{"product_id":"questyle-sigma","title":"Questyle SIGMA","description":"\u003cp\u003eQuestyle SIGMA is a portable decoding all-in-one DAC and headphone amplifier designed to bring desktop-style audio performance to compact mobile and transportable systems.\u003c\/p\u003e\u003cp\u003eIts integrated digital decoding, Current Mode headphone amplification and balanced listening capability make it a flexible upgrade for phones, computers and wired headphones.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003ePortable desktop performance\u003c\/h3\u003e\u003cp\u003eDesigned around Questyle’s goal of delivering desktop-level audio quality in a compact chassis.\u003c\/p\u003e\u003ch3\u003eIntegrated decoding and amplification\u003c\/h3\u003e\u003cp\u003eCombines digital source decoding and headphone drive in one portable component.\u003c\/p\u003e\u003ch3\u003eCurrent Mode amplification\u003c\/h3\u003e\u003cp\u003eQuestyle’s Current Mode topology is engineered for fast transient response and low distortion.\u003c\/p\u003e\u003ch3\u003eFlexible mobile and desktop use\u003c\/h3\u003e\u003cp\u003eWorks as a transportable DAC\/headphone amplifier across compatible mobile and computer sources.\u003c\/p\u003e\n\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eTransportable high-end headphone systems\u003c\/li\u003e\n\u003cli\u003ePhone and computer lossless playback\u003c\/li\u003e\n\u003cli\u003eBalanced wired headphones and IEMs\u003c\/li\u003e\n\u003cli\u003eListeners wanting more capability than a small dongle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirectly driving passive loudspeakers\u003c\/li\u003e\n\u003cli\u003eWireless-only headphone users\u003c\/li\u003e\n\u003cli\u003eUsers seeking a tiny cable-style dongle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/DM_20260807132705_001_92875baa-9fac-465a-8168-a76359dcd80c.png?v=1786084545\" alt=\"Questyle SIGMA portable desktop-performance DAC and headphone amplifier\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/DM_20260807132713_001.png?v=1786080468\" alt=\"Questyle SIGMA digital inputs and balanced headphone connections\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/DM_20260807132719_001.png?v=1786080471\" alt=\"Questyle SIGMA transportable headphone listening system\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSIGMA is a portable DAC and headphone amplifier, not a speaker power amplifier.\u003c\/li\u003e\n\u003cli\u003eIt is intended for compatible digital sources and wired headphones or IEMs.\u003c\/li\u003e\n\u003cli\u003eConfirm cable and connector compatibility with your source and headphones before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan SIGMA drive passive speakers?\u003c\/h3\u003e\u003cp\u003eNo. It is a DAC\/headphone amplifier rather than a loudspeaker power amplifier.\u003c\/p\u003e\u003ch3\u003eCan it connect to a phone?\u003c\/h3\u003e\u003cp\u003eYes, with a compatible digital connection and cable.\u003c\/p\u003e\u003ch3\u003eCan it be used with a computer?\u003c\/h3\u003e\u003cp\u003eYes, as a compatible USB audio device.\u003c\/p\u003e\u003ch3\u003eDoes it work with balanced headphones?\u003c\/h3\u003e\u003cp\u003eUse the supported balanced headphone connection shown for the product and a correctly wired cable.\u003c\/p\u003e\u003ch3\u003eIs it a Bluetooth-only device?\u003c\/h3\u003e\u003cp\u003eNo. Its primary role is wired digital decoding and headphone amplification.\u003c\/p\u003e\u003ch3\u003eIs it smaller than a desktop DAC\/amp?\u003c\/h3\u003e\u003cp\u003eYes, it is designed as a portable decoding all-in-one.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003eMobile Headphone System\u003c\/h3\u003e\u003cp\u003eSource: Compatible phone \/ tablet\u003cbr\u003eConnection: USB digital audio\u003cbr\u003eOutput: Headphone output\u003cbr\u003eTarget: Wired IEMs or headphones\u003c\/p\u003e\u003ch3\u003eComputer Desktop System\u003c\/h3\u003e\u003cp\u003eSource: PC \/ Mac\u003cbr\u003eConnection: USB audio\u003cbr\u003eOutput: Balanced or single-ended headphone output\u003cbr\u003eTarget: Wired headphones\u003c\/p\u003e\u003ch3\u003eHiFi Line System\u003c\/h3\u003e\u003cp\u003eSource: Compatible digital source\u003cbr\u003eConnection: Digital audio\u003cbr\u003eOutput: Supported line output\u003cbr\u003eTarget: Active speakers or external amplifier\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003ePortable decoding all-in-one DAC \/ headphone amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplification\u003c\/td\u003e\n\u003ctd\u003eQuestyle Current Mode architecture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary sources\u003c\/td\u003e\n\u003ctd\u003eCompatible phones, tablets and computers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudio path\u003c\/td\u003e\n\u003ctd\u003eDigital decoding with analogue headphone amplification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeadphone use\u003c\/td\u003e\n\u003ctd\u003eWired balanced and single-ended listening\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker power amplifier\u003c\/td\u003e\n\u003ctd\u003eNot included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirmware support\u003c\/td\u003e\n\u003ctd\u003eQuestyle SIGMA firmware available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm factor\u003c\/td\u003e\n\u003ctd\u003ePortable \/ transportable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eQuestyle SIGMA\u003c\/li\u003e\n\u003cli\u003eUSB data cable\u003c\/li\u003e\n\u003cli\u003eProduct documentation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDownload Center\u003c\/h2\u003e\u003cp\u003eAccess product manuals, firmware updates, and additional support resources.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/emiuzek.com\/pages\/download\"\u003eDownload Center\u003c\/a\u003e\u003c\/p\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch2\u003e📊 Comparison: Which Portable DAC\/Amp Is Right for You?\u003c\/h2\u003e\u003cp\u003eChoose SIGMA for Questyle Current Mode sound and portable desktop-style performance; choose FiiO Q15 for its display and broader Bluetooth\/coaxial features, or iFi xDSD Gryphon for analogue sound shaping and wireless flexibility.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eQuestyle SIGMA\u003c\/th\u003e\n\u003cth\u003eFiiO Q15\u003c\/th\u003e\n\u003cth\u003eiFi xDSD Gryphon\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore buying reason\u003c\/td\u003e\n\u003ctd\u003eCurrent Mode portable reference system\u003c\/td\u003e\n\u003ctd\u003eFeature-rich digital portable DAC\/amp\u003c\/td\u003e\n\u003ctd\u003ePortable DAC\/amp with analogue sound controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum digital playback\u003c\/td\u003e\n\u003ctd\u003ePCM 768kHz \/ DSD512\u003c\/td\u003e\n\u003ctd\u003ePCM 768kHz \/ DSD512\u003c\/td\u003e\n\u003ctd\u003ePCM 768kHz with high-resolution DSD support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier approach\u003c\/td\u003e\n\u003ctd\u003eQuestyle Current Mode amplification\u003c\/td\u003e\n\u003ctd\u003eHigh-power portable headphone stage\u003c\/td\u003e\n\u003ctd\u003eiFi balanced analogue amplification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eInterface focused on portable operation\u003c\/td\u003e\n\u003ctd\u003eColour status display\u003c\/td\u003e\n\u003ctd\u003eOLED status display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003eCheck selected SIGMA operating mode\u003c\/td\u003e\n\u003ctd\u003eBluetooth decoding supported\u003c\/td\u003e\n\u003ctd\u003eHigh-resolution Bluetooth supported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital inputs\u003c\/td\u003e\n\u003ctd\u003eUSB-focused portable use\u003c\/td\u003e\n\u003ctd\u003eUSB and coaxial plus Bluetooth\u003c\/td\u003e\n\u003ctd\u003eUSB, optical\/coaxial and Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSound shaping\u003c\/td\u003e\n\u003ctd\u003ePurist Current Mode presentation\u003c\/td\u003e\n\u003ctd\u003eApp and device settings\u003c\/td\u003e\n\u003ctd\u003eXBass II and XSpace analogue controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest choice when\u003c\/td\u003e\n\u003ctd\u003eYou prioritise Questyle’s amplifier topology and sound quality\u003c\/td\u003e\n\u003ctd\u003eYou want the broadest digital feature set and display\u003c\/td\u003e\n\u003ctd\u003eYou want wireless use and adjustable bass or spatial enhancement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Questyle","offers":[{"title":"Default Title","offer_id":44872305999965,"sku":"Questyle-SIGMA","price":2798.0,"currency_code":"BRL","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/DM_20260807131811_001.png?v=1786080125","url":"https:\/\/emiuzek.com\/pt-br\/products\/questyle-sigma","provider":"EMiUZEK","version":"1.0","type":"link"}