{"product_id":"alto-tx18s-900w-18-inch-powered-subwoofer-with-dsp-and-selectable-eq-1","title":"Alto TX18S | 900W 18-Inch Powered Subwoofer with DSP and Selectable EQ","description":"\u003ch2\u003ePowerful 18-Inch Subwoofer for Deep, Controlled Bass\u003c\/h2\u003e The \u003cstrong\u003eAlto TX18S\u003c\/strong\u003e delivers exceptional low-end performance and system flexibility with a DSP-enhanced 900-watt Class D amplifier and an 18-inch woofer designed to reproduce tight, deep bass across a range of live and installed audio applications. Whether you're a DJ, band, AV provider, or venue owner, the TX18S is your ideal subwoofer for clean and consistent low-frequency support. \u003ch2\u003eAlto TX18S Competitive Differences\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e18-inch high-output woofer\u003c\/strong\u003e with 3-inch voice coil for deep, responsive bass performance\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e900W Class D amplifier\u003c\/strong\u003e with built-in DSP for clean power and speaker protection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUser-selectable EQ modes\u003c\/strong\u003e (Music and Live) for fast system tuning\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSelectable low-pass filters\u003c\/strong\u003e at 80Hz, 100Hz, and 120Hz to suit any PA configuration\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePolarity Reverse switch\u003c\/strong\u003e ensures phase alignment with full-range tops\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInternally braced MDF cabinet\u003c\/strong\u003e with splatter-resistant finish and front port for maximum output and reduced turbulence\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIntegrated 36mm pole socket\u003c\/strong\u003e for use with full-range speakers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSide handles\u003c\/strong\u003e for easy transportation and setup\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003eAlto TX18S Description\u003c\/h2\u003e The \u003cstrong\u003eTX18S\u003c\/strong\u003e is Alto Professional’s largest and most capable subwoofer in the TX Series, built to deliver full-bodied low frequencies in venues ranging from houses of worship to nightclubs and live stages. Powered by a 900-watt Class D amplifier and loaded with a rugged 18-inch woofer featuring a 3-inch high-temp voice coil, the TX18S produces thunderous bass with precision and clarity.\r\nFor easy integration, the TX18S includes \u003cstrong\u003eMusic\u003c\/strong\u003e and \u003cstrong\u003eLive\u003c\/strong\u003e EQ voicings, which tailor the sub’s response to your venue or event. A \u003cstrong\u003ePolarity Reverse\u003c\/strong\u003e switch helps align phase for maximum system coherence, and \u003cstrong\u003eselectable low-pass filters\u003c\/strong\u003e let you define how the sub interacts with your top boxes. Built-in DSP protection safeguards your components, even at maximum output.\r\n\r\nThis subwoofer’s durable construction includes an \u003cstrong\u003einternally braced MDF enclosure\u003c\/strong\u003e, steel grille, and heavy-duty splatter-spray finish—making it suitable for both touring rigs and fixed installations. Dual combo inputs and XLR outputs make it easy to daisy-chain multiple speakers.\r\n\r\nWhether you're expanding your mobile rig or reinforcing a permanent install, the TX18S offers impressive punch, professional features, and unmatched value.\r\n\r\n\u003ch3\u003eTX18S Features\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e900W peak Class D power amplifier for efficient, high-output performance\u003c\/li\u003e \u003cli\u003e18” woofer with 3” voice coil for extended bass reproduction\u003c\/li\u003e \u003cli\u003eMusic and Live EQ voicing modes\u003c\/li\u003e \u003cli\u003eSelectable low-pass filter options: 80Hz, 100Hz, 120Hz\u003c\/li\u003e \u003cli\u003ePolarity reverse switch for phase alignment with full-range speakers\u003c\/li\u003e \u003cli\u003eInternally braced MDF cabinet with front port design\u003c\/li\u003e \u003cli\u003eFull metal grille and splatter-resistant finish\u003c\/li\u003e \u003cli\u003e36 mm pole socket for top speaker mounting\u003c\/li\u003e \u003cli\u003eDual combo XLR+¼\" inputs and XLR thru outputs\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eTX18S Specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Power:\u003c\/strong\u003e 900W peak @ 4Ω\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDriver:\u003c\/strong\u003e 18\" woofer with 3\" voice coil\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Response (-3 dB):\u003c\/strong\u003e 35 Hz – 100 Hz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Range (-10 dB):\u003c\/strong\u003e 27 Hz – 111 Hz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMax SPL:\u003c\/strong\u003e 137 dB @ 1m\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e 2 x XLR + ¼” combo\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e 2 x balanced XLR\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEnclosure:\u003c\/strong\u003e Internally braced MDF with ported design\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 36mm pole socket on top panel\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Splatter-resistant paint\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e Natural convection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e IEC connector\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDimensions (H x W x D):\u003c\/strong\u003e 26.7” x 20.9” x 24.7” (678.2 x 530.9 x 627.4 mm)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 93.0 lbs (42.2 kg)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cem\u003eThe TX18S is the go-to solution for musicians, DJs, and venues seeking deep, controlled bass without complexity.\u003c\/em\u003e\u003c\/p\u003e","brand":"Alto","offers":[{"title":"Default Title","offer_id":51884621136154,"sku":"115594D","price":598.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/2714\/9082\/files\/alto-tx18s--900w-18-inch-powered-subwoofer-with-dsp-and-selectable-eq_5065f148-cf21-4941-96ab-420507cf4c4c.webp?v=1774970790","url":"https:\/\/squarecable.com\/products\/alto-tx18s-900w-18-inch-powered-subwoofer-with-dsp-and-selectable-eq-1","provider":"SquareCable","version":"1.0","type":"link"}