{"product_id":"questyle-sigma-pro","title":"Questyle SIGMA Pro Flagship Portable Bluetooth DAC\/Amp","description":"\u003cstyle\u003e\n  body {font-family: Arial, sans-serif; background:#f9fafc; color:#222; margin:20px;}\n  .container {max-width:940px; margin:auto; background:#fff; border-radius:12px; box-shadow:0 6px 18px rgba(0,0,0,.08); padding:28px;}\n  h2 {font-size:22px; margin:18px 0 10px; color:#0b4a82;}\n  h3 {font-size:18px; margin:16px 0 8px; color:#0b4a82;}\n  p {line-height:1.75; margin:8px 0;}\n  ul {margin:10px 0 16px 20px;}\n  li {margin:6px 0;}\n  .badges span {display:inline-block; background:#eef6ff; border:1px solid #d4e6ff; color:#0b4a82; padding:6px 11px; border-radius:999px; margin:5px 6px 0 0; font-size:13px;}\n  .specs {width:100%; border-collapse:collapse; margin-top:12px;}\n  .specs th, .specs td {border:1px solid #e6e6e6; padding:10px 12px; text-align:left; vertical-align:top;}\n  .specs th {background:#fafafa; width:280px;}\n  .note {font-size:13px; color:#666; margin-top:10px;}\n  .callout {background:#fff7e6; border:1px solid #ffe1a8; padding:10px 12px; border-radius:8px; font-size:13px; color:#7a4a00;}\n\u003c\/style\u003e\n\u003cdiv class=\"container\"\u003e\n\u003ch2\u003eQuestyle SIGMA Pro — Flagship Portable Bluetooth DAC\/Amp\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eStudio-grade performance. Portable form. No compromises.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSIGMA Pro\u003c\/strong\u003e is Questyle’s newest flagship “all-in-one” portable DAC\/headphone amplifier, engineered to bring reference monitoring performance into a truly mobile form factor. It combines \u003cstrong\u003edual-mono ESS ES9069Q DACs\u003c\/strong\u003e, Questyle’s patented \u003cstrong\u003eCurrent Mode Amplifier\u003c\/strong\u003e with fully discrete, fully balanced output stages, and an \u003cstrong\u003eXMOS XU316\u003c\/strong\u003e USB interface for master-grade decoding up to \u003cstrong\u003ePCM 768 kHz\/32-bit\u003c\/strong\u003e, \u003cstrong\u003eDSD512 (Native\/DoP)\u003c\/strong\u003e, and \u003cstrong\u003eMQA full decoding\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"badges\"\u003e\n\u003cspan\u003eDual ES9069Q (Dual-Mono)\u003c\/span\u003e \u003cspan\u003eCurrent Mode Amp ×4 (Discrete, Balanced)\u003c\/span\u003e \u003cspan\u003eXMOS XU316 USB\u003c\/span\u003e \u003cspan\u003ePCM 768\/32 • DSD512\u003c\/span\u003e \u003cspan\u003eMQA Full Decode\u003c\/span\u003e \u003cspan\u003eBluetooth 5.4 • Snapdragon Sound\u003c\/span\u003e \u003cspan\u003eaptX Adaptive\/HD • LDAC\u003c\/span\u003e \u003cspan\u003e3.5\/4.4\/6.35 HP Out\u003c\/span\u003e \u003cspan\u003e3.5 SE In • 4.4 BAL In\u003c\/span\u003e \u003cspan\u003eStereo Recording 48 kHz\/24-bit\u003c\/span\u003e \u003cspan\u003eDual USB-C (Charge+Data)\u003c\/span\u003e \u003cspan\u003e4300 mAh • 12 h\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Current Mode Amplifier + TTA:\u003c\/strong\u003e Four groups of fully discrete, fully balanced current-mode output stages under Questyle’s Three-Tier Architecture (TTA) deliver massive headroom, ultra-low distortion and speed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Mono DAC Architecture:\u003c\/strong\u003e Two ESS \u003cstrong\u003eES9069Q\u003c\/strong\u003e chips in dual-mono configuration for superior channel separation, dynamics and resolution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerious Drive Capability:\u003c\/strong\u003e Peak figures up to \u003cstrong\u003e25 Vp-p\u003c\/strong\u003e output swing, \u003cstrong\u003e\u0026gt;8 W\u003c\/strong\u003e peak power and \u003cstrong\u003e5 A\u003c\/strong\u003e instantaneous current (design headroom for difficult loads).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree Headphone Outputs:\u003c\/strong\u003e 3.5 mm SE, 4.4 mm balanced and 6.35 mm full-size for instant compatibility from IEMs to full-size headphones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Analog Line Inputs:\u003c\/strong\u003e 3.5 mm SE (nominal 1 Vrms) and 4.4 mm balanced (nominal 2 Vrms) to integrate turntables\/phono stages, mixers or other analog sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStereo Line-In Recording:\u003c\/strong\u003e Record analog inputs as 48 kHz\/24-bit digital audio over USB with simultaneous monitoring (UAC-class driverless on most OS).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo USB-C Ports:\u003c\/strong\u003e One \u003cstrong\u003eaudio\/data-only\u003c\/strong\u003e, one \u003cstrong\u003echarge-only\u003c\/strong\u003e for play-while-charging and lower phone battery drain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 5.4 with Snapdragon Sound:\u003c\/strong\u003e Supports \u003cstrong\u003eaptX Adaptive\u003c\/strong\u003e, \u003cstrong\u003eaptX HD\u003c\/strong\u003e, \u003cstrong\u003eLDAC\u003c\/strong\u003e, SBC\/LE Audio for high-quality wireless input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Battery Life:\u003c\/strong\u003e 4300 mAh pack delivers up to \u003cstrong\u003e12 hours\u003c\/strong\u003e; smart battery management keeps long sessions stable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBauhaus-inspired Chassis:\u003c\/strong\u003e Sand-blasted aviation aluminum with Kunlun glass window — minimalist, durable, and striking on any desk.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCreator-Ready Connectivity\u003c\/h3\u003e\n\u003cp\u003eOptical (Toslink) and Coaxial inputs cover legacy digital transports; USB handles modern lossless playback from phones and computers. With 3.5 mm SE and 4.4 mm balanced analog inputs, SIGMA Pro drops into studio and Hi-Fi chains seamlessly. Switch gain manually to match IEMs, studio headphones or desktop monitors via line-out.\u003c\/p\u003e\n\u003ch3\u003eWireless, Certified\u003c\/h3\u003e\n\u003cp\u003eBuilt on Qualcomm \u003cstrong\u003eSnapdragon Sound\u003c\/strong\u003e, SIGMA Pro passes both Snapdragon Sound and Sony \u003cstrong\u003eLDAC\u003c\/strong\u003e certification for robust high-quality wireless audio. It pairs broadly across ecosystems and supports modern Bluetooth codecs for both fidelity and stability.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"specs\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eQuestyle SIGMA Pro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDAC\u003c\/th\u003e\n\u003ctd\u003eDual ESS ES9069Q (dual-mono)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUSB Interface\u003c\/th\u003e\n\u003ctd\u003eXMOS XU316 • UAC 2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDigital Inputs\u003c\/th\u003e\n\u003ctd\u003eUSB (PCM 44.1–768 kHz\/32-bit; DSD Native 64\/128\/256\/512; DoP DSD64\/128\/256; MQA render \u0026amp; full decode)\u003cbr\u003eOptical (PCM 44.1–192 kHz\/24-bit) • Coaxial (PCM 44.1–192 kHz\/24-bit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAnalog Inputs\u003c\/th\u003e\n\u003ctd\u003e3.5 mm SE In (nominal 1 Vrms) • 4.4 mm BAL In (nominal 2 Vrms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone Outputs\u003c\/th\u003e\n\u003ctd\u003e6.35 mm • 3.5 mm • 4.4 mm balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Power (HP)\u003c\/th\u003e\n\u003ctd\u003e1200 mW @ 32 Ω (BAL) • 160 mW @ 300 Ω (BAL) • 40 mW @ 300 Ω (SE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003ctd\u003eTHD+N 0.0002% @ 48 kHz\/24-bit, 1 kHz sine • SNR 120 dB • FR 20 Hz–20 kHz (+0.8 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGain Control\u003c\/th\u003e\n\u003ctd\u003eLine \u0026amp; HP Out: L \/ H \/ S (Studio) • IEM Out: L \/ H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBluetooth\u003c\/th\u003e\n\u003ctd\u003ev5.4 • Snapdragon Sound • aptX Adaptive \/ aptX HD \/ LDAC \/ SBC \/ LE Audio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecording\u003c\/th\u003e\n\u003ctd\u003eStereo recording from analog inputs at 48 kHz\/24-bit with live monitoring (USB Audio Class)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUSB-C Ports\u003c\/th\u003e\n\u003ctd\u003e1× Audio\/Data (device-powered), 1× Charge (5 V \/ 2 A), supports play-while-charging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery \/ Runtime\u003c\/th\u003e\n\u003ctd\u003e4300 mAh • up to 12 h • ~3 h charge time\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions \/ Weight\u003c\/th\u003e\n\u003ctd\u003eApprox. 155.7 × 85 mm • ~330.8 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem Support\u003c\/th\u003e\n\u003ctd\u003eWindows XP–11 (UAC2), macOS, Linux, Android, HarmonyOS, iOS\/iPadOS (MFi licensed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSIGMA Pro Portable Bluetooth DAC\/Amp\u003c\/li\u003e\n\u003cli\u003eUSB-A to USB-C Adapter\u003c\/li\u003e\n\u003cli\u003eUSB-C to USB-C Cable\u003c\/li\u003e\n\u003cli\u003eWarranty Card \u0026amp; User Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"callout\" style=\"margin-top: 12px;\"\u003e\n\u003cstrong\u003eNotes:\u003c\/strong\u003e For maximum drive and stability with demanding headphones, use the 4.4 mm balanced output and appropriate gain. Use the audio\/data USB-C for playback and the charge USB-C for power; play-while-charging is supported. Recording function captures \u003cem\u003eanalog inputs\u003c\/em\u003e at 48 kHz\/24-bit via USB and requires a compatible app or DAW.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/7811\/O1CN016b46UZ27ZUm0AFcT8_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/7811\/O1CN01jTaw2A27ZUm1gAYhb_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/7811\/O1CN01jxOdhA27ZUm0XbqnB_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/7811\/O1CN01m0vS1y27ZUm0AEwur_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/7811\/O1CN01I4hhLs27ZUm1J8Tpi_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/7811\/O1CN01Qn0dXR27ZUm0v8AFD_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/7811\/O1CN010gp3fB27ZUm0AETob_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/7811\/O1CN01rqmdUT27ZUm0Xbqnr_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i1\/7811\/O1CN01KNabWS27ZUm24wkSO_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/7811\/O1CN01VkS0Uq27ZUm1J9cWK_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i2\/7811\/O1CN013WlmQV27ZUm1Hze7z_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i4\/7811\/O1CN01B5F2Pr27ZUm1Hze8B_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/7811\/O1CN01cje8MV27ZUm1HzNTt_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i2\/7811\/O1CN01gXRIiq27ZUm0AFxHq_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i2\/7811\/O1CN01TmUeo627ZUm1y6agG_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/7811\/O1CN012j2BAP27ZUm2DBC3k_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/7811\/O1CN01anxyYr27ZUm12GqDT_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/7811\/O1CN01fwsFip27ZUm1gBIS4_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i2\/7811\/O1CN01WQcxlc27ZUm24wwy5_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i2\/7811\/O1CN01FG0QFt27ZUm1OTxoJ_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i3\/7811\/O1CN01olBypA27ZUm1J7wc2_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/img.alicdn.com\/imgextra\/i2\/7811\/O1CN01cHrlYD27ZUm12F1ym_!!7811.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Questyle","offers":[{"title":"Silver with leather case","offer_id":47190551429359,"sku":"5968661649409","price":899.0,"currency_code":"USD","in_stock":true},{"title":"Black with leather case","offer_id":47190551462127,"sku":"5968661649410","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2004\/1455\/files\/questyle-sigma-pro-flagship-portable-bluetooth-dacamp-8065386.png?v=1763196695","url":"https:\/\/thehificat.com\/en-us\/products\/questyle-sigma-pro","provider":"The HiFi Cat","version":"1.0","type":"link"}