{"title":"Open Back Headphones","description":"\u003ch2\u003eOpen Back Headphones\u003c\/h2\u003e\n\u003cp\u003eWelcome to the collection of Open-Back Headphones, the preferred format for audiophiles, producers, and serious music lovers seeking the most natural, spacious, and accurate sound reproduction.\u003c\/p\u003e","products":[{"product_id":"hd-560s","title":"HD 560S","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eSennheiser HD 560S open-back headphones are tuned for listeners who want to understand a recording rather than simply add emphasis to it. Their revealing presentation combines a wide sound field with a smooth bass response, making them appropriate for close musical evaluation as well as relaxed hi-fi listening.\u003c\/p\u003e\u003cp\u003eAngled transducers are designed to recreate the geometry of an optimal triangular speaker-listening position. A lightweight construction and velour earpads help make extended sessions comfortable, so you can follow an album or examine a mix without unnecessary wearing weight.\u003c\/p\u003e\u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalytical sound tuning:\u003c\/strong\u003e Hear detail across the audio path while retaining the bass response needed for complex modern recordings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAngled transducers:\u003c\/strong\u003e Driver positioning supports a wide, articulate soundstage for understanding placement within a recording.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-back construction:\u003c\/strong\u003e The acoustic design prioritizes a spacious presentation for attentive listening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight 240 g build:\u003c\/strong\u003e Low weight without the cable helps reduce the physical burden of longer sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVelour earpads:\u003c\/strong\u003e Soft ear contact surfaces complement the headphone’s extended-listening focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetachable cable:\u003c\/strong\u003e The 1.8 m cable gives useful reach to nearby listening equipment and can be removed from the headphone.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eHD 560S uses dynamic, open transducers with a 120-ohm impedance and a 6 Hz–38 kHz frequency response at -10 dB. Its 110 dB sound-pressure rating is measured at 1 kHz\/1 V RMS, while total harmonic distortion is below 0.05% at 1 kHz and 90 dB SPL.\u003c\/p\u003e\u003cp\u003eThe angled driver arrangement shapes the listening geometry rather than relying on surround processing. The headphone weighs 240 g without its cable, and velour pads support the lightweight design’s focus on sustained listening comfort.\u003c\/p\u003e\u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\u003cp\u003eHD 560S suits hi-fi enthusiasts, detail-focused music listeners and people performing music-evaluation tasks. Its open-back design makes a quiet listening environment preferable when the goal is to hear subtle changes in a recording rather than isolate yourself from a busy room.\u003c\/p\u003e\u003ch2\u003eCompatibility and Connectivity\u003c\/h2\u003e\u003cp\u003eThe detachable 1.8 m cable uses a 6.35 mm plug, with a flexible 3.5 mm adapter for matching smaller headphone outputs. Suitable sources include headphone-equipped audio interfaces, receivers, laptops and digital audio players. Output capability varies by source, so the 120-ohm load should be considered when selecting listening equipment.\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":40614481068226,"sku":"509144","price":149.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/9636\/8578\/products\/product_detail_x2_desktop_HD_560S_sennheiser_01_776884e5-6c12-4dc0-a472-4047b6f6deb3.jpg?v=1755694757"},{"product_id":"hd-600","title":"HD 600","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eSennheiser HD 600 is an open-back reference headphone for analytical music listening and technical playback. Its natural, spatial presentation is designed to help the listener examine a recording without relying on an exaggerated sound balance.\u003c\/p\u003e\u003cp\u003eOpen metal-mesh earcup covers, carefully optimized magnet systems and lightweight voice coils contribute to the acoustic design. A circumaural fit and detachable cable make the headphone a practical component in a dedicated hi-fi or reference-listening setup.\u003c\/p\u003e\u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference-oriented reproduction:\u003c\/strong\u003e A natural, accurate presentation supports close attention to recording and playback differences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen metal-mesh covers:\u003c\/strong\u003e The earcup construction supports an acoustically transparent listening experience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized magnet systems:\u003c\/strong\u003e Computer-optimized components are designed to reduce harmonic and intermodulation distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight aluminum voice coils:\u003c\/strong\u003e Low moving mass supports responsive handling of musical transients.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeodymium magnet design:\u003c\/strong\u003e The magnetic system supports sensitivity and dynamic-range performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetachable OFC cable:\u003c\/strong\u003e The copper cable is designed for low handling noise and can be removed from the headphone.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eThe dynamic, open headphone has a 300-ohm impedance and a 12–40,500 Hz frequency response. Sound pressure is listed at 97 dB\/1 V, with distortion below 0.1% at 1 kHz\/1 V in the detailed specification.\u003c\/p\u003e\u003cp\u003eWeight is 260 g without the cable, and the circumaural headband construction has a specified contact pressure of 6.0 N ±1 N. A three-metre cable supports a comfortable listening distance from desktop or home equipment.\u003c\/p\u003e\u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\u003cp\u003eHD 600 suits audiophiles and technical listeners seeking a familiar reference for recordings, equipment evaluation and close musical listening. Its open construction is most useful in a quiet space where detail matters more than blocking external noise.\u003c\/p\u003e\u003ch2\u003eCompatibility and Connectivity\u003c\/h2\u003e\u003cp\u003eThe detachable cable terminates in a 3.5 mm stereo plug, with a 6.35 mm adapter arrangement listed in the product data. Select a suitable analog headphone output and an amplifier capable of driving a 300-ohm headphone. Bluetooth and microphone functions are not specified.\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":40614812090562,"sku":"508824","price":329.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/9636\/8578\/files\/hd_600_product_shot_iso_v1.png?v=1755694756"},{"product_id":"hd-599-se","title":"HD 599 SE","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Sennheiser HD 599 SE is an open-back, over-ear headphone designed for discovering detail and natural spatial presentation in home listening. Its proprietary transducer technology brings music into focus without relying on wireless processing or active noise cancellation.\u003c\/p\u003e\u003cp\u003eLarge earcups and soft, replaceable pads make comfort part of the listening experience. With detachable cables for different setups, HD 599 SE provides an approachable route into dedicated hi-fi listening and a practical fit for a listening room.\u003c\/p\u003e\u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-back acoustics:\u003c\/strong\u003e A spacious, natural presentation helps you explore the placement and texture of sounds within a recording.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eE.A.R. transducer positioning:\u003c\/strong\u003e Ergonomic Acoustic Refinement channels the audio signal toward your ears to support the intended listening presentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e38 mm Sennheiser transducers:\u003c\/strong\u003e Purpose-designed drivers form the basis of detailed music reproduction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft replaceable earpads:\u003c\/strong\u003e Comfortable contact surfaces support longer sessions and can be replaced as they wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo detachable cables:\u003c\/strong\u003e A longer cable suits home equipment, while the shorter cable helps reduce excess length with nearby sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-size around-ear fit:\u003c\/strong\u003e Large earcups surround the ears for a comfortable alternative to on-ear pressure.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eHD 599 SE has a 50-ohm impedance and a specified frequency response of 12–38,500 Hz. Sound pressure is rated at 106 dB SPL at 1 kHz\/1 V RMS, while total harmonic distortion is below 0.1% at 1 kHz and 100 dB SPL, describing distortion under those measurement conditions.\u003c\/p\u003e\u003cp\u003eThe headphone weighs 250 g and uses 38 mm transducers in an open acoustic construction. This design prioritizes spatial presentation rather than sealed isolation, making its surroundings an important part of choosing a listening location.\u003c\/p\u003e\u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\u003cp\u003eHD 599 SE suits music enthusiasts building a comfortable home listening setup and listeners who want to rediscover subtle details in familiar albums. A quiet room is a sensible match for its open-back design, especially when spacious presentation matters more than shutting out environmental noise.\u003c\/p\u003e\u003ch2\u003eCompatibility and Connectivity\u003c\/h2\u003e\u003cp\u003eAnalog connections are provided by a detachable 3 m cable with a 6.3 mm plug and a 1.2 m cable with a 3.5 mm plug. A 6.3-to-3.5 mm adapter is also listed. Choose a source with a matching headphone output, or an appropriate adapter; this is a wired headphone without active noise cancellation.\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":40628365951170,"sku":"508697","price":199.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/9636\/8578\/products\/HD_599_Black_Product_shot_cutout_Isofront.png?v=1755694753"},{"product_id":"hd-650","title":"HD 650","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eSennheiser HD 650 is an open-back dynamic headphone for dedicated home listening and analytical evaluation. Selected acoustic components and tightly matched systems support a detailed stereo presentation built around consistency rather than added processing.\u003c\/p\u003e\u003cp\u003eA lightweight construction and comfortable velour pads support listening over longer periods. The detachable OFC copper cable and understated finish complement a headphone designed to become a lasting part of a personal hi-fi setup.\u003c\/p\u003e\u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePair-matched systems:\u003c\/strong\u003e Handpicked components with narrow ±1 dB tolerances support consistent left\/right reproduction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcoustic metal-mesh damping:\u003c\/strong\u003e A dedicated damping element controls behaviour across the diaphragm surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized magnetic system:\u003c\/strong\u003e The design aims to minimize harmonic and intermodulation distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight aluminum voice coils:\u003c\/strong\u003e Low moving mass supports responsive transient reproduction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComfortable velour pads:\u003c\/strong\u003e Soft around-ear contact surfaces support long listening sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetachable OFC cable:\u003c\/strong\u003e Highly conductive copper and low handling noise support practical, quiet cable use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eThe open dynamic system uses a 42 mm transducer with a 38 mm diaphragm and a 300-ohm impedance. Total harmonic distortion is listed below 0.05% at 1 kHz\/1 V, with sensitivity of 103 dB\/1 V.\u003c\/p\u003e\u003cp\u003eThe specified high-frequency extension reaches 41 kHz. The headphone weighs 260 g without the cable, and its three-metre cable supports a dedicated home listening position. The circumaural design and velour pads emphasize sustained listening comfort.\u003c\/p\u003e\u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\u003cp\u003eHD 650 suits music enthusiasts seeking a comfortable open-back reference for extended album listening and equipment comparison. A quiet room and a suitable headphone amplifier help make the most of its analytical role and 300-ohm load.\u003c\/p\u003e\u003ch2\u003eCompatibility and Connectivity\u003c\/h2\u003e\u003cp\u003eThe cable uses a 6.35 mm stereo plug, with an adapter lead to 3.5 mm listed. Match the analog connection to your equipment and choose an output appropriate for the headphone’s impedance. The documented setup is wired, with no Bluetooth or active noise-cancelling connection specified.\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":40628942438594,"sku":"508825","price":339.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/9636\/8578\/products\/product_detail_x2_desktop_HD_650_Sennheiser_01.jpg?v=1755694751"},{"product_id":"hd-800-s","title":"HD 800 S","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eSennheiser HD 800 S is an open-back reference headphone designed around a natural, expansive sound field. Its 56 mm dynamic transducers direct sound toward the ears at an angle, while absorber technology controls resonant energy that can obscure finer musical detail.\u003c\/p\u003e\u003cp\u003eHandcrafted microfiber pads and a vibration-damping headband combine comfort with carefully considered mechanical design. Developed in Germany and precision-built in Ireland according to the current description, HD 800 S is intended for dedicated, detail-focused listening.\u003c\/p\u003e\u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e56 mm transducers:\u003c\/strong\u003e Large purpose-designed drivers form the foundation of the headphone’s spatial presentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResonance absorber technology:\u003c\/strong\u003e Absorbing unwanted resonant energy helps reveal quieter frequency detail that could otherwise be masked.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAngled sound delivery:\u003c\/strong\u003e The earcup geometry supports a natural sense of placement and acoustic space.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen circumaural design:\u003c\/strong\u003e Uncovered earcups prioritize acoustic openness over environmental isolation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandcrafted microfiber pads:\u003c\/strong\u003e Soft pads support comfort during extended listening sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamped headband construction:\u003c\/strong\u003e Layered metal and plastic construction helps attenuate vibration reaching the earcups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced cable option:\u003c\/strong\u003e Listed balanced 4.4 mm connectivity accommodates suitable reference headphone equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eThe dynamic, open headphone has a 300-ohm impedance and a specified 4–51,000 Hz response at -10 dB. Sensitivity is listed at 102 dB\/1 V, with distortion below 0.02% at 1 kHz\/1 V RMS.\u003c\/p\u003e\u003cp\u003eWeight is 330 g without the cable, and the three-metre cable supports home listening placement. The absorber system and angled 56 mm transducers address resonance and spatial reproduction through acoustic construction rather than virtual surround processing.\u003c\/p\u003e\u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\u003cp\u003eHD 800 S suits audiophiles and critical listeners seeking a spacious reference for recordings and equipment evaluation. Its open construction is best matched to quiet, dedicated listening where fine detail is not competing with environmental noise.\u003c\/p\u003e\u003ch2\u003eCompatibility and Connectivity\u003c\/h2\u003e\u003cp\u003eThe product lists 6.35 mm unbalanced and 4.4 mm balanced cable connections, with an XLR-4 cable as an optional accessory. Use the correct connection for the amplifier and a source suitable for a 300-ohm headphone. Wireless operation is not specified.\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":40630520578242,"sku":"506911","price":1799.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/9636\/8578\/products\/product_detail_x2_desktop_Sennheiser_HD-800-S_Over-Ear_02.jpg?v=1755694748"},{"product_id":"hd-599","title":"HD 599","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eSennheiser HD 599 open-back headphones bring natural spatial performance to home music listening. Proprietary Sennheiser transducers and Ergonomic Acoustic Refinement direct sound toward the ears, helping reveal the placement and subtle details that make familiar recordings worth exploring again.\u003c\/p\u003e\u003cp\u003eThe full-size, around-ear design pairs large earcups with soft replaceable pads for longer sessions. An ivory finish, brown headband stitching and matte metallic details give HD 599 a distinctive appearance that complements its dedicated listening-room role.\u003c\/p\u003e\u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural spatial presentation:\u003c\/strong\u003e Open-back acoustics create a sense of space that supports discovering detail within recordings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eE.A.R. acoustic design:\u003c\/strong\u003e Ergonomic Acoustic Refinement channels the signal toward your ears for the intended listening geometry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e38 mm proprietary transducers:\u003c\/strong\u003e Purpose-designed Sennheiser drivers provide the foundation for detailed home audio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft replaceable earpads:\u003c\/strong\u003e Comfortable pads support sustained listening and can be renewed as they wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetachable cable options:\u003c\/strong\u003e Two cable lengths let you adapt the headphone to nearby devices or equipment farther from your chair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIvory and metallic detailing:\u003c\/strong\u003e Brown stitching and matte metallic accents give the headphone a distinctive, considered finish.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eHD 599 has a 50-ohm impedance and a 12–38,500 Hz frequency response. Sensitivity is specified at 106 dB SPL at 1 kHz\/1 V RMS, with total harmonic distortion below 0.1% at 1 kHz and 100 dB SPL. These measured figures sit alongside the open acoustic design’s emphasis on natural spatial reproduction.\u003c\/p\u003e\u003cp\u003eThe headphone weighs 250 g and uses 38 mm transducers in full-size over-ear earcups. It does not use active noise cancellation, making the choice of listening environment important when evaluating quieter musical details.\u003c\/p\u003e\u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\u003cp\u003eHD 599 suits listeners seeking a comfortable first step into dedicated hi-fi headphones or an inviting everyday option for a home audio system. A quiet room is particularly suitable for its open-back presentation and detail-focused listening character.\u003c\/p\u003e\u003ch2\u003eCompatibility and Connectivity\u003c\/h2\u003e\u003cp\u003eThe listed cables are a detachable 3 m cable with a 6.3 mm plug and a 1.2 m cable with a 3.5 mm plug, with a 6.3-to-3.5 mm adapter also included. Connect to a suitable analog headphone output and select the cable that matches your setup. Wireless audio connectivity is not specified.\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":40630544728258,"sku":"506831","price":219.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/9636\/8578\/products\/product_detail_x2_desktop_HD_599_Sennheiser_01_a50907c8-900e-482a-ad1b-1c0c5f6810e1.jpg?v=1755694746"},{"product_id":"hd-660s2","title":"HD 660S2","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eSennheiser HD 660S2 brings a warm, intimate sound signature to open-back audiophile listening, with extended sub-bass adding weight beneath precise musical detail. Smooth treble and natural timbre make the presentation inviting rather than deliberately forceful.\u003c\/p\u003e\u003cp\u003eOptimized transducer airflow, a revised surround and a lightweight voice coil support the acoustic design. Plush velour pads and an ergonomic headband complement the relaxed tuning, making the headphone appropriate for longer sessions with favourite recordings.\u003c\/p\u003e\u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended sub-bass:\u003c\/strong\u003e Deeper low-frequency reach adds impact to bass instruments while preserving a natural presentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e38 mm precision transducers:\u003c\/strong\u003e Purpose-designed drivers combine detailed reproduction with the headphone’s warm tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVented magnet system:\u003c\/strong\u003e Controlled airflow and ventilation help minimize distortion in the driver assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight aluminum voice coil:\u003c\/strong\u003e Low moving mass supports responsive reproduction of musical transients.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-back breathability:\u003c\/strong\u003e The open design and plush cushions support comfortable sustained listening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIreland-built construction:\u003c\/strong\u003e The product’s listed Irish manufacture accompanies carefully developed acoustic components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo output formats:\u003c\/strong\u003e Standard 6.3 mm and balanced 4.4 mm connections accommodate suitable headphone equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eThe dynamic, open transducers use a 300-ohm impedance and cover 8–41,500 Hz. Sensitivity is specified at 104 dB at 1 kHz\/1 V RMS, with total harmonic distortion below 0.04% at 1 kHz and 100 dB.\u003c\/p\u003e\u003cp\u003eThe headphone weighs 260 g and uses a 1.8 m cable. Its optimized surround, diaphragm and vented magnetic structure address airflow and driver behaviour, while the velour pads and over-ear fit emphasize long-session comfort.\u003c\/p\u003e\u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\u003cp\u003eHD 660S2 suits audiophiles who want detailed open-back listening with a warmer balance and more substantial sub-bass. It is particularly appropriate for quiet home sessions where tonal nuance and physical comfort matter more than environmental isolation.\u003c\/p\u003e\u003ch2\u003eCompatibility and Connectivity\u003c\/h2\u003e\u003cp\u003eThe product lists 6.3 mm and balanced 4.4 mm plugs, plus a 6.3-to-3.5 mm adapter. Use the correct cable for the output and a source suitable for a 300-ohm headphone. Its connection is wired analog; Bluetooth and ANC are not part of the documented setup.\u003c\/p\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":42872720654530,"sku":"700240","price":450.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/9636\/8578\/products\/660S2.1.png?v=1755694722"},{"product_id":"hd-550","title":"HD 550","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eSennheiser HD 550 is an open-back headphone for detailed music listening and wired gaming. Its transparent presentation combines punchy bass, lifelike mids and extended treble, helping reveal information in recordings and game soundtracks without wireless transmission delay.\u003c\/p\u003e\u003cp\u003eAt 237 g, with reduced clamping force and synthetic-velour pads, HD 550 prioritizes comfort as well as sound. 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Sensitivity is specified at 106.7 dB\/1 V RMS, and distortion is below 0.2% at 1 kHz and 90 dB SPL.\u003c\/p\u003e\u003cp\u003eThe over-ear design uses synthetic-velour pads, with a 1.8 m cable providing reach to nearby equipment. Its open acoustic construction is intended for spacious listening rather than sealed environmental isolation.\u003c\/p\u003e\u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\u003cp\u003eHD 550 suits listeners upgrading a home music or gaming setup who value detail, comfort and the simplicity of wired sound. A quieter room is a sensible choice for appreciating subtle game cues and musical detail through an open-back headphone.\u003c\/p\u003e\u003ch2\u003eCompatibility and Connectivity\u003c\/h2\u003e\u003cp\u003eThe included 1.8 m cable uses a 3.5 mm plug, with a screw-on 6.35 mm adapter. The product accepts balanced cables and is described as microphone-ready, but no included microphone or balanced cable is established. 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No pairing, no lost earbuds hiding between sofa cushions—just pure sound.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt on a proven audiophile legacy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBased on the trusted HD 500 series chassis, the HD 505 is lightweight, durable, and more\u003cbr\u003ecomfy than an old pair of sneakers (and infinitely less smelly). The brilliant performance shares a great deal with the legendary HD 560S, but of course we didn’t leave well enough alone: Fine-tuned damping now ensures even smoother, fatigue-free treble and balanced bass. The lux design with copper accents, a revised synthetic leather headband, and luxurious velour ear cushions makes these cans look and feel as good as they sound. \u003cem\u003eAccessories from the HD 500 series, like cables, are compatible.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYour ticket to audiophile sound\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003eThe high-performance 120-ohm transducer in the HD 505 is made in Ireland at our own factory. You get analytic, detailed sound across an extended frequency range of 12 Hz – 38.5 kHz. Your favorite albums and video games reveal details like never before. At just 237g, you may even forget you’re wearing these plush headphones. 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