{"product_id":"fosi-audio-bt20a-pro","title":"Fosi Audio BT20A Pro","description":"\u003cp\u003eFosi Audio BT20A Pro is a compact Bluetooth stereo integrated amplifier built around the TI TPA3255 for passive speakers.\u003c\/p\u003e\u003cp\u003eIt adds RCA input, a variable 3.5 mm pre-out, bass and treble controls, replaceable op-amps and multiple power-supply options for a flexible desktop or room stereo system.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eTPA3255 stereo amplification\u003c\/h3\u003e\u003cp\u003eDelivers high-efficiency Class-D power with low specified distortion in a compact chassis.\u003c\/p\u003e\u003ch3\u003eVariable pre-out expansion\u003c\/h3\u003e\u003cp\u003eThe 3.5 mm pre-out can feed compatible powered speakers, a powered subwoofer or another amplifier.\u003c\/p\u003e\u003ch3\u003eReplaceable op-amps\u003c\/h3\u003e\u003cp\u003eSocketed NE5532 op-amps allow experienced users to tailor the analog stage with compatible DIP8 replacements.\u003c\/p\u003e\u003ch3\u003eFlexible power configurations\u003c\/h3\u003e\u003cp\u003eAvailable power-supply choices let buyers balance system output, size and cost.\u003c\/p\u003e\n\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDesktop and bookshelf passive-speaker systems\u003c\/li\u003e\n\u003cli\u003eCompact stereo systems with a powered subwoofer\u003c\/li\u003e\n\u003cli\u003eBluetooth and RCA source switching\u003c\/li\u003e\n\u003cli\u003eUsers interested in compatible op-amp rolling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSystems requiring HDMI ARC, optical or USB input\u003c\/li\u003e\n\u003cli\u003eUsers needing a headphone output\u003c\/li\u003e\n\u003cli\u003eTurntables without a phono preamplifier\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMaximum power depends on the selected supply and speaker load; choose the power-supply variant appropriate for the system.\u003c\/li\u003e\n\u003cli\u003eThe 3.5 mm connector is a pre-out, not a headphone jack.\u003c\/li\u003e\n\u003cli\u003eBluetooth takes input priority; disconnect Bluetooth when using RCA if the wired source is not heard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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;margin-right:0!important}}.pbg__notes .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\/Fosi_Audio_BT20A_PRO_002.webp?v=1758430247\" alt=\"Fosi Audio BT20A Pro TPA3255 stereo amplifier\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;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\/Fosi_Audio_BT20A_PRO_004.webp?v=1758430247\" alt=\"Fosi Audio BT20A Pro desktop listening setup\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;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\/Fosi_Audio_BT20A_PRO_007.webp?v=1758430247\" alt=\"Fosi Audio BT20A Pro stereo system connection\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan it power passive speakers?\u003c\/h3\u003e\u003cp\u003eYes. It supports 2–8 Ω passive speakers.\u003c\/p\u003e\u003ch3\u003eCan it connect to a powered subwoofer?\u003c\/h3\u003e\u003cp\u003eYes, through the variable 3.5 mm pre-out using the appropriate cable.\u003c\/p\u003e\u003ch3\u003eIs the pre-out a headphone output?\u003c\/h3\u003e\u003cp\u003eNo.\u003c\/p\u003e\u003ch3\u003eCan I connect a turntable?\u003c\/h3\u003e\u003cp\u003eYes only through a turntable with line output or an external phono stage.\u003c\/p\u003e\u003ch3\u003eDoes it support aptX?\u003c\/h3\u003e\u003cp\u003eNo. The official documentation specifies SBC\/AAC and states that aptX variants are not supported.\u003c\/p\u003e\u003ch3\u003eCan RCA and Bluetooth play simultaneously?\u003c\/h3\u003e\u003cp\u003eNo. Only one input mode is used at a time.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003ePassive speaker system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC \/ phone\u003cbr\u003eConnection: RCA or Bluetooth\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers\u003c\/p\u003e\u003ch3\u003e2.1 stereo system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC\u003cbr\u003eConnection: RCA\u003cbr\u003eOutput connection: Speaker terminals + 3.5 mm pre-out\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers + powered subwoofer\u003c\/p\u003e\n\u003ch3\u003ePre-out expansion system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC \/ phone\u003cbr\u003eConnection: RCA or Bluetooth\u003cbr\u003eOutput connection: 3.5 mm variable pre-out\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Powered speakers, powered subwoofer or downstream amplifier\u003c\/p\u003e\u003cp\u003eNote: Confirm input compatibility and begin with the volume set low.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eInputs\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;\"\u003eBluetooth 5.0\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\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;\"\u003eRCA line input\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eOutputs\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;\"\u003eStereo speaker binding posts\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\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;\"\u003e3.5 mm variable pre-out\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eAmplification\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;\"\u003eAmplifier Chip\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eTI TPA3255\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;\"\u003eMaximum Output Power\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e300 W × 2 at 4 Ω\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;\"\u003eSpeaker Impedance\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e2–8 Ω\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;\"\u003eTHD\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e≤0.005%\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≥108 dB\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;\"\u003eFrequency Response\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e20 Hz–20 kHz (±1.2 dB)\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;\"\u003eSocketed Op-Amps\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e2 × NE5532\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eConnectivity and power\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;\"\u003eBluetooth Codecs\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eSBC \/ AAC\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 Range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eup to 50 ft without obstacles\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;\"\u003eDC Input Range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e24–48 V\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 Supply Options\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e32 V \/ 5 A or 48 V \/ 5 A, depending on variant\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;\"\u003eDimensions\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eapproximately 5 × 5 × 1 in\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: BT20A or BT20A Pro?\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:520px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT20A\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT20A Pro\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAmplifier chip\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eDual TPA3116D2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eTPA3255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eMaximum output\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e100 W × 2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e300 W × 2 at 4 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003ePre-out\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eNo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e3.5 mm variable pre-out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eBest use\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSimple compact stereo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eHigher-output expandable stereo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Blue \/ 32V 5A","offer_id":43721477881949,"sku":"Fosi-Audio-BT20A-Pro-Blue-32V-5A","price":455.0,"currency_code":"BRL","in_stock":true},{"title":"Blue \/ 48V 5A","offer_id":43721477914717,"sku":"Fosi-Audio-BT20A-Pro-Blue-48V-5A","price":539.0,"currency_code":"BRL","in_stock":true},{"title":"Blue \/ 48V 5A GaN","offer_id":43721477947485,"sku":"Fosi-Audio-BT20A-Pro-Blue-48V-5A-GaN","price":539.0,"currency_code":"BRL","in_stock":true},{"title":"Blue \/ No Power Supply","offer_id":43721477980253,"sku":"Fosi-Audio-BT20A-Pro-Blue-No-Power-Supply","price":539.0,"currency_code":"BRL","in_stock":true},{"title":"Gray \/ 32V 5A","offer_id":43669225373789,"sku":"Fosi-Audio-BT20A-Pro-Gray-32V-5A","price":539.0,"currency_code":"BRL","in_stock":true},{"title":"Gray \/ 48V 5A","offer_id":43669231763549,"sku":"Fosi-Audio-BT20A-Pro-Gray-48V-5A","price":573.0,"currency_code":"BRL","in_stock":true},{"title":"Gray \/ 48V 5A GaN","offer_id":43669231796317,"sku":"Fosi-Audio-BT20A-Pro-Gray-48V-5A-GaN","price":610.0,"currency_code":"BRL","in_stock":true},{"title":"Gray \/ No Power Supply","offer_id":43669231829085,"sku":"Fosi-Audio-BT20A-Pro-Gray-No-Power-Supply","price":476.0,"currency_code":"BRL","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT20A_Pro_09d9b862-6793-4e97-b13b-60a3cdaefd39.webp?v=1785219705","url":"https:\/\/emiuzek.com\/pt-br\/products\/fosi-audio-bt20a-pro","provider":"EMiUZEK","version":"1.0","type":"link"}