{"product_id":"zapco-st-501d-sq-mini-sub-amp-1-channel-class-d-mono-subwoofer-amplifier-copy","title":"Zapco ST-104D SQ III Amp 4-Channel Class D Compact Amplifier 4x100w RMS","description":"\u003cp\u003e\u003cstrong\u003eThe ST-III amps were the first to get the new Studio brushed aluminum finned chassis\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe new Class D Studio MINI Amplifiers. Over the last couple of years Zapco has introduced more than our pure high end SQ Competition amps. We have also introduced a line of great sounding amps in an affordable price range called the Studio series. The Studio D amps are full range Class D amps with great sound, a compact chassis, and more crystal clear power than the competition. Thanks to a brand new technology, we are able use the NXP Class D solution to get amazing power and performance in a incredibly compact chassis with over 90% efficiency. And this diminutive little beast has all the features of the larger amps... and optional HD Bluetooth streaming! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe HD Bluetooth Module (optional) is a Qualcomm CSR8675 premium-tier single-chip solution with 120 MHz DSP, delivering high-quality wireless audio performance over Bluetooth and aptX HD making it an ideal choice for premium audio products. What makes the MINI amps truly amazing is their extremely small sizes. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOptional HD Bluetooth\u003c\/li\u003e\n\u003cli\u003e4-Channel, Full Range, Class D\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRCA and Speaker Level inputs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVariable input gain control\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVariable electronic crossover\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVariable bass boost control\u003c\/li\u003e\n\u003cli\u003ePower @ 4Ω: 4 x 100 watts RMS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD @ Rated Power \u0026lt; 0.5%THD\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower @ 2Ω: 4 x 150 watts RMS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower Bridged @ 4Ω: 2 x 300 W RMS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSignal to Noise Ratio \u0026gt; 90dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD + Noise \u0026lt; 0.1%\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFrequency Response 15Hz to 30KHz ±1dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInput Sensitivity .35v to 9v (Low)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eNet Dimensions (mm): 124(W) x 50(H) x 213(L)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOverall Dimensions (mm): 124(W) x 50(H) x 242(L)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003cspan\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" fill=\"none\" viewbox=\"0 0 14 8\" height=\"8\" width=\"14\"\u003e\u003cpath stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.3\" stroke=\"var(--color-heading)\" d=\"M13 6.81818L7 0.818176L1 6.81818\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003cslot pseudo=\"details-content\" id=\"details-content\"\u003e\u003c\/slot\u003e\u003c\/p\u003e\n\u003cdiv id=\"ProductAccordion-collapsible_tab_CHMwtd-template--27198703468810__main-product\" class=\"collapsible__content accordion__content rte\"\u003e\n\u003cul\u003e\n\u003cli\u003e4-Channel, Full Range, Class D\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRCA and Speaker Level inputs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVariable input gain control\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVariable electronic crossover\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVariable bass boost control\u003c\/li\u003e\n\u003cli\u003ePower @ 4Ω: 4 x 100 watts RMS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD @ Rated Power \u0026lt; 0.5%THD\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower @ 2Ω: 4 x 150 watts RMS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower Bridged @ 4Ω: 2 x 300 W RMS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSignal to Noise Ratio \u0026gt; 90dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD + Noise \u0026lt; 0.1%\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFrequency Response 15Hz to 30KHz ±1dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInput Sensitivity .35v to 9v (Low)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eNet Dimensions (mm): 124(W) x 50(H) x 213(L)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOverall Dimensions (mm): 124(W) x 50(H) x 242(L)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Zapco","offers":[{"title":"Default Title","offer_id":52840530379018,"sku":"ST-104D SQ III","price":229.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0930\/4578\/4842\/files\/ST-104DSQIII-1.webp?v=1775739190","url":"https:\/\/audiovisualworld.co.uk\/products\/zapco-st-501d-sq-mini-sub-amp-1-channel-class-d-mono-subwoofer-amplifier-copy","provider":"Audio Visual World","version":"1.0","type":"link"}