{"product_id":"grado-timbre-sonata4-phono-cartridge","title":"Grado Timbre Sonata4 Phono Cartridge","description":"\u003ch1\u003eGrado Sonata4 Phono Cartridge\u003c\/h1\u003e\n\u003ch3\u003eA Timbre Series moving iron cartridge with Mediterranean Olive wood body, nude elliptical diamond, and custom aluminum cantilever\u003c\/h3\u003e\n\u003cp\u003eThe Grado Sonata4 is part of Grado’s Timbre Series, positioned as a refined wood-body cartridge designed for balance, resolution, and musical flow. 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 Sonata4 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 Sonata4 uses a nude elliptical diamond mounted to a custom 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\u003eSonata4 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 nude elliptical diamond provides effective groove contact and detail retrieval, while the custom aluminum cantilever is tuned for a balanced and responsive presentation. This pairing supports the Sonata4’s smooth top end, textured midrange, and controlled low-frequency performance.\u003c\/p\u003e\n\u003ch4\u003eWood Body Construction\u003c\/h4\u003e\n\u003cp\u003eThe Mediterranean Olive wood body gives the Sonata4 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 Custom aluminum cantilever with nude 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\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\u003eWeight:\u003c\/b\u003e 9.4 g\u003c\/p\u003e","brand":"Grado","offers":[{"title":"Low Output (1.0 mV)","offer_id":53416609743032,"sku":"SONATA4-1.0","price":600.0,"currency_code":"USD","in_stock":true},{"title":"High Output (4.0 mV)","offer_id":53416609775800,"sku":"SONATA4-4.0","price":600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/Timbre-Platinum_Sonata_2540405c-3047-4f4f-81c8-a90a1cc22b29_png.webp?v=1779813008","url":"https:\/\/upscaleaudio.com\/products\/grado-timbre-sonata4-phono-cartridge","provider":"Upscale Audio","version":"1.0","type":"link"}