{"product_id":"grado-signature-s550-open-back-headphones","title":"Grado Signature S550 Open-Back Headphones","description":"\u003cp\u003eThe most approachable entry into Grado’s Signature Line, the S550 pairs a 50mm S2 dynamic driver with a hand-crafted Brazilian Walnut housing and detachable Signature Silver cable via 4-pin mini XLR — delivering clarity, balance, and musical engagement for extended listening.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransducer Type:\u003c\/strong\u003e Dynamic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Principle:\u003c\/strong\u003e Open Air\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 6 Hz – 44 kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion (THD):\u003c\/strong\u003e \u0026lt; 0.2% at 100 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSound Pressure Level (SPL):\u003c\/strong\u003e 112 dB (1 mW)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Impedance:\u003c\/strong\u003e 38 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriver Diameter:\u003c\/strong\u003e 50 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriver Matching Tolerance:\u003c\/strong\u003e 0.05 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 335 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable:\u003c\/strong\u003e Signature Silver detachable cable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Connector:\u003c\/strong\u003e 4-pin balanced mini XLR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource Connector:\u003c\/strong\u003e 3.5 mm with 6.3 mm adapter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEar Cushions:\u003c\/strong\u003e B Cushions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003ca href=\"https:\/\/gradocanada.ca\/product\/signature-s550\"\u003eGrado Canada product details\u003c\/a\u003e\u003c\/p\u003e","brand":"Grado","offers":[{"title":"Default Title","offer_id":67952292462806,"sku":"S550","price":1499.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/2457\/9030\/files\/grado-2842-1.jpg?v=1794360570","url":"https:\/\/unifyav.ca\/products\/grado-signature-s550-open-back-headphones","provider":"Unify AV","version":"1.0","type":"link"}