660 Ω, 70 Ω\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Load:\u003c\/b\u003e 10 kΩ–47 kΩ\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTracking Force:\u003c\/b\u003e 1.6 g–1.9 g\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCompliance:\u003c\/b\u003e 20 µm\/mN\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eChannel Separation:\u003c\/b\u003e Average 30 dB, 10 Hz–30 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eControlled Frequency Response:\u003c\/b\u003e 10 Hz–60 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCapacitive Load:\u003c\/b\u003e Non-sensitive to capacitive load\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBuilds:\u003c\/b\u003e High Output, Low Output, Mono\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWeight:\u003c\/b\u003e 9.4 g\u003c\/p\u003e","brand":"Grado","offers":[{"title":"Low Output (1.0 mV)","offer_id":53416609546424,"sku":"PLATINUM4-1.0","price":400.0,"currency_code":"USD","in_stock":true},{"title":"High Output (4.0 mV)","offer_id":53416609579192,"sku":"PLATINUM4-4.0","price":400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/Timbre-Platinum_Sonata_png_79075f7f-f4ac-4a5f-abed-ecd246818534.webp?v=1779813117","url":"https:\/\/upscaleaudio.com\/products\/grado-timbre-platinum4-phono-cartridge","provider":"Upscale Audio","version":"1.0","type":"link"}