{"product_id":"sennheiser-hd550","title":"Sennheiser HD 550 Open-Back Headphones","description":"\u003cp\u003eThe Sennheiser HD 550 is an open-back, over-ear headphone built around a custom 38mm dynamic transducer manufactured at Sennheiser's audiophile production facility in Tullamore, Ireland. It delivers a neutral, balanced sound signature with punchy bass, lifelike midrange clarity, and controlled treble, designed for critical music listening, gaming, monitoring, and everyday high-fidelity use.\u003c\/p\u003e\n\u003cp\u003eThe Duofoil laminate diaphragm and lightweight voice coil minimize unwanted resonances for accurate transient response across a 6Hz to 39.5kHz frequency range. The angled driver placement inside the open-back cup creates a natural, expansive soundstage by mimicking how sound is experienced in a real acoustic space rather than firing directly into the ear canal. Total harmonic distortion is rated below 0.2% at 1kHz\/90dB SPL.\u003c\/p\u003e\n\u003cp\u003eAt 150 ohms impedance, the HD 550 benefits from a dedicated DAC\/amp but scales well with a wide range of hi-fi gear. The HD 550 is designed with replaceable parts and a microphone-ready build for long-term ownership. Velour earpads and a comfortable low-clamp headband make it suited to extended listening sessions.\u003c\/p\u003e\n\u003cp\u003eFor comparison with other Sennheiser open-backs in the collection, see the \u003ca href=\"https:\/\/adcohearing.com\/products\/sennheiser-hdb-630\"\u003eSennheiser HDB 630\u003c\/a\u003e for a closed-back wireless audiophile option at a higher price point.\u003c\/p\u003e\n\u003cp\u003eAll in-stock orders placed before 5pm EST Monday through Friday ship the same day. Free ground shipping on all orders over $9.99 within the 48 contiguous United States.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the Sennheiser HD 550 need an amplifier?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The HD 550 can be driven by phones, laptops, and audio interfaces but benefits significantly from amplification. At 150 ohms impedance, a dedicated DAC\/amp or headphone amplifier will improve dynamics, bass control, and overall headroom. An audio interface with a 6.35mm headphone output is a practical entry point.\"}},{\"@type\":\"Question\",\"name\":\"How does the HD 550 compare to the HD 560S?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Both are open-back headphones at a similar price point. The HD 560S has a slightly brighter, more forward treble tuning. The HD 550 offers improved bass extension and a more balanced overall frequency response with a toned-down upper midrange. Reviewers consistently note the HD 550 as the more natural and forgiving of the two.\"}},{\"@type\":\"Question\",\"name\":\"Is the HD 550 good for gaming?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The angled driver design creates a wide, natural soundstage that aids positional audio and spatial awareness in gaming. The microphone-ready design allows clip-on or boom microphones to be added. Note that open-back headphones provide no noise isolation and sound will leak to the surrounding environment, making them better suited to quiet home environments.\"}},{\"@type\":\"Question\",\"name\":\"Are the ear pads and cable replaceable on the HD 550?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The HD 550 is built with a replaceable cable and replaceable ear pads, and Sennheiser maintains spare parts availability for the HD 500 series.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between the HD 550 and HD 505?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The HD 505 and HD 550 share a similar chassis and driver size. The HD 550 has more bass below 100Hz and uses a different dust filter baffle design. The HD 550 uses silver color accents; the HD 505 uses copper. Both are open-back, 150-ohm designs from the HD 500 series.\"}}]}\u003c\/script\u003e\n\u003ch6\u003eFeatures\u003c\/h6\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e38mm Custom Dynamic Driver - Manufactured at Sennheiser's Tullamore, Ireland audiophile facility; angled placement for natural soundstage and spatial imaging\u003c\/li\u003e\n\u003cli\u003eDuofoil Laminate Diaphragm - Reduces unwanted resonances for accurate transient response and extended bass and treble performance\u003c\/li\u003e\n\u003cli\u003eLightweight Voice Coil - Contributes to transparent, detailed sound reproduction\u003c\/li\u003e\n\u003cli\u003eOpen-Back Design - Metal mesh earcups with acoustic foam for controlled bass response and airy, natural treble; eliminates reflections for wide soundstage\u003c\/li\u003e\n\u003cli\u003eNeutral Sound Signature - Punchy bass, neutral mids for voice intelligibility, and open treble; tuned for accuracy rather than consumer-oriented coloration\u003c\/li\u003e\n\u003cli\u003e150-Ohm Impedance - Benefits from amplification; pairs well with headphone amps, audio interfaces, and DAC\/amp units\u003c\/li\u003e\n\u003cli\u003eMicrophone-Ready Design - Compatible with clip-on and boom microphone accessories for gaming and communication setups\u003c\/li\u003e\n\u003cli\u003eReplaceable Parts - Built for long-term ownership with available spare components\u003c\/li\u003e\n\u003cli\u003eVelour Earpads - Breathable, comfortable for extended listening sessions\u003c\/li\u003e\n\u003cli\u003eDetachable 1.8m Cable - 3.5mm jack included; 6.35mm adapter included for amplifier and interface connections\u003c\/li\u003e\n\u003cli\u003eLightweight Build - 237g for reduced fatigue during long sessions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eSpecs\u003c\/h6\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Sennheiser\u003c\/li\u003e\n\u003cli\u003eModel: HD 550\u003c\/li\u003e\n\u003cli\u003eDriver: 38mm dynamic, custom (Tullamore, Ireland)\u003c\/li\u003e\n\u003cli\u003eDiaphragm: Duofoil laminate\u003c\/li\u003e\n\u003cli\u003eFrequency response: 6Hz to 39.5kHz\u003c\/li\u003e\n\u003cli\u003eImpedance: 150 ohms\u003c\/li\u003e\n\u003cli\u003eSPL: 106.7dB at 1mW\u003c\/li\u003e\n\u003cli\u003eTHD: \u0026lt;0.2% (1kHz \/ 90dB SPL)\u003c\/li\u003e\n\u003cli\u003eWeight: 237g\u003c\/li\u003e\n\u003cli\u003eCable: 1.8m detachable, 3.5mm jack\u003c\/li\u003e\n\u003cli\u003eIncludes: 3.5mm to 6.35mm adapter, drawstring bag\u003c\/li\u003e\n\u003cli\u003eDesign: Open-back, over-ear\u003c\/li\u003e\n\u003cli\u003eEar pads: Velour\u003c\/li\u003e\n\u003cli\u003eColor: Black\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eWhat's Included \u003cmeta charset=\"utf-8\"\u003e\n\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eSennheiser HD 550 headphones\u003c\/li\u003e\n\u003cli\u003e1.8m detachable cable with 3.5mm jack\u003c\/li\u003e\n\u003cli\u003e3.5mm to 6.35mm adapter\u003c\/li\u003e\n\u003cli\u003eDrawstring bag\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sennheiser","offers":[{"title":"Default Title","offer_id":48661176746212,"sku":"4318","price":349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0186\/0219\/7043\/files\/4318_1.jpg?v=1775502102","url":"https:\/\/adcohearing.com\/products\/sennheiser-hd550","provider":"ADCO Hearing Products","version":"1.0","type":"link"}