{"product_id":"fosi-audio-ht4s","title":"Fosi Audio HT4S","description":"\u003cp\u003eFosi Audio HT4S is a compact 4.1\/5.0-channel integrated amplifier for multi-speaker, outdoor-audio and simulator systems.\u003c\/p\u003e\n\u003cp\u003eBluetooth, optical and 3.5mm inputs, five amplified channels and a switchable sub\/center channel create a flexible multi-speaker system without a full-size AV receiver.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\n\u003ch3\u003eSwitchable 4.1 or 5.0 operation\u003c\/h3\u003e\n\u003cp\u003eConfigure four main speakers plus a subwoofer channel, or use five full-range speaker channels.\u003c\/p\u003e\n\u003ch3\u003eBuilt-in multi-channel power\u003c\/h3\u003e\n\u003cp\u003eProvides four 30W channels plus a 60W sub channel in 4.1 mode, or five 30W channels in 5.0 mode.\u003c\/p\u003e\n\u003ch3\u003eDigital and wireless inputs\u003c\/h3\u003e\n\u003cp\u003eConnect optical PCM, 3.5mm analog or Bluetooth sources.\u003c\/p\u003e\n\u003ch3\u003eRemote and front-panel control\u003c\/h3\u003e\n\u003cp\u003eAdjust source, volume, tone and operation without a separate controller.\u003c\/p\u003e\n\u003ch2\u003eBest for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOutdoor and patio multi-speaker systems\u003c\/li\u003e\n\u003cli\u003eSim-racing bass-shaker installations\u003c\/li\u003e\n\u003cli\u003eCompact 4.1 or 5.0 speaker systems\u003c\/li\u003e\n\u003cli\u003eTV systems with optical PCM output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDolby or DTS surround decoding\u003c\/li\u003e\n\u003cli\u003eSystems requiring HDMI ARC\u003c\/li\u003e\n\u003cli\u003eSpeakers below the specified 4Ω minimum\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-Product_Overview.webp?v=1790751838\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-Key_Features.webp?v=1790751837\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-connectivity.webp?v=1790751836\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-Core_Technology.webp?v=1790751837\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-World_Setup.webp?v=1790751838\" alt=\"\"\u003e\n\u003c\/h2\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHT4S is a multi-channel amplifier, not an HDMI adapter or surround-sound decoder.\u003c\/li\u003e\n\u003cli\u003eSet the source to PCM stereo when using optical; encoded Dolby\/DTS signals are not supported.\u003c\/li\u003e\n\u003cli\u003eThe SUB\/CEN output changes function with the selected mode, so confirm the switch setting before connecting speakers.\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}}.emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\n\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\/FosiAudio-HT4S002.webp?v=1758599535\" alt=\"HT4S Multi-Channel Power Amplifier\" 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\/FosiAudio-HT4S003.webp?v=1758599535\" alt=\"A 5-Channel Patio Audio Solution\" 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\/FosiAudio-HT4S005.webp?v=1758599535\" alt=\"Multi-Function Integrated Amplifier\" loading=\"lazy\" style=\"display: block; width: 100%; max-width: 1100px; height: auto; margin: 0 auto;\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDoes HT4S have HDMI?\u003c\/h3\u003e\n\u003cp\u003eNo. Inputs are Bluetooth, optical and 3.5mm AUX.\u003c\/p\u003e\n\u003ch3\u003eDoes it decode Dolby or DTS?\u003c\/h3\u003e\n\u003cp\u003eNo. Use a compatible PCM signal.\u003c\/p\u003e\n\u003ch3\u003eCan it run five passive speakers?\u003c\/h3\u003e\n\u003cp\u003eYes, in 5.0 mode with compatible 4–8Ω speakers.\u003c\/p\u003e\n\u003ch3\u003eCan it power a passive subwoofer?\u003c\/h3\u003e\n\u003cp\u003eYes, in 4.1 mode through the dedicated amplified SUB\/CEN channel.\u003c\/p\u003e\n\u003ch3\u003eDoes it have a line output?\u003c\/h3\u003e\n\u003cp\u003eYes, a 3.5mm pre-out is provided.\u003c\/p\u003e\n\u003ch3\u003eCan it be used outdoors?\u003c\/h3\u003e\n\u003cp\u003eIt can power outdoor speakers, but the amplifier itself should remain protected indoors.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\n\u003ch3\u003eOptical TV system\u003c\/h3\u003e\n\u003cp\u003eSource icon: tv\u003cbr\u003eSource: TV \/ projector\u003cbr\u003eConnection: Optical PCM\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Four or five passive speakers\u003c\/p\u003e\n\u003ch3\u003eOutdoor multi-speaker system\u003c\/h3\u003e\n\u003cp\u003eSource icon: phone\u003cbr\u003eSource: Phone \/ streamer\u003cbr\u003eConnection: Bluetooth or AUX\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Outdoor passive speakers\u003c\/p\u003e\n\u003ch3\u003eSim-racing system\u003c\/h3\u003e\n\u003cp\u003eSource icon: computer\u003cbr\u003eSource: PC \/ simulator audio\u003cbr\u003eConnection: Optical, AUX or Bluetooth\u003cbr\u003eOutput connection: Speaker and SUB\/CEN outputs\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Speakers and compatible bass shaker \/ passive subwoofer\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ch3\u003eConnections\u003c\/h3\u003e\n\u003cdiv style=\"width: 100%; overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; table-layout: fixed;\"\u003e\n\u003cthead\u003e\n\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\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eInputs\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003eBluetooth; optical; 3.5mm AUX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eOutputs\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003eFive speaker channels; 3.5mm pre-out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eSpeaker impedance\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e4–8Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAmplification and physical\u003c\/h3\u003e\n\u003cdiv style=\"width: 100%; overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; table-layout: fixed;\"\u003e\n\u003cthead\u003e\n\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\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003e4.1 rated output\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e30W × 4 + 60W × 1 @ 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003e5.0 rated output\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e30W × 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eMaximum output\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e50W × 5 @ 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eSNR\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e≥88dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eTHD\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e≤0.03%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eAC input\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e110–240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eDimensions\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e6.1 × 7.2 × 2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\n\u003ch3\u003eComparison: Which Fosi Audio model is right for you?\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 680px;\"\u003e\n\u003cthead\u003e\n\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;\"\u003eHT4S\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eBT30D\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eBT30D Pro\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eSystem type\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e4.1 \/ 5.0 multi-speaker\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e2.1 stereo\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eHigher-output 2.1 stereo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eDigital input\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eOptical\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;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eAmplified outputs\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eUp to five channels\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eStereo + passive subwoofer\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eStereo + passive subwoofer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eMaximum stated output\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e50W × 5 @ 4Ω\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e50W × 2 + 100W\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e165W × 2 + 350W @ 4Ω\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;\"\u003eOutdoor, sim racing, multi-speaker\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eCompact moderate-output 2.1\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eHigher-output 2.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ US","offer_id":43722614079581,"sku":"Fosi-Audio-HT4S-Black-US","price":796.0,"currency_code":"BRL","in_stock":true},{"title":"Black \/ EU","offer_id":43722614112349,"sku":"Fosi-Audio-HT4S-Black-EU","price":715.0,"currency_code":"BRL","in_stock":true},{"title":"Black \/ UK","offer_id":43722614177885,"sku":"Fosi-Audio-HT4S-Black-UK","price":715.0,"currency_code":"BRL","in_stock":true},{"title":"Black \/ AU","offer_id":43722614145117,"sku":"Fosi-Audio-HT4S-Black-AU","price":715.0,"currency_code":"BRL","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S_8f975965-b39e-4a86-b4cb-185ee38f93c9.webp?v=1785223557","url":"https:\/\/emiuzek.com\/pt-br\/products\/fosi-audio-ht4s","provider":"EMiUZEK","version":"1.0","type":"link"}