{"product_id":"zapco-st-4b-4-ch-full-range-class-ab-amplifier","title":"Zapco ST-4B 4 Channel Full Range Class AB Amplifier","description":"\u003cp\u003eA factory head unit has limited power, so speakers run out of clean volume early. The ST-4B is an amplifier that gives your speakers or subwoofer the power they need.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e4 Channel, Class AB Full Range Amplidier\u003c\/li\u003e\n\u003cli\u003eStable into 4 ohms bridged or 2 ohms stereo load\u003c\/li\u003e\n\u003cli\u003eMOSFET power supply\u003c\/li\u003e\n\u003cli\u003eRCA and OEM speaker level input\u003c\/li\u003e\n\u003cli\u003eVariable Inputs Gain Control\u003c\/li\u003e\n\u003cli\u003eVariable FULL \/ LP \/ HP Electronic Crossover\u003c\/li\u003e\n\u003cli\u003eVariable Bass Boost\u003c\/li\u003e\n\u003cli\u003eTHD @ Rated Power \u0026lt; 0.2%\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePower @ 4 ohm: 4 x 65 watts\u003c\/li\u003e\n\u003cli\u003ePower @ 2 ohm: 4 x 90 watts\u003c\/li\u003e\n\u003cli\u003ePower @ 4 ohm Bridged: 2 x 180 watts\u003c\/li\u003e\n\u003cli\u003eSignal to Noise Ratio \u0026gt; 97dB\u003c\/li\u003e\n\u003cli\u003eChannel separation \u0026gt; 45dB\u003c\/li\u003e\n\u003cli\u003eFrequency Response 20Hz to 20,000Hz ±1dB\u003c\/li\u003e\n\u003cli\u003eInput Sensitivity .25v to 5v\u003c\/li\u003e\n\u003cli\u003eDimensions in mm: 182(W) x 52(H) x 280(L) Overall: 182(W) x 52(H) x 310(L)\u003c\/li\u003e\n\u003cli\u003eCarton size (supplier figure): 45cm x 18cm x 7cm\u003c\/li\u003e\n\u003cli\u003ePart number: ST-4B\u003c\/li\u003e\n\u003cli\u003eShipping weight: 2 kg (supplier figure)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation\u003c\/h2\u003e\u003cp\u003eWe recommend fitting by a qualified car audio installer, with correctly rated power wiring and fusing. Our workshops at Albion Park Rail (02) 4257 2636 and South Nowra (02) 4423 5254 can quote on fitting.\u003c\/p\u003e\u003ch2\u003eWarranty\u003c\/h2\u003e\u003cp\u003eIt comes with the manufacturer's warranty through the Australian distributor, plus your rights under the Australian Consumer Law.\u003c\/p\u003e\u003ch2\u003eQuestions and answers\u003c\/h2\u003e\u003ch3\u003eHow much power does the ST-4B put out?\u003c\/h3\u003e\u003cp\u003eThe supplier lists Power @ 4 ohm: 4 x 65 watts.\u003c\/p\u003e\u003ch3\u003eHow efficient is the ST-4B?\u003c\/h3\u003e\u003cp\u003eThe supplier lists Input Sensitivity .25v to 5v. Higher sensitivity means more volume from the same power.\u003c\/p\u003e\u003ch3\u003eDo I need a wiring kit for the ST-4B?\u003c\/h3\u003e\u003cp\u003eYes. An amplifier needs power, earth, remote and signal wiring sized to its current draw, with a fuse near the battery. Ask us and we will match a kit.\u003c\/p\u003e\u003ch3\u003eCan you fit the ST-4B for me?\u003c\/h3\u003e\u003cp\u003eYes. Our Albion Park Rail and South Nowra workshops can quote on supply and fitting. Call (02) 4257 2636 or (02) 4423 5254.\u003c\/p\u003e\u003ch3\u003eWhat warranty comes with the ST-4B?\u003c\/h3\u003e\u003cp\u003eIt comes with the manufacturer's warranty through the Australian distributor, plus your rights under the Australian Consumer Law.\u003c\/p\u003e","brand":"Zapco","offers":[{"title":"Default Title","offer_id":43062581559389,"sku":"ST4B","price":299.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/9528\/9437\/files\/ST-4B.webp?v=1786501517","url":"https:\/\/frankiesautoelectrics.com.au\/products\/zapco-st-4b-4-ch-full-range-class-ab-amplifier","provider":"Frankies Auto Electrics","version":"1.0","type":"link"}