{"product_id":"fosi-gr40","title":"Fosi Audio GR40","description":"\u003cp\u003eFosi Audio GR40 is a desktop tube DAC, headphone amplifier and preamplifier for digital and Bluetooth sources.\u003c\/p\u003e\u003cp\u003eUSB, optical, coaxial and Bluetooth inputs, replaceable 5654W tubes, tone controls and RCA pre-output make it a flexible centerpiece for headphones or powered audio systems.\u003c\/p\u003e\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eMulti-input desktop DAC\u003c\/h3\u003e\u003cp\u003eAccepts USB, optical, coaxial and Bluetooth sources in one compact component.\u003c\/p\u003e\u003ch3\u003eTube analog stage\u003c\/h3\u003e\u003cp\u003eTwo replaceable 5654W tubes add tube-based amplification and visual character.\u003c\/p\u003e\u003ch3\u003eHeadphone and preamp operation\u003c\/h3\u003e\u003cp\u003eUse the front 3.5mm headphone output or feed powered speakers and power amplifiers from RCA.\u003c\/p\u003e\u003ch3\u003eHigh-resolution and codec support\u003c\/h3\u003e\u003cp\u003eSupports PCM 32-bit\/384kHz, DSD256 and Bluetooth codecs including aptX HD and aptX LL.\u003c\/p\u003e\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDesktop headphone listening\u003c\/li\u003e\n\u003cli\u003eTVs with optical audio output\u003c\/li\u003e\n\u003cli\u003eComputers using USB audio\u003c\/li\u003e\n\u003cli\u003ePowered speakers or separate power amplifiers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirectly driving passive speakers\u003c\/li\u003e\n\u003cli\u003eBalanced headphone or XLR systems\u003c\/li\u003e\n\u003cli\u003eTurntables without a phono preamplifier\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGR40 is not a speaker power amplifier; passive speakers require a separate power amplifier.\u003c\/li\u003e\n\u003cli\u003eThe RCA output is muted when headphones are connected.\u003c\/li\u003e\n\u003cli\u003eAllow the tubes to cool before removal and only use officially compatible replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cstyle\u003e@media (min-width:650px){.pbg__notes .emiuzek-product-content-images{width:calc(148.148% + 50px)!important;margin-left:calc(-48.148% - 50px)!important}}@media(max-width:649px){.pbg__notes .emiuzek-product-content-images{width:100%!important;margin-left:0!important}}.emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"margin:32px 0\"\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioGR40002.webp?v=1758425472\" alt=\"Tube Preamp\/Headphone Amp with DAC\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioGR40003.webp?v=1758425473\" alt=\"Fosi Audio GR40\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioGR40006.webp?v=1758425472\" alt=\"Fosi Audio GR40\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan GR40 power passive speakers?\u003c\/h3\u003e\u003cp\u003eNo. Connect its RCA output to a separate power amplifier or use powered speakers.\u003c\/p\u003e\u003ch3\u003eCan it connect to a TV?\u003c\/h3\u003e\u003cp\u003eYes, through a compatible optical or coaxial digital output.\u003c\/p\u003e\u003ch3\u003eDoes it include a phono input?\u003c\/h3\u003e\u003cp\u003eNo. A turntable requires a built-in or external phono preamplifier.\u003c\/p\u003e\u003ch3\u003eWhich headphones are supported?\u003c\/h3\u003e\u003cp\u003eThe official range is 32–300Ω through the 3.5mm output.\u003c\/p\u003e\u003ch3\u003eCan the tubes be replaced?\u003c\/h3\u003e\u003cp\u003eYes, but only with compatible tube types and after the unit is powered off and cool.\u003c\/p\u003e\u003ch3\u003eWhat Bluetooth codecs are supported?\u003c\/h3\u003e\u003cp\u003eSBC, AAC, aptX, aptX HD and aptX LL are listed in the manual.\u003c\/p\u003e\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003eComputer headphone system\u003c\/h3\u003e\u003cp\u003eSource icon: computer\u003cbr\u003eSource: Windows PC \/ Mac\u003cbr\u003eConnection: USB audio\u003cbr\u003eOutput connection: 3.5mm headphone output\u003cbr\u003eTarget icon: headphones\u003cbr\u003eOutput: Wired headphones\u003c\/p\u003e\u003ch3\u003eTV headphone system\u003c\/h3\u003e\u003cp\u003eSource icon: tv\u003cbr\u003eSource: TV\u003cbr\u003eConnection: Optical or coaxial PCM\u003cbr\u003eOutput connection: 3.5mm headphone output\u003cbr\u003eTarget icon: headphones\u003cbr\u003eOutput: Wired headphones\u003c\/p\u003e\u003ch3\u003ePowered speaker or amplifier system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Digital source \/ Bluetooth device\u003cbr\u003eConnection: USB, optical, coaxial or Bluetooth\u003cbr\u003eOutput connection: RCA pre-output\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Powered speakers or separate power amplifier\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eInputs and outputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eInputs\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003eUSB; optical; coaxial; Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eOutputs\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003eRCA pre-output; 3.5mm headphone output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eChannels\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eTube complement\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e2 × 5654W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eDigital and headphone performance\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eMaximum resolution\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003ePCM 32-bit \/ 384kHz; DSD256\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eBluetooth\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e5.1; SBC, AAC, aptX, aptX HD, aptX LL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eHeadphone impedance\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e32–300Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eOutput power\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e300mW @ 16Ω; 250mW @ 32Ω; 50mW @ 250Ω; 40mW @ 300Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eSNR\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e≥103dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003ePower input\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003eDC 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eComparison: Which Fosi Audio model is right for you?\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:680px\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eGR40\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eGR70\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eK7\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eProduct position\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eTube DAC \/ headphone amp \/ preamp\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eAnalog tube headphone amp \/ preamp\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eBalanced digital DAC \/ headphone amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eDigital inputs\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eUSB, optical, coaxial, Bluetooth\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eNone\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eUSB, optical, coaxial, Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eHeadphone outputs\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e3.5mm\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e3.5mm and 6.35mm\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e3.5mm and 4.4mm balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eSpeaker-system output\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eRCA pre-out\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eRCA pre-out\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eRCA line output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eBest use\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eDigital sources with tube stage\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eAnalog tube headphone system\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eHigh-output HiFi and gaming\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":43673939738717,"sku":"Fosi-Audio-GR40-Black-US","price":700.0,"currency_code":"BRL","in_stock":true},{"title":"Black \/ EU","offer_id":43673939771485,"sku":"Fosi-Audio-GR40-Black-EU","price":611.0,"currency_code":"BRL","in_stock":true},{"title":"Black \/ AU","offer_id":43673939804253,"sku":"Fosi-Audio-GR40-Black-AU","price":611.0,"currency_code":"BRL","in_stock":true},{"title":"Black \/ UK","offer_id":43673939837021,"sku":"Fosi-Audio-GR40-Black-UK","price":611.0,"currency_code":"BRL","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_GR40.webp?v=1784631194","url":"https:\/\/emiuzek.com\/pt-br\/products\/fosi-gr40","provider":"EMiUZEK","version":"1.0","type":"link"}