{"product_id":"alpha-theta-hdj-f9-wireless-dj-headphones-with-free-extension-cable","title":"Alpha Theta HDJ-F9 Wireless DJ Headphones with FREE! Extension Cable","description":"\u003cp\u003eSecure the ultimate high-mobility performance setup with the Alpha Theta HDJ-F9 Wireless DJ Headphones Bundle, engineered explicitly for advanced electronic music production labs, campus radio stations, and university performance spaces.\u003c\/p\u003e\n\u003ccenter\u003e\n\u003cimg src=\"https:\/\/assets.alphatheta.com\/wp-content\/uploads\/2026\/09\/260421_AT_HDJ-F9_Rietta_1165_1387-scaled.webp\" width=\"700\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/assets.alphatheta.com\/wp-content\/uploads\/2026\/08\/260421_AT_HDJ-F9_01-Street-Scene_0347-1536x1536.webp\" width=\"700\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/assets.alphatheta.com\/wp-content\/uploads\/2026\/08\/260422_AT_HDJ-F9_03-Cafe-Scene_1852-1536x1536.webp\" width=\"700\"\u003e\u003c\/p\u003e\n\u003c\/center\u003e\n\u003cp\u003eThis value-driven hardware kit combines the flagship HDJ-F9 professional monitoring headset with a FREE Hosa HPE-325 Heavy-Duty 25-Foot Headphone Extension Cable - an essential hardwired redundancy piece. The headphones utilize proprietary ultra-low-latency SonicLink wireless transmission technology to sync perfectly with professional mixing consoles, completely eliminating the distracting visual and physical layout lag inherent in standard Bluetooth setups. When transitioning to deep studio editing layouts or monitoring from across a live lecture stage, the premium bundled Hosa extension cable bridges the gap, supplying pristine, interference-free stereo audio signal delivery across its rugged 25-foot structural span.\u003c\/p\u003e\n\u003ch3\u003eKey Features Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSonicLink Wireless Integration:\u003c\/strong\u003e Deploys ultra-low-latency wireless audio transmission to ensure instantaneous monitoring response for campus performance booths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Definition Drivers:\u003c\/strong\u003e Features premium 40mm dome drivers tuned to articulate deep sub-bass frequencies and crisp high-frequency transient details.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-Life Battery Performance:\u003c\/strong\u003e Delivers up to 9 hours of continuous playback via SonicLink or up to 25 hours via standard Bluetooth setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFREE! ($29.99 Value) Hosa Extension Cable:\u003c\/strong\u003e Includes a premium 25-foot extension cord with an Oxygen-Free Copper core to extend hardwired studio range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Noise Isolation:\u003c\/strong\u003e Utilizes customized ear pads and reinforced chamber housings to block ambient classroom or live venue sound bleed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Construction:\u003c\/strong\u003e Built with a rugged, flexible headband structure that passes rigorous military-grade shock and impact testing limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComfortable Ergonomic Fit:\u003c\/strong\u003e Finished with premium low-resilience polyurethane padding to prevent head fatigue during all-day lab editing sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetachable Patch Cables:\u003c\/strong\u003e Comes packed with a 1.2-meter coiled cord alongside a 1.6-meter straight cable for immediate backup options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Multi-Pairing:\u003c\/strong\u003e Syncs natively with administrative desktop computers, student tablets, and mobile training smartphones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Stereo Imaging:\u003c\/strong\u003e Separates left and right channel feeds cleanly to help music production students identify spatial mixing errors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking Cable Receptacle:\u003c\/strong\u003e Uses a secure bayonet-style connection terminal to prevent accidental cable pullout during live physical monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoldable Spatial Design:\u003c\/strong\u003e Folds into a compact, space-saving form factor for simple, low-volume storage inside school equipment lockers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSonicLink Transmitter Compatibility:\u003c\/strong\u003e Pairs smoothly with the optional HP-TX01 hardware transmitter to upgrade older analog live gear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Adapter Kit:\u003c\/strong\u003e Includes a gold-plated 1\/4-inch screw-on stereo adapter plug for plug-and-play installation into any audio panel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003c!-- Table: Expanded Technical Specifications Matrix --\u003e\n\u003ctable style=\"width:100%; border-collapse: collapse; box-shadow: 0 4px 8px rgba(0,0,0,0.1); border-radius: 8px; overflow: hidden; margin: 20px 0; line-height: 1.6; color: #2d3748; font-family: Arial, sans-serif;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #1a202c; color: #ffffff; text-align: left; font-weight: bold;\"\u003e\n      \u003cth style=\"padding: 12px 15px; width: 30%;\"\u003eHardware Specification Field\u003c\/th\u003e\n      \u003cth style=\"padding: 12px 15px; width: 70%;\"\u003eTechnical Component Data \u0026amp; Operational Boundaries Boundaries\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #ffffff;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eAcoustic Architecture\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eClosed-back, dynamic on-ear design featuring integrated bass-reflex housing chambers for tight transient kick alignment.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f7fafc;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eDriver Configuration\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eø40 mm dome-type transducers engineered with high-efficiency PEEK-PU-PEEK composite film diaphragms to minimize audio distortion.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #ffffff;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eFrequency Response\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003e5 Hz to 30,000 Hz ultra-wide acoustic range capturing sub-bass and high-frequency harmonics.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f7fafc;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eElectrical Impedance\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003e32 Ω (Ohm) nominal internal load resistance matching standard media interfaces and studio mixers.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #ffffff;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eOutput Sound Pressure\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003e106 dB maximum sensitivity level providing clean audio output inside noisy environments.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f7fafc;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eSonicLink™ Wireless Mode\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eProprietary 2.4 GHz ultra-low-latency transmission with approximately 9 ms latency and up to 49 feet unobstructed line-of-sight range.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #ffffff;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eSonicLink™ Runtime\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eApproximately 9 hours continuous operation with status LED off; approximately 7 hours runtime with status LED active.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f7fafc;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eBluetooth® Core Specs\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eBluetooth Standard Version 5.3; maximum wireless link range up to 32 feet across unobstructed clear lines.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #ffffff;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eBluetooth® Codecs \u0026amp; Profiles\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eSupported profiles: A2DP, AVRCP, HSP, HFP; supported compression audio codecs: standard SBC and high-clarity AAC.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f7fafc;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eBluetooth® Runtime\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eApproximately 25 hours continuous playback with status LED off; approximately 13 hours runtime with status LED active.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #ffffff;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003ePower Charging Boundaries\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eApproximately 2.5 hours full charge cycle from empty via USB-C; rapid 30-minute charge gives up to 2.5 hours of emergency use.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f7fafc;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eHardware Mechanical Build\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eDie-cast aluminum adjustable headband sliders combined with heavy-duty swivel hangers and flexible silicone padding.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #ffffff;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eHardware Chassis Weight\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003e10.1 oz (285 grams) maximum structural net weight excluding detached audio interconnect cables.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f7fafc;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eDetached Coiled Interconnect\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003e1.2-meter single-sided coiled cord extending up to 3.0 meters (approximately 118 inches) with an L-shaped terminal plug.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #ffffff;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eHosa HPE-325 Extension\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003eIncluded bundled value accessory; heavy-duty 25-foot (300 inches) 1\/4-inch TRS to 1\/4-inch TRS extensions cord with OFC copper shielding.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 2px solid #1a202c; background-color: #f7fafc;\"\u003e\n      \u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #2b6cb0;\"\u003eManufacturer Warranty\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 15px;\"\u003e2-year limited parts and labor hardware coverage certified for professional deployment.\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAlpha Theta HDJ-F9 Professional Wireless Monitoring Headset\u003c\/li\u003e\n\u003cli\u003eFREE Hosa HPE-325 25-Foot 1\/4\" TRS Headphone Extension Cable\u003c\/li\u003e\n\u003cli\u003e1.2 Meter Coiled Audio Cable (extends to approximately 118 inches)\u003c\/li\u003e\n\u003cli\u003e1.6 Meter Straight Studio Audio Cable (approximately 63 inches)\u003c\/li\u003e\n\u003cli\u003eThreaded 6.3 mm (1\/4\") Gold-Plated Stereo Adapter Jack\u003c\/li\u003e\n\u003cli\u003eUSB Type-C Heavy-Duty Hardware Recharging Cable\u003c\/li\u003e\n\u003cli\u003eScholastic Equipment Travel Storage Pouch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e 💡 \u003cstrong\u003eSonicLink Latency Configuration\u003c\/strong\u003e\u003cbr\u003eTo achieve true ultra-low-latency monitoring in your media lab, ensure the transmitter base is connected directly via a dedicated audio output on your mixing console rather than routing through an intermediate USB software driver pool. \u003cstrong\u003eCheck out our \u003ca href=\"https:\/\/thinkedu.com\/collections\/audio-cables\"\u003eProfessional Audio Cables Collection\u003c\/a\u003e\u003c\/strong\u003e to grab any additional interface interconnects your studio layout requires.","brand":"Hal Leonard","offers":[{"title":"Default Title","offer_id":60423891419422,"sku":"2356688_1841728","price":349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/4435\/9966\/files\/alphathetahdjf9headphones.png?v=1792667307","url":"https:\/\/thinkedu.com\/products\/alpha-theta-hdj-f9-wireless-dj-headphones-with-free-extension-cable","provider":"ThinkEDU","version":"1.0","type":"link"}