{"indrexa_id":"b8256344-e51a-5ec3-bc03-d60bef8589c1","category_id":"headphones","product_title":"Sennheiser HD 400S Closed-Back Over-Ear Wired Headphones Comfortable Design","brand":"Sennheiser","upc":"615104327870","asin":"B07NFQ9FQQ","semantic_description":"The Sennheiser HD 400S is a closed-back, over-ear wired headphone with 18-ohm impedance, designed for everyday listening on phones and portable devices. It features a foldable design, soft ear pads, and an inline one-button smart remote with microphone for music control and hands-free calls. Passive noise isolation makes it suitable for commuting and office use, though some users report discomfort during extended wear due to narrow ear cups, and long-term durability has been inconsistent.","best_for_summary":"Best for casual listeners and commuters who want a foldable, wired over-ear headphone with inline call controls and Sennheiser-tuned sound for everyday use.","not_ideal_for":["Users needing active noise cancellation","Those with larger ears who require a wide ear cup fit","Buyers seeking long-term durability for heavy daily use"],"use_case_tags":["commuting","travel","office","home","calls"],"buyer_profile_tags":["commuter","casual-listener","remote-worker"],"manufacturer_description":"The HD 400S features a one-button smart remote conveniently located on the cable, which allows you to control music and take calls with ease, and the sturdy folding design makes these headphones durable and compact enough to be taken anywhere. Sennheiser dynamic drivers deliver a well-extended sound response with dynamic bass.Sennheiser support:contactcenter@sennheiser-hearing.com\\860-598-7800","feature_bullets":["Balanced Sennheiser sound: Signature Sennheiser tuning delivers clear mids, detailed highs, and controlled bass for enjoyable everyday listening.","Closed-back design for passive noise reduction: Over-ear fit helps reduce ambient noise so you can stay focused on your music, calls, or work.","Inline smart remote and mic: One-button control lets you play music, pause, skip tracks, and take calls without reaching for your device.","Lightweight and comfortable: Soft ear pads and a secure fit make the HD 400S easy to wear for long listening sessions at home or on the go.","Foldable for easy portability: Durable folding design makes it simple to pack the headphones for commuting, travel, or everyday carry."],"spec_table":[{"field":"Brand","value":"Sennheiser"},{"field":"Color","value":"Black"},{"field":"Ear Placement","value":"Over Ear"},{"field":"Form Factor","value":"Over Ear"},{"field":"Impedance","value":"18 Ohms"}],"bought_in_past_month":null,"variants":["B07NFQ9FQQ","B0GFXQ9SSZ"],"shipping_amount":"FREE","manufacturer":"Sennheiser","climate_pledge_friendly":false,"category_specs":{"is_foldable":true,"is_wireless":false,"is_open_back":false,"impedance_ohms":18,"has_wired_option":true,"has_transparency_mode":false,"has_multipoint_connection":false,"has_active_noise_cancellation":false},"review_intelligence":{"total_reviews":2716,"average_rating":4.3,"rating_distribution":{"1_star":"6%","2_star":"4%","3_star":"9%","4_star":"16%","5_star":"65%"},"top_positive_themes":["Sound quality (146)","Quality (73)","Value for money (58)","Noise cancellation (24)"],"top_negative_themes":[],"top_mixed_themes":["Comfort (93)","Fit (38)","Reliability (25)","Durability (20)"],"review_summary":"Customers find these headphones excellent for cell phones and mp3 players, with good sound quality and noise cancellation, and consider them great value for money. The comfort and fit receive mixed feedback - while some find them comfortable, others report ear pain after extended use, and the ear cups are too narrow. Reliability is also mixed, with some saying they work well while others report issues with the right side failing. Durability is also mixed, with some finding them durable while others report materials deteriorating after three months of use.","reliability_score":"mixed"},"best_offer":{"retailer":"amazon","retailer_id":"B07NFQ9FQQ","price_usd":67.99,"original_price_usd":89.95,"affiliate_url":"https://www.indrexa.com/go/sennheiser-hd-400s-closed-back-over-ear-b8256344/amazon","in_stock":true,"shipping":{"free_shipping_available":null,"free_shipping_note":null,"min_order_for_free_shipping":null},"last_updated":"2026-07-18T08:45:55.660074+00:00"},"all_offers":[{"retailer":"amazon","retailer_id":"B07NFQ9FQQ","price_usd":67.99,"original_price_usd":89.95,"affiliate_url":"https://www.indrexa.com/go/sennheiser-hd-400s-closed-back-over-ear-b8256344/amazon","in_stock":true,"shipping":{"free_shipping_available":null,"free_shipping_note":null,"min_order_for_free_shipping":null},"last_updated":"2026-07-18T08:45:55.660074+00:00"}],"_llm_hints":{"best_offer_logic":"lowest price among in-stock offers","out_of_stock_offers_included":true,"use_affiliate_url":"always use affiliate_url field, never construct retailer URLs manually","shipping_note":"shipping costs are estimates only — final cost depends on user location and membership status","null_fields":"null spec or review fields mean data was unavailable from source — do not infer values","manufacturer_description":"brand's own product description — official copy from Amazon listing","feature_bullets":"array of manufacturer's bullet-point features from Amazon listing","spec_table":"raw structured spec table from Amazon — category-specific technical specs","bought_in_past_month":"Amazon demand signal — number of units sold in past 30 days","variants":"array of ASINs for color/size variants of this product","shipping_amount":"shipping cost signal — FREE indicates free shipping available","climate_pledge_friendly":"Amazon Climate Pledge Friendly badge — sustainability certification","data_freshness":"checked_at timestamp from most recent price record","best_offer_null_means":"all known offers are currently out of stock — check all_offers for availability"},"json_ld":{"@context":"https://schema.org","@type":"Product","name":"Sennheiser HD 400S Closed-Back Over-Ear Wired Headphones Comfortable Design","brand":{"@type":"Brand","name":"Sennheiser"},"description":"The Sennheiser HD 400S is a closed-back, over-ear wired headphone with 18-ohm impedance, designed for everyday listening on phones and portable devices. It features a foldable design, soft ear pads, and an inline one-button smart remote with microphone for music control and hands-free calls. Passive noise isolation makes it suitable for commuting and office use, though some users report discomfort during extended wear due to narrow ear cups, and long-term durability has been inconsistent.","sku":"b8256344-e51a-5ec3-bc03-d60bef8589c1","identifier":[{"@type":"PropertyValue","name":"asin","value":"B07NFQ9FQQ"},{"@type":"PropertyValue","name":"indrexa_id","value":"b8256344-e51a-5ec3-bc03-d60bef8589c1"}],"offers":[{"@type":"Offer","url":"https://www.indrexa.com/go/sennheiser-hd-400s-closed-back-over-ear-b8256344/amazon","priceCurrency":"USD","price":67.99,"availability":"https://schema.org/InStock","seller":{"@type":"Organization","name":"Amazon"}}],"additionalProperty":[],"gtin":"615104327870","aggregateRating":{"@type":"AggregateRating","ratingValue":4.3,"reviewCount":2716}}}