{"product_id":"ascendo-the24-sub-pro-passive-sealed-infrasonic-subwoofer","title":"Ascendo The24 SUB PRO Passive Sealed Infrasonic Subwoofer","description":"\u003ch2\u003eThe24 SUB PRO Passive Sealed infrasonic subwoofer (Single)\u003c\/h2\u003e\n\u003cp\u003eThe The24 SUB PRO Passive Sealed is a 24-inch passive infrasonic subwoofer in a sealed, internally braced enclosure, designed for cinemas of all sizes as well as high-end stereo systems. Priced and sold individually.\u003c\/p\u003e\n\u003c!-- split --\u003e\u003c!-- TABS --\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cdiv class=\"centredtext\"\u003e\n\u003ch3\u003eA 24-inch infrasub with 90 mm of linear stroke\u003c\/h3\u003e\n\u003cp\u003eAscendo pairs a 24-inch forward-firing woofer and dual 5-inch voice coil with 45 mm of excursion in each direction, giving 90 mm of linear stroke while the voice coil remains in a homogeneous magnetic field for linear behaviour and the lowest distortion. With its large cone area it moves around 10 litres of air per stroke, and the ultra-low resonance frequency combined with the sealed enclosure gives a group delay that Ascendo describes as several times faster than smaller 18-, 15- or 12-inch subwoofers at the same frequency.\u003c\/p\u003e\n\u003cp\u003eAs a passive design it is driven through a Neutrik NL4 MP input terminal and requires one channel of DSP and two amplifier channels. Ascendo recommends its own DSP4-6602 or DSP-4D processors with the AIA2-10K2 IS amplifier. Beyond home cinema, Ascendo notes that much of the spatial information in a fine audiophile recording sits below 30 Hz, making it equally suited to high-end stereo systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e24-inch forward-firing woofer with dual 5-inch voice coil\u003c\/li\u003e\n\u003cli\u003e90 mm linear stroke (45 mm each direction), with the voice coil remaining in a homogeneous magnetic field\u003c\/li\u003e\n\u003cli\u003eMoves approximately 10 litres of air per stroke\u003c\/li\u003e\n\u003cli\u003eSealed enclosure with ultra-low resonance frequency for fast group delay\u003c\/li\u003e\n\u003cli\u003eReproduces frequencies in the infrasonic range\u003c\/li\u003e\n\u003cli\u003eSuited to all types and sizes of cinemas as well as high-end stereo systems\u003c\/li\u003e\n\u003cli\u003eInternally braced birch ply and MDF enclosure in black structural paint, floorstanding on feet\u003c\/li\u003e\n\u003cli\u003eNeutrik NL4 MP input terminal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cstyle\u003e\n  .spec-table { width: 100%; border-collapse: collapse; border: none; font-size: 0.95em; }\n  .spec-table td { padding: 9px 14px; border: none; vertical-align: top; }\n  .spec-table tr.spec-header td { background-color: #4a4a4a; color: #ffffff; font-weight: bold; text-transform: uppercase; letter-spacing: 0.04em; }\n  .spec-table tr.spec-odd td { background-color: #ffffff; }\n  .spec-table tr.spec-even td { background-color: #d0d0d0; }\n  .spec-table td:first-child { width: 40%; font-weight: 500; }\n\u003c\/style\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eThe24 SUB PRO Passive Sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003ePack Type\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-header\"\u003e\u003ctd colspan=\"2\"\u003eGeneral\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eSpeaker Type\u003c\/td\u003e\n\u003ctd\u003e24” forward-firing woofer, with dual 5” voice coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003eXMAX\u003c\/td\u003e\n\u003ctd\u003e45 mm excursion each direction (90 mm linear), voice coil remaining in homogeneous magnetic field, linear and lowest distortion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003ePrinciple\u003c\/td\u003e\n\u003ctd\u003eSealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003ePassive | Active\u003c\/td\u003e\n\u003ctd\u003ePassive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eRecommended Amplifiers\u003c\/td\u003e\n\u003ctd\u003elCh DSP + 2 Amp. channels are required. Min. recommended amplifiers: 2 x 99 Vrms, 140 Vpk, 25 A; equivalent to 2500 W @ 4 Ω per channel, total 5000 W with correct RMS \u0026amp; peak limiter settings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003eRecommended ASCENDO Amplifiers\u003c\/td\u003e\n\u003ctd\u003eDSP4-6602, DSP-4D + AIA2-10K2 IS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-header\"\u003e\u003ctd colspan=\"2\"\u003eMeasured Data\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eSPL Peak (Peak \/ Half Space 2pi)\u003c\/td\u003e\n\u003ctd\u003e134 dB @ 40 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003eFrequency Range (measured, without ext. DSP)\u003c\/td\u003e\n\u003ctd\u003e28 Hz - 500 Hz \/ -3 dB\u003cbr\u003e20 Hz - 500 Hz \/ -15 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003ePower Handling\u003c\/td\u003e\n\u003ctd\u003e2 x 2500 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003eEfficiency\u003c\/td\u003e\n\u003ctd\u003e93 dB \/ 1 W\/m 2 pi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eImpedance\u003c\/td\u003e\n\u003ctd\u003eDual Voice Coil, 4 Ω each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003eDirectivity Horizontal x Vertical\u003c\/td\u003e\n\u003ctd\u003e360°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eMax Linear Air Volume Displacement\u003c\/td\u003e\n\u003ctd\u003e5.23 US. liq. gal. | 19.8 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-header\"\u003e\u003ctd colspan=\"2\"\u003eInput\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eInput Terminal\u003c\/td\u003e\n\u003ctd\u003eNeutrik NL4 MP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-header\"\u003e\u003ctd colspan=\"2\"\u003eDimensions \u0026amp; Weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eDimensions (W × H × D, without grille)\u003c\/td\u003e\n\u003ctd\u003e750 × 1125 × 500 mm (height without feet: 1100 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003eDimensions (W × H × D, without grille, inch)\u003c\/td\u003e\n\u003ctd\u003e29 1\/2 × 44 5\/16 × 19 11\/16 in (height without feet: 43 5\/16 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003ePacking Dimensions (W × H × D)\u003c\/td\u003e\n\u003ctd\u003e1200 × 1270 × 800 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e255.74 lbs | 116 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e284.39 lbs | 129 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-header\"\u003e\u003ctd colspan=\"2\"\u003eDesign \u0026amp; Mounting\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eInternally braced birch ply and MDF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-even\"\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eStructural paint black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"spec-odd\"\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloorstanding with feet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ascendo","offers":[{"title":"Default Title","offer_id":67919412199518,"sku":"ASC24SPPS","price":309800.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/1494\/files\/Photo-1_20THE24_SUB_PRO_PS.webp?v=1793726047","url":"https:\/\/www.ultrasound.co.za\/products\/ascendo-the24-sub-pro-passive-sealed-infrasonic-subwoofer","provider":"Ultra Sound \u0026 Vision","version":"1.0","type":"link"}