{"indrexa_id":"a4e53b50-141d-5a23-88c4-3602952d8b9d","category_id":"headphones","product_title":"Panasonic Headphones On-Ear Lightweight with XBS RP-HT21 (Black & Silver)","brand":"Panasonic","upc":"163120595181 379882590528 182682341180 037988259052 100177326832 132017749488 689076738811 805095870770 804066527064 809185306859 069060216189 115970817241 012301986938 088037945464 112840387064 012307101014 675903999548 617407404531 012303529904 742996787564 808111645451 809385156292","asin":"B00004T8R2","semantic_description":"The Panasonic RP-HT21 is a wired, on-ear headphone weighing just 1.2 oz, featuring 30mm neodymium drivers and an XBS (Extra Bass System) port designed to boost low-frequency response. It uses an open-air design with a wide ergonomic headband and foam-cushioned earpads, and includes a 4.5-foot cord suited for desktop or casual home use. Reviewers praise sound quality and comfort, though durability is inconsistent — some units have broken after very few uses.","best_for_summary":"Best for casual home or desktop listeners who want lightweight, comfortable on-ear headphones with enhanced bass without needing wireless or noise-cancelling features.","not_ideal_for":["Users needing wireless or Bluetooth connectivity","Those requiring durability for frequent travel or heavy daily use","Listeners who need a built-in microphone for calls"],"use_case_tags":["home","office","budget-friendly","gift","casual-listener"],"buyer_profile_tags":["casual-listener","budget-conscious","gift-buyer"],"manufacturer_description":"The Panasonic Headphones On-Ear Lightweight with XBS RP-HT21 offer full-bodied sound free of the discomfort that can sometimes accompany earbud-style earphones. Weighing only 1.2 ounces, these lightweight headphones feature a wide, ergonomic headband and foam-cushioned earpads that feel secure yet never intrusive, providing hours of listening comfort. Large, 30mm magnetic neodymium drivers deliver clear, natural-sounding mids and highs while the XBS (Extra Bass System) port increases low-frequency response to bring alive music and movies. The 4.5-feet cord threads comfortably through clothing and bags and reaches the computer across your desk.","feature_bullets":["WIRED ON-EAR HEADPHONES - Lightweight, open-air design on-ear headphones weigh just 1.2 ounces without cable","ON-EAR STEREO AUDIO - 30mm large neodymium drivers deliver rich powerful bass and natural treble","IMPROVED BASS RESPONSE - XBS port magnifies low-frequency sound for full, robust bass","WIDE, ERGONOMIC HEADBAND - Comfort-fit with a wide headband and foam-cushioned earcups for added listening comfort","EXTENDED HEADPHONE CORD - Long 4.5-ft. cord threads comfortably through clothing and bags"],"spec_table":[{"field":"Brand","value":"Panasonic"},{"field":"Color","value":"Black"},{"field":"Ear Placement","value":"On Ear"},{"field":"Form Factor","value":"On Ear"},{"field":"Impedance","value":"30 Ohms"}],"bought_in_past_month":"100+","variants":["B00004T8R2","B075LT8YLR","B0FD7YB9Q8","B0DBPHZ88Y","B0FD82JL2F","B00004T8R2","B075LT8YLR","B08HCQ23DF","B00009RDIF","B08HBBF6FR"],"shipping_amount":"FREE","manufacturer":"Panasonic","climate_pledge_friendly":false,"category_specs":{"is_foldable":false,"is_wireless":false,"is_open_back":true,"impedance_ohms":30,"has_wired_option":true,"has_transparency_mode":false,"has_multipoint_connection":false,"has_active_noise_cancellation":false},"review_intelligence":{"total_reviews":15674,"average_rating":4.4,"rating_distribution":{"1_star":"4%","2_star":"3%","3_star":"9%","4_star":"17%","5_star":"67%"},"top_positive_themes":["Sound quality (2,700)","Value for money (2,300)","Quality (1,700)","Comfort (1,300)","Functionality (993)","Weight (778)"],"top_negative_themes":[],"top_mixed_themes":["Durability (829)","Fit (804)"],"review_summary":"Customers find these headphones excellent in sound quality, with clear highs and good value for money. They are comfortable, sitting well on the head and being soft on the ears, and work particularly well with MacBook Pro. While some customers say they last longer than most headphones, others report them breaking within 3 wears. The fit receives mixed feedback, with some finding them snug while others say they're too tight.","reliability_score":"mixed"},"best_offer":{"retailer":"amazon","retailer_id":"B00004T8R2","price_usd":15.93,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/panasonic-rp-ht21-lightweight-headphones-a4e53b50/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":"B00004T8R2","price_usd":15.93,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/panasonic-rp-ht21-lightweight-headphones-a4e53b50/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":"Panasonic Headphones On-Ear Lightweight with XBS RP-HT21 (Black & Silver)","brand":{"@type":"Brand","name":"Panasonic"},"description":"The Panasonic RP-HT21 is a wired, on-ear headphone weighing just 1.2 oz, featuring 30mm neodymium drivers and an XBS (Extra Bass System) port designed to boost low-frequency response. It uses an open-air design with a wide ergonomic headband and foam-cushioned earpads, and includes a 4.5-foot cord suited for desktop or casual home use. Reviewers praise sound quality and comfort, though durability is inconsistent — some units have broken after very few uses.","sku":"a4e53b50-141d-5a23-88c4-3602952d8b9d","identifier":[{"@type":"PropertyValue","name":"asin","value":"B00004T8R2"},{"@type":"PropertyValue","name":"indrexa_id","value":"a4e53b50-141d-5a23-88c4-3602952d8b9d"}],"offers":[{"@type":"Offer","url":"https://www.indrexa.com/go/panasonic-rp-ht21-lightweight-headphones-a4e53b50/amazon","priceCurrency":"USD","price":15.93,"availability":"https://schema.org/InStock","seller":{"@type":"Organization","name":"Amazon"}}],"additionalProperty":[],"gtin":"163120595181 379882590528 182682341180 037988259052 100177326832 132017749488 689076738811 805095870770 804066527064 809185306859 069060216189 115970817241 012301986938 088037945464 112840387064 012307101014 675903999548 617407404531 012303529904 742996787564 808111645451 809385156292","aggregateRating":{"@type":"AggregateRating","ratingValue":4.4,"reviewCount":15674}}}