{"product_id":"grado-the-reference-4-phono-cartridge","title":"Grado The Reference 4 Phono Cartridge","description":"\u003cp\u003eThe \u003cstrong\u003eGrado\u003c\/strong\u003e The Reference 4 \u003cstrong\u003ephono cartridge\u003c\/strong\u003e interfaces with standard half-inch tonearms via precision four-pin terminals, offering demanding vinyl collectors an exceptionally accurate transducer for high-fidelity playback. Positioned at the apex of the wooden-body Timbre Series, this cartridge employs hand-wound oxygen-free continuous-cast copper coils paired with a low-mass moving iron generator to extract intricate harmonic information. Configured in both High Output and Low Output variations, the unit delivers consistent electrical linearity across both moving-magnet inputs and high-gain phono preamplifiers.\u003c\/p\u003e\u003ch3\u003eThe Hi-Fi Centre Team Take\u003c\/h3\u003e\u003cp\u003eLiving with this cartridge transforms extended album sessions into deeply engaging, fatigue-free listening experiences where instrumental textures and natural acoustic decay emerge effortlessly. The cured American Osage wood housing imparts organic tonal warmth and vibration damping, anchoring delicate micro-dynamics without masking subtle room ambience on quiet pressings. Whether savouring intimate acoustic arrangements late at night or navigating complex orchestral crescendos, the cartridge maintains spatial stability and composure. It serves as an enduring centrepiece for listeners who prioritise natural timbre and structural musical balance over harsh analytical glare.\u003c\/p\u003e\u003ch3\u003eKey Acoustic \u0026amp; Design Features\u003c\/h3\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmerican Osage Housing:\u003c\/strong\u003e Controls unwanted mechanical resonances through specially cured hardwood to preserve harmonic clarity and tonal warmth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachined Boron Cantilever:\u003c\/strong\u003e Features a low-mass assembly mounted with a nude Shibata diamond for accurate groove tracking and extended high-frequency resolution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlux-Bridger Generator:\u003c\/strong\u003e Combines moving-coil transient speed with moving-iron tracking stability using four individual coils of continuous-cast copper.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthorized Dealer Assurance:\u003c\/strong\u003e Hi-Fi Centre is an Authorized Dealer, ensuring genuine manufacturer warranty protection, verified product authenticity, and dedicated technical aftercare.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Grado\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e The Reference 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Timbre Series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransducer Type:\u003c\/strong\u003e Moving Iron (Flux-Bridger)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e American Osage wood\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCantilever:\u003c\/strong\u003e Machined boron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStylus Profile:\u003c\/strong\u003e Nude Shibata diamond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Configuration:\u003c\/strong\u003e High Output (4.0 mV at 5 CMV), Low Output (1.0 mV at 5 CMV)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 10 Hz – 60,000 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel Separation:\u003c\/strong\u003e 30 dB average (10 Hz – 30,000 Hz)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTracking Force Range:\u003c\/strong\u003e 1.6 g – 1.9 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliance:\u003c\/strong\u003e 20 µm\/mN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Inductance:\u003c\/strong\u003e High Output: 55 mH; Low Output: 6 mH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Resistance:\u003c\/strong\u003e High Output: 660 ohms; Low Output: 70 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Load:\u003c\/strong\u003e 10,000 – 47,000 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCartridge Weight:\u003c\/strong\u003e 9.6 g\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Grado","offers":[{"title":"High Output","offer_id":46005956509749,"sku":"Reference 4-HO","price":2150.0,"currency_code":"CAD","in_stock":true},{"title":"Low Output","offer_id":46005956542517,"sku":"Reference 4-LO","price":2150.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2246\/9355\/files\/GradoMaster4_61d11e61-8e0d-4021-a0d2-856cf2f4de56.jpg?v=1789584111","url":"https:\/\/hificentre.com\/products\/grado-the-reference-4-phono-cartridge","provider":"Hi-Fi Centre","version":"1.0","type":"link"}