{"product_id":"koss-qz-99-noise-reduction-headphones","title":"Koss QZ-99 Noise Reduction Headphones","description":"\u003cp\u003e\u003cstrong\u003eThe Koss QZ-99 is a passive noise-reducing over-ear stereophone built to block ambient sound and deliver focused listening with on-cup volume control and an 8-foot coiled cord.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eEngineered for environments where outside noise makes it hard to hear faint signals, the QZ-99 combines dense ear cushions and a secure headband to create passive isolation without electronics. Its simple controls — earcup volume and a stereo\/mono switch — and durable coiled cable make it a practical choice for scanning, fieldwork, or any situation that needs clear audio and hands-free adjustment.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the QZ-99 reduce background noise?\u003c\/h3\u003e\n\u003cp\u003eThe QZ-99 uses well-padded Pneumalite ear cushions and a snug headband design to physically block ambient sound rather than relying on active circuitry. This passive approach reduces distraction and improves audibility of incoming audio across a wide frequency range.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePneumalite cushions conform to the ear for a tighter seal\u003c\/li\u003e\n  \u003cli\u003eSecure, adjustable headband keeps seal consistent during movement\u003c\/li\u003e\n  \u003cli\u003eFrequency response spans 40–20,000 Hz for broad signal coverage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat controls and connections are available for field use?\u003c\/h3\u003e\n\u003cp\u003eControls are placed for quick, in-line adjustments: a volume knob located on the earcup and a switch to choose stereo or mono output. The single-entry 8-foot coiled cord allows extended reach without excess slack, useful when working with scanners or other external receivers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEar cup volume dial for fast level changes without reaching the source\u003c\/li\u003e\n  \u003cli\u003eStereo\/mono switch adds compatibility with single-channel devices\u003c\/li\u003e\n  \u003cli\u003eSingle-entry 8-foot coiled cord offers mobility and tidy cable management\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these headphones handle rugged or mobile situations?\u003c\/h3\u003e\n\u003cp\u003eYes — the QZ-99 is designed with practical field use in mind. The construction is straightforward and focused on reliable passive isolation and easy-to-reach controls, which reduces the risk of failure in active environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDurable housing and a firm headband for repeated wear\u003c\/li\u003e\n  \u003cli\u003eCoiled cable minimizes tangles while providing range\u003c\/li\u003e\n  \u003cli\u003eSimple mechanics (no active electronics) lower maintenance needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat audio performance can I expect for scanners and detectors?\u003c\/h3\u003e\n\u003cp\u003eThe QZ-99 reproduces a wide audio band from low to high frequencies so target signals from scanners or metal detectors remain intelligible. Passive isolation helps lift the useful audio above environmental noise, improving focus on faint or intermittent tones.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e40–20,000 Hz response preserves both low-frequency tones and high-frequency beeps\u003c\/li\u003e\n  \u003cli\u003ePassive isolation emphasizes intended audio over background sounds\u003c\/li\u003e\n  \u003cli\u003eStereo\/mono option accommodates single-channel signals with better clarity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Koss QZ-99 suits anyone who needs reliable, passive sound isolation without electronics — hobbyists using racing scanners or metal detectors, technicians working in noisy environments, or listeners who prefer a durable, low-maintenance over-ear headset with hand-accessible volume control. If you want focused listening, a long coiled cord, and a straightforward control layout, the QZ-99 is built for those tasks.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are the QZ-99 headphones active noise cancelling?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. They use passive noise reduction with cushioned seals and a snug headband rather than electronic noise-cancelling circuitry.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use the QZ-99 with a scanner or metal detector?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The headphones include a stereo\/mono switch and an 8-foot coiled cord, making them compatible and practical for scanners and detectors.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Koss","offers":[{"title":"Default Title","offer_id":48413416095901,"sku":"B000051SD1","price":76.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/koss-qz99-front-view-over-ear-headphones.jpg?v=1781264421","url":"https:\/\/nexoltic.com\/products\/koss-qz-99-noise-reduction-headphones","provider":"Nexoltic","version":"1.0","type":"link"}