{"product_id":"fosi-audio-q4","title":"Fosi Audio Q4","description":"\u003cp\u003eFosi Audio Q4 is a compact desktop DAC and headphone amplifier that converts USB, optical or coaxial digital audio to headphones and RCA analog output.\u003c\/p\u003e\u003cp\u003eVolume plus bass and treble controls, 24-bit\/192kHz S\/PDIF decoding and support for 16–200Ω headphones make it a practical entry-level computer or TV audio upgrade.\u003c\/p\u003e\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eThree digital inputs\u003c\/h3\u003e\u003cp\u003eUSB, optical and coaxial connections support computers, TVs, consoles and digital transports.\u003c\/p\u003e\u003ch3\u003eHeadphone and RCA outputs\u003c\/h3\u003e\u003cp\u003eListen through 3.5mm headphones or feed an amplifier and powered speakers through RCA.\u003c\/p\u003e\u003ch3\u003eDirect tone adjustment\u003c\/h3\u003e\u003cp\u003eFront bass and treble controls allow quick system tuning.\u003c\/p\u003e\u003ch3\u003eCompact plug-and-play control\u003c\/h3\u003e\u003cp\u003eInput selection and analog volume are integrated into a small desktop chassis.\u003c\/p\u003e\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEntry-level computer audio\u003c\/li\u003e\n\u003cli\u003eTV optical PCM to headphones or stereo system\u003c\/li\u003e\n\u003cli\u003eDesktop headphones and powered speakers\u003c\/li\u003e\n\u003cli\u003eUsers wanting physical bass and treble controls\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDolby or DTS bitstream decoding\u003c\/li\u003e\n\u003cli\u003eBalanced headphone systems\u003c\/li\u003e\n\u003cli\u003eHeadphones above the specified 200Ω range\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"grid-column:1 \/ -1;width:100%;max-width:1100px;margin:8px auto 32px;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioQ4-002.webp?v=1758521328\" alt=\"Fosi Audio Q4 desktop DAC and headphone amplifier core audio benefits\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioQ4-005.webp?v=1758521328\" alt=\"Fosi Audio Q4 USB, optical, coaxial, RCA and headphone connections\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioQ4-003.webp?v=1758521328\" alt=\"Fosi Audio Q4 computer, TV, headphone and stereo system scenarios\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\n\u003c\/div\u003e\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSet TVs and consoles to two-channel PCM; Q4 does not decode Dolby or DTS.\u003c\/li\u003e\n\u003cli\u003eInserting headphones can mute the RCA output.\u003c\/li\u003e\n\u003cli\u003eUSB audio reaches 24-bit\/96kHz; optical and coaxial reach 24-bit\/192kHz.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan Q4 connect to a TV?\u003c\/h3\u003e\u003cp\u003eYes, through optical or coaxial when the TV is set to PCM stereo.\u003c\/p\u003e\u003ch3\u003eDoes it decode Dolby or DTS?\u003c\/h3\u003e\u003cp\u003eNo. Use PCM output to avoid noise or silence.\u003c\/p\u003e\u003ch3\u003eCan it drive passive speakers?\u003c\/h3\u003e\u003cp\u003eNo. RCA must feed an amplifier, or use powered speakers.\u003c\/p\u003e\u003ch3\u003eCan I use headphones and RCA together?\u003c\/h3\u003e\u003cp\u003eThe headphone connection can mute RCA output, so treat them as alternate outputs.\u003c\/p\u003e\u003ch3\u003eDoes USB need a driver?\u003c\/h3\u003e\u003cp\u003eIt is generally plug-and-play on listed systems; select Fosi Audio Q4 as the playback device.\u003c\/p\u003e\u003ch3\u003eCan I connect an analog source?\u003c\/h3\u003e\u003cp\u003eNo. All Q4 inputs are digital.\u003c\/p\u003e\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003eComputer headphones\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e PC or Mac\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e USB audio\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e 3.5mm headphone\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e 16–200Ω headphones\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Select Q4 as the playback device.\u003c\/p\u003e\u003ch3\u003eTV headphones\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Television\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Optical PCM\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e 3.5mm headphone\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Wired headphones\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Disable Dolby and DTS output.\u003c\/p\u003e\u003ch3\u003eStereo system\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Computer, TV or transport\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e USB, optical or coaxial\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e RCA\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Amplifier or powered speakers\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Use Q4 volume and tone controls.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eAudio performance\u003c\/h3\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\u003eUSB sampling\u003c\/td\u003e\n\u003ctd\u003eUp to 24-bit \/ 96kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical \/ coaxial\u003c\/td\u003e\n\u003ctd\u003eUp to 24-bit \/ 192kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeadphone output\u003c\/td\u003e\n\u003ctd\u003e100mW at 32Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeadphone impedance\u003c\/td\u003e\n\u003ctd\u003e16–200Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD \/ SNR\u003c\/td\u003e\n\u003ctd\u003e≤0.01% \/ ≥105dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRCA output level\u003c\/td\u003e\n\u003ctd\u003e2.3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eConnections and physical\u003c\/h3\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\u003eInputs\u003c\/td\u003e\n\u003ctd\u003eUSB, optical, coaxial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e3.5mm headphone, RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChipset\u003c\/td\u003e\n\u003ctd\u003eSA9023 + CS8412 + 97220 + NE5532\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e73.5 × 98 × 33mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e251g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eRecommended System Setup\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSetup\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eComputer headphones\u003c\/td\u003e\n\u003ctd\u003eComputer → USB → Q4 → Headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTV system\u003c\/td\u003e\n\u003ctd\u003eTV optical PCM → Q4 → Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePowered speakers\u003c\/td\u003e\n\u003ctd\u003eDigital source → Q4 RCA → Powered speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eFosi Audio product comparison\u003c\/h3\u003e\u003cp\u003eCompare the models by the differences that most affect system matching and everyday use.\u003c\/p\u003e\u003cdiv style=\"max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"min-width:860px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"min-width:150px;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"min-width:190px;\"\u003eQ4\u003c\/th\u003e\n\u003cth style=\"min-width:190px;\"\u003eK5 Pro\u003c\/th\u003e\n\u003cth style=\"min-width:190px;\"\u003eSK02\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct position\u003c\/th\u003e\n\u003ctd\u003eEntry desktop DAC\/amp\u003c\/td\u003e\n\u003ctd\u003eGaming DAC\/amp\u003c\/td\u003e\n\u003ctd\u003eHigher-performance desktop DAC\/amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUSB maximum\u003c\/th\u003e\n\u003ctd\u003e24-bit \/ 96kHz\u003c\/td\u003e\n\u003ctd\u003e24-bit \/ 96kHz\u003c\/td\u003e\n\u003ctd\u003e32-bit \/ 384kHz, DSD256\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOther digital inputs\u003c\/th\u003e\n\u003ctd\u003eOptical, coaxial\u003c\/td\u003e\n\u003ctd\u003eOptical, coaxial\u003c\/td\u003e\n\u003ctd\u003eOptical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone outputs\u003c\/th\u003e\n\u003ctd\u003e3.5mm\u003c\/td\u003e\n\u003ctd\u003e3.5mm\u003c\/td\u003e\n\u003ctd\u003e3.5mm, 4.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum headphone power\u003c\/th\u003e\n\u003ctd\u003e100mW at 32Ω\u003c\/td\u003e\n\u003ctd\u003e500mW at 32Ω\u003c\/td\u003e\n\u003ctd\u003e755mW at 32Ω via 4.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMicrophone input\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRCA output\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTone controls\u003c\/th\u003e\n\u003ctd\u003eBass, treble\u003c\/td\u003e\n\u003ctd\u003eBass, treble\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBalanced output\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003e4.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBest use\u003c\/th\u003e\n\u003ctd\u003eSimple PC\/TV audio\u003c\/td\u003e\n\u003ctd\u003eGaming with microphone\u003c\/td\u003e\n\u003ctd\u003eHi-res desktop headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ US","offer_id":43722576920669,"sku":"Fosi-Audio-Q4-Black-US","price":234.0,"currency_code":"BRL","in_stock":true},{"title":"Black \/ EU","offer_id":43722576953437,"sku":"Fosi-Audio-Q4-Black-EU","price":356.0,"currency_code":"BRL","in_stock":true},{"title":"Black \/ AU","offer_id":43722576986205,"sku":"Fosi-Audio-Q4-Black-AU","price":356.0,"currency_code":"BRL","in_stock":true},{"title":"Black \/ UK","offer_id":43722577018973,"sku":"Fosi-Audio-Q4-Black-UK","price":356.0,"currency_code":"BRL","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_Q4_d1913db8-b72e-4d8d-be4d-df387c7fb9c9.webp?v=1785380488","url":"https:\/\/emiuzek.com\/pt-br\/products\/fosi-audio-q4","provider":"EMiUZEK","version":"1.0","type":"link"}