{"id":4592,"date":"2026-07-21T07:51:19","date_gmt":"2026-07-21T07:51:19","guid":{"rendered":"https:\/\/www.gradothailand.com\/?post_type=product&p=4592"},"modified":"2026-07-21T09:04:52","modified_gmt":"2026-07-21T09:04:52","slug":"aeon-4","status":"publish","type":"product","link":"https:\/\/www.gradothailand.com\/en\/product\/aeon-4\/","title":{"rendered":"Aeon 4"},"content":{"rendered":"\t\t
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Performance<\/h2>\n\n

\nAeon4 is a low output moving iron cartridge designed for use with high-gain phono stages.\n<\/p>\n

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  • Its presentation is defined by clarity, control, and balance.<\/li>\n
  • Detail is presented with precision while maintaining a smooth and composed top end.<\/li>\n
  • The midrange carries natural weight and presence, and low frequencies are delivered with definition and authority.<\/li>\n
  • Complex passages are resolved cleanly, with strong separation and stable imaging.<\/li>\n
  • The overall presentation remains composed and coherent, allowing the structure and character of the recording to come through.<\/li>\n<\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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    Flux-Bridger Moving Iron Design<\/h2>\n\n

    \nAll Grado cartridges utilize a moving iron design built on Joseph Grado\u2019s patented flux-bridger principle.\n<\/p>\n

      \n
    • This approach allows the cartridge to generate a precise signal with extremely low moving mass, while keeping the coil structure fixed.<\/li>\n
    • The result is a presentation that combines speed, control, and harmonic integrity without the fragility often associated with traditional moving coil systems.<\/li>\n
    • The design also ensures long-term consistency, maintaining performance over time without degradation of the internal signal path.<\/li>\n<\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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      Diamond & Cantilever<\/h2>

      Aeon4 features a nude Shibata diamond mounted to a sapphire cantilever.<\/p>

      • The Shibata profile is highly effective at retrieving detail from the groove, offering exceptional contact and resolution while maintaining a natural, unforced presentation.<\/li>
      • Paired with a sapphire cantilever\u2014known for its rigidity and resistance to deformation\u2014the system delivers clarity, extension, and stability across the frequency range.<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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        Coil & Internal Structure<\/h2>

        The internal signal path is built using ultra-high purity 7N OCC copper, selected for its conductivity and consistency.<\/p>

        • Each cartridge undergoes cryogenic treatment during both component preparation and final assembly, helping to stabilize materials and optimize performance.<\/li>
        • The internal structure is carefully damped to reduce unwanted resonance and vibration, allowing the cartridge to extract information from the groove with minimal interference.<\/li>
        • The result is a signal that remains coherent, balanced, and dynamically responsive.<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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          Housing<\/h2>

          The Aeon4 is housed in a Brazilian Ebony wood body.<\/p>

          • Beyond its visual presence, the wood plays a role in controlling resonance and contributing to the cartridge\u2019s tonal balance.<\/li>
          • The structure has been refined to reduce mass while improving compatibility across a wider range of tonearms.<\/li>
          • The form also improves visibility of the cantilever during setup, allowing for more precise alignment.<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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            Specs<\/h2>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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              • Body – Brazilian Ebony Wood<\/li>
              • Cantilever – Sapphire\/Shibata Diamond<\/li>
              • Output – 1.0mV @ 5 CMV (45 degrees)<\/li>
              • Controlled Frequency Response – 5 Hz – 70 KHz<\/li>
              • Channel Separation – Avg. 30db, 10-30K Hz<\/li>
              • Input Load – 10-47k ohms<\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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                  • Inductance – 8mH<\/li>
                  • Resistance – 74 ohms<\/li>
                  • Cartridge Weight – 10.5 grams<\/li>
                  • Tracking Force – 1.6-1.9 grams<\/li>
                  • Compliance – 20 \u03bcm\/mN<\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

                    Grado Aeon4 \u2013 Precision and Musicality from the Lineage Series<\/strong>
                    \nAeon4 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.<\/p>\n","protected":false},"featured_media":3682,"template":"","meta":[],"product_brand":[],"product_cat":[56,60],"product_tag":[],"class_list":["post-4592","product","type-product","status-publish","has-post-thumbnail","product_cat-cartridges-en","product_cat-lineage-series-en","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/product\/4592","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":4,"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/product\/4592\/revisions"}],"predecessor-version":[{"id":4596,"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/product\/4592\/revisions\/4596"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/media\/3682"}],"wp:attachment":[{"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/media?parent=4592"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/product_brand?post=4592"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/product_cat?post=4592"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.gradothailand.com\/en\/wp-json\/wp\/v2\/product_tag?post=4592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}