{"product_id":"sennheiser-hd660s","title":"Sennheiser HD 660 S | Open-Back Dynamic Headphones","description":"\u003cp\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto; width: 75%;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/sennheiser-logo-black-on-white_2048x2048.jpg?v=1675372784\" alt=\"Sennheiser official black and white logo\"\u003e\u003c\/p\u003e\n\u003cstyle\u003e\u003c!--\ntable, th, td {\n  background-color: #f6f6f6;\n}\nth, td {\n  padding: 20px;\n}\n--\u003e\u003c\/style\u003e\n\u003ctable width=\"90%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan style=\"color: #a30e0b;\"\u003e\u003cstrong\u003e**DISCONTINUED: \u003c\/strong\u003e\u003c\/span\u003eSennheiser's HD 660 S is sold out and discontinued. Check out the newer, \u003ca href=\"https:\/\/bloomaudio.mom\/products\/sennheiser-hd660s2\"\u003eHD 660S2\u003c\/a\u003e!\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eThe Powerhouse Sennheiser HD 660 S Open-back Connects You to the Deepest Corners of your Music\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOpen-Back, Dynamic, Over-ear Headphones with High Fidelity sound\u003c\/li\u003e\n\u003cli\u003eAesthetic upgrade to a timeless design\u003c\/li\u003e\n\u003cli\u003ePrecise, ultra-low distortion 42mm transducers with aluminum voice coils\u003c\/li\u003e\n\u003cli\u003eClear treble, warm bass, exceptional accuracy, and stereo spacial characteristics\u003c\/li\u003e\n\u003cli\u003eLuxurious comfort and detachable cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Sennheiser HD 660 S\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/HD_660S_ATF_Extra_Product_Image_4_2048x2048.jpg?v=1667848423\"\u003e\u003c\/p\u003e\n\u003ch3\u003eA Direct Connection To Your Music\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eKnown for their engaging signatures and liquid-smooth response, HD 660S predecessors HD 650 and HD 600 shattered performance barriers in the audiophile headphone category.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe HD 660 S transcends the best of that storied DNA with supernatural speed and effortless instrument reproduction—even at the bookends of the frequency spectrum. Utilizing an all-new transducer and specially ventilated drive unit, the HD 660 S delivers the revealing, tack-sharp detail audiophiles demand without sacrificing the engaging dynamics that make music so enjoyable.\u003c\/p\u003e\n\u003ch3\u003eFrom Our Ears To Yours\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIn just one listen you will understand why the HD 660S is so special. Thousands of listening sessions later its purpose is even clearer.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhat you hear each and every time is the result of an open-back earcup mated to a new transducer tuned for the modern audiophile. Its speedy response is perfectly suited for reproducing those frequency-stretching recordings with confidence. Thanks to an aluminum voice coil, the 38mm diaphragm remains nimble for ultra-quick impulse fidelity across the board. This activation and rest behavior unlocks the capability to communicate tonal and spatial characteristics precisely.\u003c\/p\u003e\n\u003ch3\u003eMeshing Together\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThe steel mesh found on the HD 660 S drive unit is interesting in design but most impressive when it comes to performance.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt completes the ventilated driver, offering consistent control of air displacement to reduce turbulence. As a result, diaphragm travel is pure, letting the music—and only the music—shine in a perfect balance of integrity and expression. The steel composition allows for much tighter production tolerances, ultimately contributing to remarkably consistent characteristics of each HD 660 S produced. When combined with the open-back earcups, the sound emanating from each transducer is completely free to expand, just as it would in nature.\u003c\/p\u003e\n\u003ch3\u003eCapability, Meet Versatility\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eToday’s audiophile has more component choices than ever.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe optimized the HD 660 S for efficiency on a wider range of devices to accommodate the varying levels of power present in output amplification circuitry. At 150 ohms, the HD 660 S is the perfect partner for dedicated amplifiers, A\/V receivers, and digital audio players (DAPs)—the magnet is more powerful than its predecessors, and thus easier to drive regardless of how your setup changes over time.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Sennheiser HD660S\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/files\/HD_660S_ATF_Extra_Application_Image_1_2048x2048.jpg?v=1667848452\"\u003e\u003c\/p\u003e\n\u003ch3\u003eHandled with care\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEvery HD 660 S has experienced a matching regimen to mate each transducer to its opposite-channel counterpart.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese tolerances are extremely narrow and when bolstered by automated assembly processes, ensure that your HD 660S experience is consistent with those all over the globe. We designed it with thoughtful, lightweight materials invisible to the acoustical system without sacrificing the durability needed for daily, all-day use. With a never-ending supply of music to consume, we wanted every touch point to be soft, luxurious, and durable for those extended listening sessions.\u003c\/p\u003e\n\u003ch3\u003eIt's all about connection\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWe packed your HD 660 S with a versatile set of essential cables, each one impedance-matched with ultra-low capacitance.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe ¼\" (6.3mm) stereo connector offers the audiophile-standard plug for connection to devices such as headphone amplifiers and A\/V receivers, digital audio players, analog gear, and more. A balanced 4.4mm connector opens a pathway to a newer generation of balanced output devices (headphone amplifiers, digital audio players, etc.) that embrace this compact plug’s superior stability over time. A balanced headphone setup offers an even lower noise floor with great dynamic range when connected to balanced source\/amp circuit outputs. The listener will thus experience, a wider soundstage, tightly controlled transients, and impossibly-clear instrument separation. Each cable is 9.8' (3m) long to accommodate unencumbered listening on gear deep within your shelves or favorite listening chair, and a flexible adapter is included to reduce the 6.3mm to 3.5mm. An optional balanced cable (\u003ca href=\"https:\/\/bloomaudio.mom\/products\/sennheiser-ch650-660\" title=\"Sennheiser CH650S and CH660P\"\u003eCH 650 S\u003c\/a\u003e) is sold separately for simplified connection to 4-pin XLR jacks.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency response (speaker):\u003c\/strong\u003e 9 Hz - 41500 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSound pressure level (SPL):\u003c\/strong\u003e 104 dB (1 V)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpedance:\u003c\/strong\u003e 150Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal harmonic distortion (THD):\u003c\/strong\u003e \u0026lt; 0.04% (1 kHz, 100dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransducer principle:\u003c\/strong\u003e dynamic, open\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 260g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEar coupling:\u003c\/strong\u003e circumaural\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic field:\u003c\/strong\u003e 2.5 mT\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Sennheiser US Warranty Conditions\" href=\"https:\/\/www.sennheiser-hearing.com\/en-US\/warranty-conditions\" target=\"_blank\"\u003eSennheiser 2 Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSennheiser HD 660 S Wired Headphones\u003c\/li\u003e\n\u003cli\u003e6.3mm (F) to 3.5mm (M) adapter\u003c\/li\u003e\n\u003cli\u003e9.8' (3m) balanced cable with 4.4mm Pentaconn\u003c\/li\u003e\n\u003cli\u003e9.8' (3m) cable with 6.3mm connector\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/assets.sennheiser.com\/global-downloads\/file\/9756\/HD660S_Manual_042021.pdf\" title=\"Sennheiser HD660S User Manual\" target=\"_blank\"\u003eUser Manual\u003c\/a\u003e \u0026amp; storage box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":39818031169611,"sku":"HD660S","price":349.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0023\/9255\/5595\/products\/sennheiser-hd660s-headphones-slight-profile.jpg?v=1669724403","url":"https:\/\/bloomaudio.mom\/products\/sennheiser-hd660s","provider":"Bloom Audio","version":"1.0","type":"link"}