{"product_id":"questyle-sigma","title":"Questyle SIGMA Portable Headphone Amplifier With DAC","description":"\u003cstyle\u003e\n  body {\n    font-family: Arial, sans-serif;\n    background-color: #f9f9f9;\n    color: #333;\n    margin: 20px;\n  }\n  .container {\n    max-width: 900px;\n    margin: 0 auto;\n    padding: 20px;\n    background: #fff;\n    border-radius: 10px;\n    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);\n  }\n  h2, h3 {\n    color: #0056b3;\n    margin: 10px 0;\n  }\n  p {\n    line-height: 1.75;\n    margin: 8px 0;\n  }\n  ul {\n    list-style-type: none;\n    padding: 0;\n  }\n  ul li {\n    margin: 6px 0;\n  }\n  .highlight {\n    font-weight: bold;\n    color: #0056b3;\n  }\n  .features, .technology, .specifications, .packing-list {\n    margin-top: 20px;\n  }\n  .parameters-table {\n    width: 100%;\n    border-collapse: collapse;\n    margin-top: 20px;\n  }\n  .parameters-table th, .parameters-table td {\n    padding: 8px;\n    border: 1px solid #ddd;\n    text-align: left;\n    vertical-align: top;\n  }\n  .parameters-table th {\n    background-color: #f4f4f4;\n  }\n  .note {\n    font-size: 13px;\n    color: #666;\n    margin-top: 10px;\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"container\"\u003e\n\u003ch2\u003eQuestyle SIGMA Portable DAC Headphone Amplifier\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003ePure Power. King of Detail. Redefining your audio experience with advanced GaN technology.\u003c\/em\u003e\u003c\/p\u003e\n\u003cdiv class=\"features\"\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eGallium Nitride (GaN) Power Transistors:\u003c\/span\u003e Delivers superior performance with ultra-high switching frequencies up to 1 MHz for pure sound clarity across the frequency range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eCurrent-Mode Amplifier:\u003c\/span\u003e Fully discrete, fully balanced design with a peak power output of 5W and peak current of 3A, ensuring powerful, controlled sound.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eAKM AK4493 DAC Chip:\u003c\/span\u003e Supports PCM768kHz and DSD512 decoding, offering desktop-level sound quality in a portable form.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eBluetooth 5.4 with Qualcomm Snapdragon Sound:\u003c\/span\u003e Supports SBC, aptX Adaptive, aptX HD, LDAC, and ensures high-quality wireless audio streaming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003e4300mAh Lithium Battery:\u003c\/span\u003e Supports up to 12 hours of battery life with a dual-USB smart battery management system for longer, uninterrupted listening sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eCompatibility:\u003c\/span\u003e Fully compatible with iOS, Android, Windows, macOS, and HarmonyOS, including seamless integration with Apple devices via MFi certification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eErgonomic \u0026amp; Durable Design:\u003c\/span\u003e Aerospace-grade aluminum alloy chassis, with precision CNC machining and anodized finish for durability and style.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"technology\"\u003e\n\u003ch3\u003eTechnology \u0026amp; Innovations:\u003c\/h3\u003e\n\u003cp\u003eThe Questyle SIGMA Portable DAC Headphone Amplifier utilizes cutting-edge Gallium Nitride (GaN) technology and AKM’s AK4493 DAC chip to provide extraordinary audio quality and power in a compact, portable form. The Current-Mode amplifier, with its fully discrete, fully balanced design, ensures powerful amplification with minimal distortion, offering an immersive listening experience. Combined with its advanced Bluetooth 5.4 support and high-capacity battery, SIGMA redefines what’s possible in portable high-fidelity sound.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"specifications\"\u003e\n\u003ch3\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003ctable class=\"parameters-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003eDAC Chip\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eAKM AK4493\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003ePower Transistors\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eInfineon Gallium Nitride (GaN)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003eCurrent-Mode Amplifier\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFully discrete, fully balanced with peak power of 5W and 3A current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003eBluetooth\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.4, Qualcomm Snapdragon Sound, aptX Adaptive, aptX HD, LDAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003eBattery\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e4300mAh Lithium battery, up to 12 hours battery life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003eUSB Charging\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eDual USB ports, 2A charging current, USB-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003eUSB Playback Support\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003ePCM 768kHz\/32bit, DSD512, DSD DoP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003eInput \/ Output\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e3.5mm \u0026amp; 4.4mm headphone outputs, USB input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003eSize\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e158 x 64 x 28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"highlight\"\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e400g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"packing-list\"\u003e\n\u003ch3\u003ePackage Includes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eQuestyle SIGMA Portable DAC Headphone Amplifier × 1\u003c\/li\u003e\n\u003cli\u003eUSB-C to USB-C Adapter × 1\u003c\/li\u003e\n\u003cli\u003eUSB-A to USB-C Adapter × 1\u003c\/li\u003e\n\u003cli\u003eCarrying Case × 1\u003c\/li\u003e\n\u003cli\u003eUser Manual \u0026amp; Warranty Card × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"note\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Performance may vary depending on the connected devices, audio formats, and settings. Compatibility with smartphones, tablets, and PCs is guaranteed for optimal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"detailmodule_html\"\u003e\n\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv align=\"start\" class=\"descV8-singleImage\" style=\"font-family: tahoma, arial, 'Hiragino Sans GB', 宋体, sans-serif; font-size: 12px; font-weight: 400; letter-spacing: normal; text-align: start; white-space: normal; color: rgb(0, 0, 0); overflow: hidden; width: 790px; position: relative;\"\u003e\u003cimg class=\"descV8-singleImage-image lazyload\" data-id=\"ckeditor_img74\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/S0f26a5b55efb445482bdebbd1951401b1.jpg?width=1950\u0026amp;height=1064\u0026amp;hash=3014\" style=\"border: 0px; margin: 0px auto 0px auto; display: block; max-width: 100%; min-height: 1px; width: 750px; height: auto;\" width=\"750px\"\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\" class=\"descV8-singleImage\" style=\"font-family: tahoma, arial, 'Hiragino Sans GB', 宋体, sans-serif; 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letter-spacing: normal; text-align: start; white-space: normal; color: rgb(0, 0, 0); overflow: hidden; width: 790px; position: relative;\"\u003e\u003cimg class=\"descV8-singleImage-image lazyload\" data-id=\"ckeditor_img84\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/S61ad897fb95b4ab89285057472d09f12b.jpg?width=1958\u0026amp;height=1066\u0026amp;hash=3024\" style=\"border: 0px; margin: 0px auto 0px auto; display: block; max-width: 100%; min-height: 1px; width: 750px; height: auto;\" width=\"750px\"\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\" class=\"descV8-singleImage\" style=\"font-family: tahoma, arial, 'Hiragino Sans GB', 宋体, sans-serif; font-size: 12px; font-weight: 400; letter-spacing: normal; text-align: start; white-space: normal; color: rgb(0, 0, 0); overflow: hidden; width: 790px; position: relative;\"\u003e\u003cimg class=\"descV8-singleImage-image lazyload\" data-id=\"ckeditor_img85\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/S7dc25d253c6648129bd10e62e14f8736F.jpg?width=1950\u0026amp;height=1065\u0026amp;hash=3015\" style=\"border: 0px; margin: 0px auto 0px auto; display: block; max-width: 100%; min-height: 1px; width: 750px; height: auto;\" width=\"750px\"\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\" class=\"descV8-singleImage\" style=\"font-family: tahoma, arial, 'Hiragino Sans GB', 宋体, sans-serif; font-size: 12px; font-weight: 400; letter-spacing: normal; text-align: start; white-space: normal; color: rgb(0, 0, 0); overflow: hidden; width: 790px; position: relative;\"\u003e\u003cimg class=\"descV8-singleImage-image lazyload\" data-id=\"ckeditor_img86\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/S9b72f02e8a664561a45633fa8f00f2cdn.jpg?width=1958\u0026amp;height=1074\u0026amp;hash=3032\" style=\"border: 0px; margin: 0px auto 0px auto; display: block; max-width: 100%; min-height: 1px; width: 750px; height: auto;\" width=\"750px\"\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\" class=\"descV8-singleImage\" style=\"font-family: tahoma, arial, 'Hiragino Sans GB', 宋体, sans-serif; font-size: 12px; font-weight: 400; letter-spacing: normal; text-align: start; white-space: normal; color: rgb(0, 0, 0); overflow: hidden; width: 790px; position: relative;\"\u003e\u003cimg class=\"descV8-singleImage-image lazyload\" data-id=\"ckeditor_img87\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/Seae76cc8b9dc493b939fee03fefbe6d1c.jpg\" style=\"border: 0px; margin: 0px auto 0px auto; display: block; max-width: 100%; min-height: 1px; width: 750px; height: auto;\" width=\"750px\"\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\" class=\"descV8-singleImage\" style=\"font-family: tahoma, arial, 'Hiragino Sans GB', 宋体, sans-serif; font-size: 12px; font-weight: 400; letter-spacing: normal; text-align: start; white-space: normal; color: rgb(0, 0, 0); overflow: hidden; width: 790px; position: relative;\"\u003e\u003cimg class=\"descV8-singleImage-image lazyload\" data-id=\"ckeditor_img88\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/S665e16c957044291aaad88b770cf63b6Q.jpg?width=1959\u0026amp;height=1074\u0026amp;hash=3033\" style=\"border: 0px; margin: 0px auto 0px auto; display: block; max-width: 100%; min-height: 1px; width: 750px; height: auto;\" width=\"750px\"\u003e\u003c\/div\u003e\n\u003cdiv align=\"start\" class=\"descV8-singleImage\" style=\"font-family: tahoma, arial, 'Hiragino Sans GB', 宋体, sans-serif; font-size: 12px; font-weight: 400; letter-spacing: normal; text-align: start; white-space: normal; color: rgb(0, 0, 0); overflow: hidden; width: 790px; position: relative;\"\u003e\u003cimg class=\"descV8-singleImage-image lazyload\" data-id=\"ckeditor_img89\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/S7482640cc0554186be350e54c201c0eeN.jpg?width=1953\u0026amp;height=1070\u0026amp;hash=3023\" style=\"border: 0px; margin: 0px auto 0px auto; display: block; max-width: 100%; min-height: 1px; width: 750px; height: auto;\" width=\"750px\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Questyle","offers":[{"title":"SIGMA","offer_id":47015780352239,"sku":"1005010160441354-SIGMA","price":592.87,"currency_code":"USD","in_stock":true},{"title":"SIGMA+Black leather case","offer_id":47619129311471,"sku":"1005010160441354-SIGMA","price":625.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2004\/1455\/files\/questyle-sigma-portable-headphone-amplifier-with-dac-3949151.webp?v=1761568495","url":"https:\/\/thehificat.com\/en-us\/products\/questyle-sigma","provider":"The HiFi Cat","version":"1.0","type":"link"}