{"product_id":"audiocenter-s-active-subwoofers","title":"AudioCenter S Active Subwoofers — Select Model","description":"\u003ch2\u003eAudioCenter S Active DSP Subwoofers\u003c\/h2\u003e\u003cp\u003eThe AudioCenter S active subwoofer family provides self-powered low-frequency reinforcement for professional PA, DJs, live sound, rental, event production, houses of worship and fixed installations. Choose the S3118A single-18-inch model or the S3218A dual-18-inch model above; the selected option updates the exact product image, SKU, price and detailed specifications.\u003c\/p\u003e\u003cp\u003eBoth models use customized 18-inch drivers with 4-inch voice coils, Class-D amplification and 48 kHz DSP. Three selectable low-pass presets—80 Hz, 100 Hz and 120 Hz—make it easier to match the subwoofer to different top cabinets, venues and music styles. A rear-panel phase switch helps with system integration, while XLR input and output allow the signal to be linked through to additional powered loudspeakers.\u003c\/p\u003e\u003ch3\u003eChoose the output level\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eS3118A:\u003c\/strong\u003e single 18-inch driver, 1,000 watts RMS \/ 2,000 watts peak, 30 Hz–140 Hz published response and 134 dB peak calculated SPL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS3218A:\u003c\/strong\u003e dual 18-inch drivers, 2,000 watts RMS \/ 4,000 watts peak, 26 Hz–135 Hz published response and 140 dB peak calculated SPL.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCNC-machined plywood construction, fan-assisted cooling, side handles, iron grilles, M20 pole mounts and extensive amplifier protection support professional deployment. See the selected model details below for exact dimensions, weight and electrical specifications.\u003c\/p\u003e","brand":"AudioCenter","offers":[{"title":"S3118A — Single 18 Inch","offer_id":51272498413801,"sku":"S3118A","price":909.0,"currency_code":"USD","in_stock":true},{"title":"S3218A — Dual 18 Inch","offer_id":51707349762281,"sku":"S3218A","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0311\/8134\/0811\/files\/S3118A-1000x750.webp?v=1781525739","url":"https:\/\/smscaraudio.com\/products\/audiocenter-s-active-subwoofers","provider":"SMS Car Audio","version":"1.0","type":"link"}