{"product_id":"grado-master-4-phono-cartridge","title":"Grado Master 4 Phono Cartridge","description":"\u003cp\u003eThe Grado Master 4 Phono Cartridge utilises Grado's patented flux-bridger moving iron generator housed within an American Osage wood body to deliver low effective tip mass and resonance-controlled tracking for discerning vinyl playback systems. Representing a significant technical benchmark among wooden phono cartridges, this transducer pairs a machined boron cantilever with a nude elliptical diamond stylus to trace complex vinyl grooves with clinical precision. Offered in both High Output and Low Output variants, it integrates seamlessly with conventional moving-magnet inputs as well as dedicated high-gain phono stages.\u003c\/p\u003e\u003ch3\u003eThe Hi-Fi Centre Team Take\u003c\/h3\u003e\u003cp\u003eLiving with the Grado Master 4 transforms everyday record spinning into an organic, fatigue-free musical session that encourages listening straight through entire album sides. The cured American Osage wood body imparts a grounded tonal weight to acoustic instruments and vocals without obscuring subtle micro-dynamics or ambient venue decay. Its moving iron mechanism navigates dense, highly modulated passages with calm composure, creating an expansive and stable soundstage suited for long evenings of deep musical immersion. It delivers the agility and low distortion expected of modern reference transducers while preserving the tactile warmth that makes vinyl playback permanently engaging.\u003c\/p\u003e\u003ch3\u003eKey Acoustic \u0026amp; Design Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachined Boron Cantilever:\u003c\/strong\u003e Employs a low-mass boron rod and five-piece OTL assembly to trace dynamic groove modulations with agility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmerican Osage Housing:\u003c\/strong\u003e Utilises dense domestic hardwood to naturally dampen internal mechanical resonances for an uncoloured acoustic output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlux-Bridger Generator:\u003c\/strong\u003e Operates fixed ultra-high purity copper coils with minimal moving mass to ensure clean channel separation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthorized Dealer Guarantee:\u003c\/strong\u003e Backed by Hi-Fi Centre as an Authorized Dealer, ensuring full factory warranty coverage and dedicated after-sales support.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBrand: Grado Labs\u003c\/li\u003e\n\u003cli\u003eSeries: Timbre Series\u003c\/li\u003e\n\u003cli\u003eModel: Master 4\u003c\/li\u003e\n\u003cli\u003eTransducer Type: Moving Iron (MI) \/ Flux-Bridger\u003c\/li\u003e\n\u003cli\u003eBody Material: Cured American Osage Wood\u003c\/li\u003e\n\u003cli\u003eCantilever: Machined Boron (5-piece OTL)\u003c\/li\u003e\n\u003cli\u003eStylus: Nude Elliptical Diamond\u003c\/li\u003e\n\u003cli\u003eOutput Options: High Output (4.0 mV @ 5 CMV) \/ Low Output (1.0 mV @ 5 CMV)\u003c\/li\u003e\n\u003cli\u003eFrequency Response: 10 Hz – 60,000 Hz\u003c\/li\u003e\n\u003cli\u003eChannel Separation: Average 30 dB (10 Hz – 30,000 Hz)\u003c\/li\u003e\n\u003cli\u003eInductance: High Output: 55 mH; Low Output: 6 mH\u003c\/li\u003e\n\u003cli\u003eResistance: High Output: 660 Ω; Low Output: 70 Ω\u003c\/li\u003e\n\u003cli\u003eRecommended Input Load: 10,000 Ω – 47,000 Ω\u003c\/li\u003e\n\u003cli\u003eCartridge Weight: 9.6 g\u003c\/li\u003e\n\u003cli\u003eTracking Force Range: 1.6 g – 1.9 g\u003c\/li\u003e\n\u003cli\u003eCompliance: 20 μm\/mN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Grado","offers":[{"title":"High Output","offer_id":46005957165109,"sku":"Master 4-HO","price":1450.0,"currency_code":"CAD","in_stock":true},{"title":"Low Output","offer_id":46005957197877,"sku":"Master 4-LO","price":1450.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2246\/9355\/files\/GradoMaster4.jpg?v=1789584048","url":"https:\/\/hificentre.com\/products\/grado-master-4-phono-cartridge","provider":"Hi-Fi Centre","version":"1.0","type":"link"}