{"product_id":"alps-21s","title":"ALPS-21S | MODE Audio 21\" 3600W High Power Line Array Subwoofer with Italian 18SOUND LF Driver \u0026 Band-Pass Design, Flyable, Birch Plywood, Black","description":"\u003cp\u003eThe MODE Audio ALPS-21S is a passive 21\" line array subwoofer featuring a 21\" Italian 18SOUND woofer that delivers 1800W RMS \/ 3600W program power at 8Ω. Its high-efficiency band-pass dual-chamber design with built-in acoustic filtering focuses low-frequency response from 35 Hz - 200 Hz, delivering high SPL output with powerful, controlled bass.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis item is available for pre-order only with an estimated lead time of at least 6–8 weeks.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe ALPS-21S is designed for both ground-stacked or flown line array configurations, supporting direct ground-stacking of up to two subwoofers. Its integrated 4-point rigging system accommodates flown installations when used with the required flying frame (sold separately). For larger configurations combining ALPS-21S subwoofers with MODE Audio \u003ca href=\"https:\/\/www.soundtown.com\/products\/alps-212\" title='MODE Audio ALPS-212 | ALPS Series Dual 12\" 3-Way 2480W Line Array Loudspeaker w\/ Italian 18SOUND + B\u0026amp;C Coaxial Transducers \u0026amp; Customizable 70°\/90°\/120° Coverage' rel=\"noopener\" target=\"_blank\"\u003eALPS-212\u003c\/a\u003e line array loudspeakers, a separate adapter frame is required (sold separately). These mounting options support the construction of high-density low-frequency arrays for large-scale events and touring applications. Four horizontal carry handles, with two on each side, make handling and positioning easier during setup and transport.\u003c\/p\u003e\n\u003cp\u003eConstructed from durable Baltic birch plywood with a rugged DURA-COAT finish, the ALPS-21S enclosure helps minimize unwanted vibrations and distortion at high output levels. Built for electronic music festivals, nightclubs, indoor staging, and large-scale events, the ALPS-21S delivers powerful, controlled low-frequency performance for demanding sound reinforcement applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePowered by Sound Town.\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch5\u003eFEATURES\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eALPS-21S PASSIVE 21\" LINE ARRAY SUBWOOFER: \u003c\/strong\u003eDelivers 1800W RMS \/ 3600W program power at 8Ω for powerful bass and high-output low-frequency reinforcement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eITALIAN WOOFER \u0026amp; BANDPASS DESIGN:\u003c\/strong\u003e Equipped with a 21\" Italian 18SOUND woofer and features a high-efficiency band-pass dual-chamber design with built-in acoustic filtering, delivering focused low-frequency response from 35 Hz - 200 Hz for outstanding SPL performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBALTIC BIRCH PLYWOOD ENCLOSURE:\u003c\/strong\u003e Constructed from high-quality Baltic birch plywood with a rugged DURA-COAT finish, the ALPS-21S enclosure helps minimize unwanted vibrations and distortion at high output levels for dependable operation in demanding environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTACKING \u0026amp; FLYING CAPABILITY:\u003c\/strong\u003e Supports direct ground-stacking of up to two ALPS-21S subwoofers. The integrated 4-point rigging system supports flown installations when used with the required flying frame (sold separately). This enables the creation of high-density low-frequency arrays for large-scale events. The ALPS-21S can also be combined with MODE Audio \u003ca href=\"https:\/\/www.soundtown.com\/products\/alps-212\" title='MODE Audio ALPS-212 | ALPS Series Dual 12\" 3-Way 2480W Line Array Loudspeaker w\/ Italian 18SOUND + B\u0026amp;C Coaxial Transducers \u0026amp; Customizable 70°\/90°\/120° Coverage' rel=\"noopener\" target=\"_blank\"\u003eALPS-212\u003c\/a\u003e line array loudspeakers using a separate adapter frame (sold separately).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCARRY HANDLES FOR TRANSPORT:\u003c\/strong\u003e Four horizontal handles (two on each side) allow for easier transportation and positioning.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eSPECIFICATIONS\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong style=\"font-size: 18px;\"\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"5\" border=\"0\" width=\"100%\" style=\"height: 529.033px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" width=\"30%\" style=\"height: 19.5938px;\"\u003eModel\u003c\/td\u003e\n\u003ctd width=\"70%\" style=\"height: 19.5938px;\"\u003eALPS-21S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eActive \/ Passive\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003ePassive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eFrequency Range\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e35 Hz - 200 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e35 Hz - 200 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eSensitivity\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e97 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eSPL Max\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e136 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eDispersion\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eOmnidirectional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eConfiguration\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e21\" passive high-power band-pass line array subwoofer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eTransducer\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eLF: 1 x 21\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eVoice Coil\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eMagnet\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eImpedance\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e8Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003ePower Handling\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e1800W RMS \/ 3600W program\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eEnclosure Material\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eHigh-grade 100% birch plywood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eMounting Hardware\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e4-point flying system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eTexture coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eGrill \u0026amp; Rigging Component\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eSteel with anti-corrosion coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eAmplifier\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eInput\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eNEUTRIK NL-4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eOutput\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eNEUTRIK NL-4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eSignal Processing\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eControl\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eIndicator\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eVoltage\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eCrossover Parts#\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eHigh Frequency Driver Parts#\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eLow Frequency Woofer Parts#\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong style=\"font-size: 18px;\"\u003e\u003cbr\u003eDimension \u0026amp; Weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"5\" border=\"0\" width=\"100%\" style=\"height: 78.3752px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" width=\"25%\" style=\"height: 19.5938px;\"\u003eProduct Width (in.)\u003c\/td\u003e\n\u003ctd width=\"25%\" style=\"height: 19.5938px;\"\u003e32.6\"\u003c\/td\u003e\n\u003ctd bgcolor=\"#F2F2F2\" width=\"25%\" style=\"height: 19.5938px;\"\u003ePackage Width (in.)\u003c\/td\u003e\n\u003ctd width=\"25%\" style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eProduct Height (in.)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e30.7\"\u003c\/td\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003ePackage Height (in.)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eProduct Depth (in.)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e24.4\"\u003c\/td\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003ePackage Depth (in.)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003eProduct Weight (lb.)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e71.6 lbs\u003c\/td\u003e\n\u003ctd bgcolor=\"#F2F2F2\" style=\"height: 19.5938px;\"\u003ePackage Weight (lb.)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e--\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong style=\"font-size: 18px;\"\u003eWarranty\/Certifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\" border=\"0\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\" bgcolor=\"#F2F2F2\"\u003eManufacturer Warranty\u003c\/td\u003e\n\u003ctd width=\"50%\"\u003e2 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"MODE Audio","offers":[{"title":"Default Title","offer_id":67874760556777,"sku":"ALPS-21S","price":2999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2486\/2094\/files\/ALPS-21S-21-Inch-3600W-Line-Array-Subwoofer-Italian-18SOUND-Flyable-Plywood-Black-Right.jpg?v=1793904092","url":"https:\/\/www.soundtown.com\/products\/alps-21s","provider":"Sound Town","version":"1.0","type":"link"}