{"indrexa_id":"879e225e-bddf-5c77-960b-a86e76243d88","category_id":"headphones","product_title":"Koss Pro4AA Studio Quality Over-Ear Headphones, Retro Style, Full-Size, Beige","brand":"Koss","upc":"531479658886 021299001615 212991027359 021299102725 887518466432 029521551587 887518419018","asin":"B00004Z7G9","semantic_description":"The Koss Pro4AA is a full-size, over-ear wired headphone with a retro design dating back to 1970, featuring an 8-foot coiled cord with a 6.3mm (1/4-inch) plug and passive noise isolation via its closed over-ear design. It is rated at 16 ohms impedance and targets studio, home listening, and field recording use cases where high-fidelity audio and noise isolation are priorities. Comfort and fit are inconsistent across users — some find them too tight for extended wear — and the heavyweight build, while praised for durability by many, draws complaints from others.","best_for_summary":"Best for studio enthusiasts, podcasters, and field recorders who want a legendary, high-fidelity wired headphone with strong passive noise isolation and don't mind a retro, full-size form factor.","not_ideal_for":["Users needing wireless or Bluetooth connectivity","Those sensitive to tight or heavy headphones","Commuters or travelers looking for a portable, foldable design"],"use_case_tags":["studio","home","audiophile","podcast","noise-cancelling"],"buyer_profile_tags":["audiophile","music-producer","casual-listener"],"manufacturer_description":"1970 - Koss set the standard for full-size professional headphones with the iconic Pro/4AALEGENDARY SOUND - The first dynamic headphones to deliver true full frequency and high fidelity performanceICONIC DESIGN – One of the most recognizable headphones around the worldNOISE ISOLATING – Over ear design with superior noise isolationCOIL CORD – Compact 8 ft coiled cord with 6.3mm (1/4 in) plugHIGH FIDELITY AUDIO – 250 ohms / 10-25,000","feature_bullets":["1970 - Koss set the standard for full-size professional headphones with the iconic Pro/4AA","LEGENDARY SOUND - The first dynamic headphones to deliver true full frequency and high fidelity performance","ICONIC DESIGN – One of the most recognizable headphones around the world","NOISE ISOLATING – Over ear design with superior noise isolation","COIL CORD – Compact 8 ft coiled cord with 6.3mm (1/4 in) plug","HIGH FIDELITY AUDIO – 250 ohms / 10-25,000"],"spec_table":[{"field":"Brand","value":"Koss"},{"field":"Color","value":"Beige"},{"field":"Ear Placement","value":"Over Ear"},{"field":"Form Factor","value":"Over Ear"},{"field":"Impedance","value":"16 Ohms"}],"bought_in_past_month":"100+","variants":null,"shipping_amount":"FREE","manufacturer":"Koss Corporation","climate_pledge_friendly":false,"category_specs":{"is_foldable":false,"is_wireless":false,"is_open_back":false,"impedance_ohms":250,"has_wired_option":true,"has_transparency_mode":false,"has_multipoint_connection":false,"has_active_noise_cancellation":false},"review_intelligence":{"total_reviews":941,"average_rating":4.4,"rating_distribution":{"1_star":"5%","2_star":"4%","3_star":"6%","4_star":"12%","5_star":"73%"},"top_positive_themes":["Sound quality (290)","Build quality (214)","Value for money (60)","Noise cancellation (57)"],"top_negative_themes":["Weight (139)"],"top_mixed_themes":["Comfort (135)","Durability (81)","Fit (68)"],"review_summary":"Customers praise these headphones for their awesome sound quality, built like tanks construction, and excellent noise isolation that makes them ideal for field recording in loud environments. Customers find them well worth the price. Comfort and fit receive mixed feedback - while some find them comfortable and well-fitting, others report they're uncomfortable and too tight on the head. Durability opinions are also mixed, with some reporting they've lasted over 40 years while others say they're falling apart.","reliability_score":"mixed"},"best_offer":{"retailer":"amazon","retailer_id":"B00004Z7G9","price_usd":79.99,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/koss-pro4aa-studio-quality-over-ear-879e225e/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":"B00004Z7G9","price_usd":79.99,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/koss-pro4aa-studio-quality-over-ear-879e225e/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 Pro4AA Studio Quality Over-Ear Headphones, Retro Style, Full-Size, Beige","brand":{"@type":"Brand","name":"Koss"},"description":"The Koss Pro4AA is a full-size, over-ear wired headphone with a retro design dating back to 1970, featuring an 8-foot coiled cord with a 6.3mm (1/4-inch) plug and passive noise isolation via its closed over-ear design. It is rated at 16 ohms impedance and targets studio, home listening, and field recording use cases where high-fidelity audio and noise isolation are priorities. Comfort and fit are inconsistent across users — some find them too tight for extended wear — and the heavyweight build, while praised for durability by many, draws complaints from others.","sku":"879e225e-bddf-5c77-960b-a86e76243d88","identifier":[{"@type":"PropertyValue","name":"asin","value":"B00004Z7G9"},{"@type":"PropertyValue","name":"indrexa_id","value":"879e225e-bddf-5c77-960b-a86e76243d88"}],"offers":[{"@type":"Offer","url":"https://www.indrexa.com/go/koss-pro4aa-studio-quality-over-ear-879e225e/amazon","priceCurrency":"USD","price":79.99,"availability":"https://schema.org/InStock","seller":{"@type":"Organization","name":"Amazon"}}],"additionalProperty":[],"gtin":"531479658886 021299001615 212991027359 021299102725 887518466432 029521551587 887518419018","aggregateRating":{"@type":"AggregateRating","ratingValue":4.4,"reviewCount":941}}}