{"indrexa_id":"13b594eb-4d69-57e4-afbd-964177e12055","category_id":"headphones","product_title":"Koss KPH40 Utility On-Ear Headphones, Detachable Interchangeable Cord System, Retro Style, Ultra Lightweight Design (Stealth Black)","brand":"Koss","upc":"021299197455","asin":"B09KZC94X1","semantic_description":"The Koss KPH40 Utility is a wired, open-back, on-ear headphone featuring a retro aesthetic, stainless steel chassis, and 60-ohm impedance with a detachable interchangeable 3.5mm cord system. Its ultra-lightweight build and soft foam ear cushions make it well-suited for extended home listening, casual audiophile use, and desktop setups where sound openness is preferred over isolation. Durability and fit have received mixed user feedback, with some reporting the headphones feel fragile or are too small for larger heads.","best_for_summary":"Best for casual audiophiles and home listeners who want an open, airy soundstage in a lightweight, retro-styled wired on-ear headphone.","not_ideal_for":["users needing noise isolation in loud environments","people with larger head sizes seeking a secure fit","those who prefer wireless or Bluetooth connectivity"],"use_case_tags":["home","audiophile","budget-friendly","office","podcast"],"buyer_profile_tags":["audiophile","budget-conscious","casual-listener"],"manufacturer_description":"Open-Back, On-Ear Design, Retro LookUltra Lightweight, Stainless Steel ChassisAudiophile Sound PerformanceSoft, Foam Ear Cushions3.5mm Utility Cord Included","feature_bullets":["Open-Back, On-Ear Design, Retro Look","Ultra Lightweight, Stainless Steel Chassis","Audiophile Sound Performance","Soft, Foam Ear Cushions","3.5mm Utility Cord Included"],"spec_table":[{"field":"Brand","value":"Koss"},{"field":"Color","value":"Stealth Black"},{"field":"Ear Placement","value":"On Ear"},{"field":"Form Factor","value":"On Ear"},{"field":"Impedance","value":"60 Ohms"}],"bought_in_past_month":"300+","variants":["B09KZC94X1","B0BV34NDQX"],"shipping_amount":"FREE","manufacturer":"Koss","climate_pledge_friendly":false,"category_specs":{"is_foldable":false,"is_wireless":false,"is_open_back":true,"impedance_ohms":60,"has_wired_option":true,"has_transparency_mode":false,"has_multipoint_connection":false,"has_active_noise_cancellation":false},"review_intelligence":{"total_reviews":1331,"average_rating":4.4,"rating_distribution":{"1_star":"5%","2_star":"3%","3_star":"6%","4_star":"16%","5_star":"70%"},"top_positive_themes":["Sound quality (338)","Comfort (148)","Value for money (135)","Build quality (128)","Weight (114)"],"top_negative_themes":[],"top_mixed_themes":["Durability (94)","Fit (58)","Cable (50)"],"review_summary":"Customers praise these headphones for their sound quality, with one noting clear mids, and appreciate their comfort, with one mentioning they can wear them all day without discomfort. The headphones receive positive feedback for their value, build quality, and lightweight design that makes them suitable for all-day use. Regarding durability, while some find them sturdy enough to last, others report they fall apart easily. The fit and cable system receive mixed reviews, with some finding them comfortable while others say the headband doesn't fit well, and while many like the cable system, one finds it annoying.","reliability_score":"mixed"},"best_offer":{"retailer":"amazon","retailer_id":"B09KZC94X1","price_usd":39.99,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/koss-kph40-utility-on-ear-headphones-13b594eb/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":"B09KZC94X1","price_usd":39.99,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/koss-kph40-utility-on-ear-headphones-13b594eb/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":"Koss KPH40 Utility On-Ear Headphones, Detachable Interchangeable Cord System, Retro Style, Ultra Lightweight Design (Stealth Black)","brand":{"@type":"Brand","name":"Koss"},"description":"The Koss KPH40 Utility is a wired, open-back, on-ear headphone featuring a retro aesthetic, stainless steel chassis, and 60-ohm impedance with a detachable interchangeable 3.5mm cord system. Its ultra-lightweight build and soft foam ear cushions make it well-suited for extended home listening, casual audiophile use, and desktop setups where sound openness is preferred over isolation. Durability and fit have received mixed user feedback, with some reporting the headphones feel fragile or are too small for larger heads.","sku":"13b594eb-4d69-57e4-afbd-964177e12055","identifier":[{"@type":"PropertyValue","name":"asin","value":"B09KZC94X1"},{"@type":"PropertyValue","name":"indrexa_id","value":"13b594eb-4d69-57e4-afbd-964177e12055"}],"offers":[{"@type":"Offer","url":"https://www.indrexa.com/go/koss-kph40-utility-on-ear-headphones-13b594eb/amazon","priceCurrency":"USD","price":39.99,"availability":"https://schema.org/InStock","seller":{"@type":"Organization","name":"Amazon"}}],"additionalProperty":[],"gtin":"021299197455","aggregateRating":{"@type":"AggregateRating","ratingValue":4.4,"reviewCount":1331}}}