{"product_id":"sennheiser-hd-660-s2-openback-wired-over-earheadphones","title":"Sennheiser HD 660 S2 OpenBack Wired Over-EarHeadphones","description":"\u003ch3 data-start=\"0\" data-end=\"90\"\u003e\n\u003cstrong data-start=\"3\" data-end=\"44\"\u003e\u003cspan class=\"entity-underline hover:entity-accent inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eSennheiser HD 660S2 Open‑Back Wired Over‑Ear Headphones\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e — Audiophile-Grade Open-Back Wired Headphones\u003c\/h3\u003e\n\u003cp data-start=\"92\" data-end=\"557\"\u003eThe \u003cstrong data-start=\"96\" data-end=\"155\"\u003eSennheiser HD 660S2 Open-Back Wired Over-Ear Headphones\u003c\/strong\u003e are premium \u003cstrong data-start=\"168\" data-end=\"207\"\u003ehigh-fidelity audiophile headphones\u003c\/strong\u003e designed for deep listening and studio-grade sound reproduction. As part of Sennheiser’s legendary HD 600 series lineage, the HD 660S2 brings refined \u003cstrong data-start=\"358\" data-end=\"424\"\u003enatural sound, wide soundstage and precision audio performance\u003c\/strong\u003e to demanding listeners who want an immersive, detailed audio experience from wired headphones. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 data-start=\"564\" data-end=\"607\"\u003e\u003cstrong data-start=\"571\" data-end=\"607\"\u003eAudiophile-Tuned Open-Back Sound\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul data-start=\"609\" data-end=\"1364\"\u003e\n\u003cli data-start=\"609\" data-end=\"841\"\u003e\n\u003cp data-start=\"611\" data-end=\"841\"\u003e\u003cstrong data-start=\"611\" data-end=\"640\"\u003eOpen-back over-ear design\u003c\/strong\u003e delivers a spacious, natural soundstage with enhanced ambient detail and instrument separation — ideal for critical listening, home audio and studio monitoring. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"842\" data-end=\"1021\"\u003e\n\u003cp data-start=\"844\" data-end=\"1021\"\u003e\u003cstrong data-start=\"844\" data-end=\"886\"\u003e38 mm high-performance dynamic drivers\u003c\/strong\u003e engineered for neutral, precise sound with \u003cstrong data-start=\"930\" data-end=\"980\"\u003eextended sub-bass, clear mids and smooth highs\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1022\" data-end=\"1205\"\u003e\n\u003cp data-start=\"1024\" data-end=\"1205\"\u003e\u003cstrong data-start=\"1024\" data-end=\"1070\"\u003eOptimized airflow and vented magnet system\u003c\/strong\u003e reduce distortion and produce balanced audio that stays true across genres and dynamic ranges. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1206\" data-end=\"1364\"\u003e\n\u003cp data-start=\"1208\" data-end=\"1364\"\u003e\u003cstrong data-start=\"1208\" data-end=\"1250\"\u003eFrequency response of 8 Hz – 41,500 Hz\u003c\/strong\u003e captures deep lows and crisp highs for immersive high-resolution listening. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"1371\" data-end=\"1422\"\u003e\u003cstrong data-start=\"1378\" data-end=\"1422\"\u003eSuperior Sound Engineering \u0026amp; Performance\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul data-start=\"1424\" data-end=\"1956\"\u003e\n\u003cli data-start=\"1424\" data-end=\"1633\"\u003e\n\u003cp data-start=\"1426\" data-end=\"1633\"\u003e\u003cstrong data-start=\"1426\" data-end=\"1445\"\u003e300 Ω impedance\u003c\/strong\u003e and \u003cstrong data-start=\"1450\" data-end=\"1472\"\u003e104 dB sensitivity\u003c\/strong\u003e provide detailed, controlled sound suitable for use with high-quality headphone amplifiers or DACs for best performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1634\" data-end=\"1817\"\u003e\n\u003cp data-start=\"1636\" data-end=\"1817\"\u003e\u003cstrong data-start=\"1636\" data-end=\"1672\"\u003eUltra-light aluminum voice coils\u003c\/strong\u003e improve \u003cstrong data-start=\"1681\" data-end=\"1724\"\u003etransient response and impulse fidelity\u003c\/strong\u003e, reducing distortion and delivering accurate detail. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1818\" data-end=\"1956\"\u003e\n\u003cp data-start=\"1820\" data-end=\"1956\"\u003e\u003cstrong data-start=\"1820\" data-end=\"1862\"\u003eLow total harmonic distortion (\u0026lt;0.04%)\u003c\/strong\u003e ensures clean, uncoloured audio even at higher volumes. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"1963\" data-end=\"2006\"\u003e\u003cstrong data-start=\"1971\" data-end=\"2006\"\u003ePremium Craftsmanship \u0026amp; Comfort\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul data-start=\"2008\" data-end=\"2569\"\u003e\n\u003cli data-start=\"2008\" data-end=\"2157\"\u003e\n\u003cp data-start=\"2010\" data-end=\"2157\"\u003e\u003cstrong data-start=\"2010\" data-end=\"2051\"\u003eErgonomic, lightweight build (~260 g)\u003c\/strong\u003e with plush velour ear pads and headband for long-session comfort. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2158\" data-end=\"2319\"\u003e\n\u003cp data-start=\"2160\" data-end=\"2319\"\u003eDesigned and manufactured with high-quality components, including robust open-back housings and breathable materials. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2320\" data-end=\"2569\"\u003e\n\u003cp data-start=\"2322\" data-end=\"2389\"\u003e\u003cstrong data-start=\"2322\" data-end=\"2351\"\u003eDetachable premium cables\u003c\/strong\u003e included for flexible connectivity:\u003c\/p\u003e\n\u003cul data-start=\"2392\" data-end=\"2569\"\u003e\n\u003cli data-start=\"2392\" data-end=\"2447\"\u003e\n\u003cp data-start=\"2394\" data-end=\"2447\"\u003e\u003cstrong data-start=\"2394\" data-end=\"2419\"\u003eBalanced 4.4 mm cable\u003c\/strong\u003e for high-fidelity systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2450\" data-end=\"2569\"\u003e\n\u003cp data-start=\"2452\" data-end=\"2569\"\u003e\u003cstrong data-start=\"2452\" data-end=\"2479\"\u003eUnbalanced 6.3 mm cable\u003c\/strong\u003e with \u003cstrong data-start=\"2485\" data-end=\"2503\"\u003e3.5 mm adapter\u003c\/strong\u003e for broader compatibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":51968780927268,"sku":null,"price":367.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/5908\/5348\/files\/Sennheiser_HD_660_S2_Open-Back_Wired_Headphones_Premium_High-Fidelity_Audio.jpg?v=1769680356","url":"https:\/\/uk.techoutletdirect.com\/products\/sennheiser-hd-660-s2-openback-wired-over-earheadphones","provider":"Digishop Australia","version":"1.0","type":"link"}