{"product_id":"grado-aeon4-mi-phono-cartridge","title":"Grado Aeon4 MI Phono Cartridge","description":"\u003cp\u003eAeon4 sits within the Grado Lineage Series as a direct expression of the design principles that define the line. Developed through decades of cartridge refinement, it delivers a highly resolved and controlled presentation while maintaining the musical balance that defines Grado cartridges.\u003c\/p\u003e\n\u003cp\u003eBuilt around Grado’s patented moving iron flux-bridger system, Aeon4 brings together speed, stability, and tonal density in a design intended for systems that demand both precision and musicality.\u003c\/p\u003e\n\u003cp\u003eOffered in both stereo and mono configurations, Aeon4 continues the evolution of Grado’s wood body cartridges.\u003c\/p\u003e\n\u003cp\u003ePerformance\u003c\/p\u003e\n\u003cp\u003eAeon4 is a low output moving iron cartridge designed for use with high-gain phono stages.\u003c\/p\u003e\n\u003cp\u003eIts presentation is defined by clarity, control, and balance. Detail is presented with precision while maintaining a smooth and composed top end. The midrange carries natural weight and presence, and low frequencies are delivered with definition and authority.\u003c\/p\u003e\n\u003cp\u003eComplex passages are resolved cleanly, with strong separation and stable imaging. The overall presentation remains composed and coherent, allowing the structure and character of the recording to come through.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eFlux-Bridger Moving Iron Design\u003c\/p\u003e\n\u003cp\u003eAll Grado cartridges utilize a moving iron design built on Joseph Grado’s patented flux-bridger principle.\u003c\/p\u003e\n\u003cp\u003eThis approach allows the cartridge to generate a precise signal with extremely low moving mass, while keeping the coil structure fixed. The result is a presentation that combines speed, control, and harmonic integrity without the fragility often associated with traditional moving coil systems.\u003c\/p\u003e\n\u003cp\u003eThe design also ensures long-term consistency, maintaining performance over time without degradation of the internal signal path.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eDiamond \u0026amp; Cantilever\u003c\/p\u003e\n\u003cp\u003eAeon4 features a nude Shibata diamond mounted to a sapphire cantilever.\u003c\/p\u003e\n\u003cp\u003eThe Shibata profile is highly effective at retrieving detail from the groove, offering exceptional contact and resolution while maintaining a natural, unforced presentation. Paired with a sapphire cantilever—known for its rigidity and resistance to deformation—the system delivers clarity, extension, and stability across the frequency range.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eCoil \u0026amp; Internal Structure\u003c\/p\u003e\n\u003cp\u003eThe internal signal path is built using ultra-high purity 7N OCC copper, selected for its conductivity and consistency.\u003c\/p\u003e\n\u003cp\u003eEach cartridge undergoes cryogenic treatment during both component preparation and final assembly, helping to stabilize materials and optimize performance.\u003c\/p\u003e\n\u003cp\u003eThe internal structure is carefully damped to reduce unwanted resonance and vibration, allowing the cartridge to extract information from the groove with minimal interference. The result is a signal that remains coherent, balanced, and dynamically responsive.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eHousing\u003c\/p\u003e\n\u003cp\u003eThe Aeon4 is housed in a Brazilian Ebony wood body.\u003c\/p\u003e\n\u003cp\u003eBeyond its visual presence, the wood plays a role in controlling resonance and contributing to the cartridge’s tonal balance. The structure has been refined to reduce mass while improving compatibility across a wider range of tonearms.\u003c\/p\u003e\n\u003cp\u003eThe form also improves visibility of the cantilever during setup, allowing for more precise alignment.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eSpecs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBody - Brazilian Ebony Wood\u003c\/li\u003e\n\u003cli\u003eCantilever - Sapphire\/Shibata Diamond\u003c\/li\u003e\n\u003cli\u003eOutput - 1.0mV @ 5 CMV (45 degrees)\u003c\/li\u003e\n\u003cli\u003eControlled Frequency Response - 5 Hz - 70 KHz\u003c\/li\u003e\n\u003cli\u003eChannel Separation - Avg. 35db, 10-30K Hz\u003c\/li\u003e\n\u003cli\u003eInput Load - 10-47k ohms\u003c\/li\u003e\n\u003cli\u003eInductance - 8mH\u003c\/li\u003e\n\u003cli\u003eResistance - 74 ohms\u003c\/li\u003e\n\u003cli\u003eCartridge Weight - 10.5 grams\u003c\/li\u003e\n\u003cli\u003eTracking Force - 1.6-1.9 grams\u003c\/li\u003e\n\u003cli\u003eCompliance - 20 μm\/mN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Grado Labs","offers":[{"title":"Stereo","offer_id":47381663776908,"sku":null,"price":4995.0,"currency_code":"USD","in_stock":true},{"title":"Mono","offer_id":47381663809676,"sku":null,"price":4995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/3308\/9164\/files\/gradoLineagecartridge_d661a036-e54e-4a11-94f0-013a2c4fad0a.png?v=1775747086","url":"https:\/\/www.ttvjaudio.com\/products\/grado-aeon4-mi-phono-cartridge","provider":"TTVJ Audio","version":"1.0","type":"link"}