{"product_id":"grado-opus4-cartridge","title":"Grado Opus4 Cartridge","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eThis product is available to pre-order with an ETA of early May.\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOpus4 is the entry point into the Grado Timbre Series, introducing the tonal character and construction of Grado’s wood body cartridges. Built on decades of cartridge design experience, it delivers a balanced and musical presentation while maintaining the core performance principles that define Grado cartridges.\u003c\/p\u003e\n\u003cp\u003eUtilizing Grado’s moving iron design, Opus4 provides a stable and consistent signal with low moving mass and long-term reliability.\u003c\/p\u003e\n\u003cp\u003eOffered in both stereo and mono configurations, Opus4 represents the foundation of the Grado wood cartridge line.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance\u003c\/strong\u003e\u003cbr\u003eOpus4 is available in both high and low output configurations, allowing for compatibility across a wide range of phono stages.\u003c\/p\u003e\n\u003cp\u003eIts presentation is balanced and controlled, with clear detail and a smooth, natural top end. The midrange carries presence and warmth, while low frequencies remain defined and composed.\u003c\/p\u003e\n\u003cp\u003eRecordings are presented with stability and coherence, maintaining separation and musical flow while allowing the character of the recording to come through naturally.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMoving Iron Design\u003c\/strong\u003e\u003cbr\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\u003e\u003cstrong\u003eDiamond \u0026amp; Cantilever\u003c\/strong\u003e\u003cbr\u003eOpus4 features a bonded elliptical diamond mounted to an aluminum cantilever.\u003c\/p\u003e\n\u003cp\u003eThe elliptical profile provides effective groove contact and reliable tracking, while the aluminum cantilever contributes to a stable and controlled presentation. This combination delivers clarity and balance across a wide range of recordings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCoil \u0026amp; Internal Structure\u003c\/strong\u003e\u003cbr\u003eThe internal signal path is built using ultra-high purity 5N OCC copper, selected for its conductivity and consistency.\u003c\/p\u003e\n\u003cp\u003eEach cartridge undergoes cryogenic treatment and internal damping to reduce unwanted resonance and preserve signal integrity.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Grado","offers":[{"title":"High Output","offer_id":53545823699312,"sku":"GRADO.OPUS4.HO","price":569.0,"currency_code":"NZD","in_stock":true},{"title":"Low Output","offer_id":53545823732080,"sku":"GRADO.OPUS4.LO","price":569.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/9593\/8453\/files\/grado-opus4-cartridge-lifestyle-4.jpg?v=1775739171","url":"https:\/\/addictedtoaudio.co.nz\/products\/grado-opus4-cartridge","provider":"Addicted To Audio NZ","version":"1.0","type":"link"}