{"product_id":"fosi-audio-za3","title":"Fosi Audio ZA3 Balanced Power Amplifier — TPA3255, XLR\/TRS, 155W x 2","description":"\u003cp class=\"tp-summary\"\u003eThe Fosi Audio ZA3 is a compact class-D power amplifier built on the TI TPA3255, with XLR\/1\/4-inch TRS balanced and RCA inputs and a stereo\/mono switch, rated at 155W x 2 (or 235W mono) into 4Ω on a 48V\/5A supply. It suits desktop and living-room systems with passive speakers fed by a DAC or preamp.\u003c\/p\u003e\n\u003ch2\u003eWho the Fosi Audio ZA3 is for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassive speakers:\u003c\/strong\u003e Fosi rates it at 155W x 2 into 4Ω in stereo on the 48V\/5A supply, and it supports speakers from 2Ω to 8Ω.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced sources:\u003c\/strong\u003e Combo XLR\/1\/4-inch TRS inputs and RCA inputs, chosen with a front-panel XLR\/RCA switch, connect a DAC or preamp without replugging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonoblock setups:\u003c\/strong\u003e Mono mode delivers 235W into 4Ω, so two ZA3s can drive a stereo pair as monoblocks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.1 systems:\u003c\/strong\u003e A subwoofer output feeds a powered subwoofer, and a 12V trigger input lets the ZA3 power on and off with other gear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOp-amp rolling:\u003c\/strong\u003e Five swappable op-amps can be replaced with DIP8 dual op-amps such as the Sparkos SS3602, MUSES02 or OPA2134PA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkip it if:\u003c\/strong\u003e You need Bluetooth, a built-in DAC or a phono stage; the ZA3 takes analog line inputs only, Fosi says turntables need an external preamp, and the No PSU version needs your own 24–48V DC supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFosi Audio ZA3 key specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmplifier:\u003c\/strong\u003e Texas Instruments TPA3255, Class D, stereo or mono mode\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated power:\u003c\/strong\u003e 155W x 2 (stereo) or 235W (mono) at 4Ω on 48V\/5A; 95W x 2 or 110W on 32V\/5A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e XLR\/1\/4-inch TRS combo (balanced), RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e Speaker terminals (banana plug or bare wire), subwoofer out for a powered sub\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker impedance:\u003c\/strong\u003e 2–8Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e SNR ≥106dB, THD under 0.006%, SINAD 89dB, 20Hz–20kHz (±0.1dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower and control:\u003c\/strong\u003e DC 24–48V input; 12V trigger in; volume memory\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersions:\u003c\/strong\u003e With 48V\/5A power adapter (black or orange knob), or without power supply (orange knob)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e About 184 × 155 × 51mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn the box:\u003c\/strong\u003e ZA3 amplifier and user manual, plus a 48V\/5A power adapter on the PSU versions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"tp-trust\"\u003eGenuine Fosi Audio stock. Free shipping on every order, 45-day returns.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"48V\/5A PSU \/ Orange","offer_id":46347859755143,"sku":"Fosi Audio ZA3 48V-orange--","price":159.99,"currency_code":"USD","in_stock":true},{"title":"48V\/5A PSU \/ Black","offer_id":46347859787911,"sku":"Fosi Audio ZA3 48V-black-","price":159.99,"currency_code":"USD","in_stock":true},{"title":"No PSU \/ Orange","offer_id":46347859853447,"sku":"Fosi Audio ZA3 No Power---orange","price":141.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0756\/5833\/0247\/files\/12917783360.jpg?v=1793200938","url":"https:\/\/tonepier.com\/products\/fosi-audio-za3","provider":"TonePier","version":"1.0","type":"link"}