{"product_id":"hamiltonbuhl-classroom-listening-center-sop-prmb4jb","title":"HamiltonBuhl Sack-O-Phones with 4 Black Primo Headphones and 3.5mm Jackbox","description":"\u003cp\u003e\u003cstrong\u003eHamiltonBuhl® SOP-PRMB4JB Sack-O-Phones™ Listening Center\u003c\/strong\u003e is a portable classroom audio solution designed for small-group listening, literacy stations, language learning, media centers, computer labs, and shared instructional spaces. This convenient set includes four black Primo™ headphones, a 3.5mm classroom jackbox, and a Sack-O-Phones™ carry bag that doubles as a knapsack for easy transport from class to class.\u003c\/p\u003e\n\u003cp\u003eBuilt for K–12 learning environments, the Primo™ headphones feature noise-reducing earcups, durable Dura-Cord™ cabling, comfortable leatherette ear cushions, and a standard 3.5mm TRS plug for broad classroom device compatibility. The included jackbox allows multiple students to listen to the same audio source, making this kit ideal for group lessons, reading centers, testing support, and collaborative listening activities.\u003c\/p\u003e\n\u003ch2\u003e🎧 Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete small-group listening center:\u003c\/strong\u003e Includes 4 black Primo™ headphones, 1 jackbox, and 1 portable Sack-O-Phones™ carry bag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePortable Sack-O-Phones™ storage:\u003c\/strong\u003e Carry bag doubles as a knapsack, making it easy to move headphones and equipment between classrooms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour black Primo™ headphones:\u003c\/strong\u003e Durable school headphones designed for K–12 classrooms, labs, libraries, and testing environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.5mm classroom jackbox included:\u003c\/strong\u003e Allows multiple students to connect to one audio source for group listening activities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8-position listening support:\u003c\/strong\u003e Jackbox supports up to 8 headphone connections, giving teachers room to expand beyond the 4 included headphones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividual volume controls:\u003c\/strong\u003e Jackbox lets students adjust listening levels independently for comfort and focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise-reducing earcups:\u003c\/strong\u003e Helps block distracting ambient noise so students can focus on lessons, audiobooks, and assessments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDura-Cord™ construction:\u003c\/strong\u003e Chew-resistant, kink-resistant, and durable braided cord helps withstand daily classroom use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComfortable leatherette ear cushions:\u003c\/strong\u003e Over-ear cushions support extended listening and are easier to wipe clean than foam.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal 3.5mm TRS compatibility:\u003c\/strong\u003e Works with most computers, laptops, tablets, listening centers, and classroom audio devices with headphone jacks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo microphone:\u003c\/strong\u003e Designed for listening-only classroom audio activities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeal for shared learning spaces:\u003c\/strong\u003e Great for literacy centers, small-group instruction, ESL, audiobooks, and computer-based learning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassroom organization:\u003c\/strong\u003e Each headphone can be stored individually to help keep listening-center components organized.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🔌 Device Compatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with devices and audio sources that support a standard 3.5mm stereo headphone connection:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eChromebooks and school laptops\u003c\/li\u003e\n\u003cli\u003eDesktop and computer lab workstations\u003c\/li\u003e\n\u003cli\u003eTablets with 3.5mm ports or compatible adapters\u003c\/li\u003e\n\u003cli\u003eClassroom CD players and media players\u003c\/li\u003e\n\u003cli\u003eListening centers and audio systems\u003c\/li\u003e\n\u003cli\u003eInteractive whiteboard audio outputs\u003c\/li\u003e\n\u003cli\u003eLibrary and literacy center audio stations\u003c\/li\u003e\n\u003cli\u003eEducational apps, audiobooks, and digital curriculum programs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📦 What's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e(4) Black HamiltonBuhl® Primo™ Headphones\u003c\/li\u003e\n\u003cli\u003e(1) 3.5mm classroom jackbox\u003c\/li\u003e\n\u003cli\u003e(1) Sack-O-Phones™ carry bag \/ knapsack\u003c\/li\u003e\n\u003cli\u003eIndividual headphone storage bags where included by manufacturer packaging\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📦 Technical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 1em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 0.5em; border-bottom: 1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 0.5em; border-bottom: 1px solid #ddd;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eHamiltonBuhl®\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eModel Number\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eSOP-PRMB4JB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003ePortable Sack-O-Phones™ classroom listening center\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eHeadphones Included\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003e4 black Primo™ headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eJackbox Included\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eYes, 3.5mm classroom jackbox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eJackbox Capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eUp to 8 headphone connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eJackbox Controls\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eIndividual volume controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eCarry Bag\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eSack-O-Phones™ carry bag that doubles as a knapsack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eHeadphone Series\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003ePrimo™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eHeadphone Color\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eHeadphone Design\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eOver-ear stereo headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eEar Cup Style\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eNoise-reducing earcups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eEar Cushion Material\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eLeatherette\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eHeadband\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eAdjustable headband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eAudio Output\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eStereo sound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003e50Hz – 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003ePlug Type\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003e3.5mm TRS stereo plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eCable Length\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eApproximately 5 ft \/ 1.52 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eCable Type\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eDura-Cord™ braided nylon cord\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eMicrophone\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eNo microphone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eHeadphone Volume Control\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eNo in-line volume control on headphones; volume control available on jackbox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eConstruction\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eABS plastic with leatherette ear cushions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eRecommended Environment\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eClassrooms, libraries, labs, literacy centers, ESL programs, testing environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eRecommended Use\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em; border-bottom: 1px solid #eee;\"\u003eSmall-group listening, audiobooks, literacy stations, media lessons, language learning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 0.5em;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5em;\"\u003eManufacturer warranty; terms may vary by seller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e📚 Ideal For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSmall-group classroom listening centers\u003c\/li\u003e\n\u003cli\u003eLiteracy stations and reading intervention\u003c\/li\u003e\n\u003cli\u003eESL and language learning programs\u003c\/li\u003e\n\u003cli\u003eAudiobooks and guided listening activities\u003c\/li\u003e\n\u003cli\u003eLibrary and media center audio stations\u003c\/li\u003e\n\u003cli\u003eComputer labs and multimedia lessons\u003c\/li\u003e\n\u003cli\u003eTeacher-led group instruction\u003c\/li\u003e\n\u003cli\u003eTesting environments requiring listening-only headphones\u003c\/li\u003e\n\u003cli\u003eShared classroom audio programs\u003c\/li\u003e\n\u003cli\u003ePortable learning carts and traveling teachers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🎓 Why Schools Choose the HamiltonBuhl® SOP-PRMB4JB Sack-O-Phones™ Listening Center\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHamiltonBuhl® SOP-PRMB4JB Sack-O-Phones™ Listening Center\u003c\/strong\u003e gives educators a simple, portable way to support group listening activities without building a listening center from separate components. With four rugged Primo™ headphones, a classroom jackbox, and a carry bag that doubles as a knapsack, teachers can quickly set up audio learning stations wherever they are needed.\u003c\/p\u003e\n\u003cp\u003eDesigned for daily school use, this listening center supports literacy development, language learning, multimedia instruction, and focused small-group audio activities while keeping headphones and accessories organized between lessons.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeed larger listening center bundles for classrooms, libraries, or school-wide programs?\u003c\/strong\u003e Contact Learning Headphones for education quotes, bulk pricing, and school purchasing support.\u003c\/p\u003e","brand":"Hamilton Buhl","offers":[{"title":"Default Title","offer_id":44180217987108,"sku":"SOP-PRMB4JB","price":92.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0252\/9705\/9876\/files\/SOP-PRMB4JB-1.jpg?v=1778697065","url":"https:\/\/learningheadphones.com\/products\/hamiltonbuhl-classroom-listening-center-sop-prmb4jb","provider":"Learning Headphones","version":"1.0","type":"link"}