{"product_id":"celto-21sw2000-8-21-loose-speaker-2000w","title":"Celto 21\" Loose Speaker 2000W [21SW2000-8]","description":"\u003ch2\u003eCelto 21\" Loose Speaker 2000W [21SW2000-8]\u003c\/h2\u003e\n\u003cp\u003eThe CELTO 21SW2000-8 is a high-power 21-inch bass speaker driver designed for professional sound reinforcement applications requiring deep, clean and punchy low-frequency reproduction. Featuring a 2000W RMS (AES) power handling capacity and an 8-ohm nominal impedance, this driver is suited to high-output subwoofer cabinet designs. Its extra-long excursion construction, 4.5-inch voice coil and optimised parameters make it particularly suitable for compact bass enclosure applications where powerful low-frequency performance is required. The driver combines carefully selected materials with a robust construction intended for demanding professional audio environments.\u003c\/p\u003e\n\u003cp\u003eBuilt around a powder-coated die-cast aluminium chassis, the CELTO 21SW2000-8 features a KEVLAR®-loaded Canadian pulp paper cone\u003cspan\u003e with a waterproof coating on both sides. Its 240°C thermal-class copper voice coil, DUPONT® GB fibreglass former and DCS (Deflective Cooling System) contribute to its thermal management design. The dual NOMEX® spider with silicone damping and triple-roll impregnated fabric suspension support the driver's extended-excursion operation. With a sensitivity rating of 98 dB (1W\/1m), a resonant frequency of 30.3 Hz and a large 1632 cm² effective cone area, this driver provides a technical foundation for professional bass enclosure projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2000W RMS (AES) power handling for professional high-power bass applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e21-inch bass driver designed for low-frequency reproduction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e8-ohm nominal impedance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e4.5-inch (115 mm) voice coil with 240°C thermal-class copper winding\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExtra-long excursion design with ±13.25 mm calculated Xmax\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDCS (Deflective Cooling System) for voice coil cooling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eKEVLAR®-loaded Canadian pulp paper cone with waterproof coating on both sides\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePowder-coated die-cast aluminium chassis for structural support\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDual NOMEX® spider with silicone damping\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTriple-roll impregnated fabric suspension\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e250 mm Y35 ferrite magnet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOptimised parameters for compact bass cabinet designs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e98 dB sensitivity at 1W\/1m\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eGeneral\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eBrand: CELTO\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eModel: 21SW2000-8\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Type: Professional Bass Speaker Driver\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNominal Size: 21 inches (subject to confirmation of conflicting nominal diameter specification)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNominal Impedance: 8 Ω\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePower Handling: 2000W RMS (AES)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSensitivity: 98 dB (1W\/1m)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eVoice Coil \u0026amp; Motor\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eVoice Coil Diameter: 115 mm (4.5 inches)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVoice Coil Height (Hvc): 34 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVoice Coil Air Gap (Hag): 15 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCalculated Xmax: ±13.25 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMechanical Excursion (Peak-to-Peak): 62 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVoice Coil Winding: 2 layers, inside\/outside\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVoice Coil Material: 240°C thermal-class copper\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVoice Coil Former: DUPONT® GB fibreglass\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMagnet: Ø250 mm Y35 ferrite\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCone \u0026amp; Suspension\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCone Material: KEVLAR®-loaded, waterproof-treated pulp paper\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eChassis Material: Die-cast aluminium\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuspension: Triple-roll impregnated fabric\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpider: Dual NOMEX® with silicone damping\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCooling System: DCS (Deflective Cooling System)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eThiele-Small Parameters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eResonant Frequency (Fs): 30.3 Hz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMechanical Q Factor (Qms): 8.4\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEquivalent Compliance Volume (Vas): 281 L\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMoving Mass (Mms): 355 g\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMechanical Resistance (Rms): 8.232 kg\/s\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEffective Cone Area (Sd): 1632 cm²\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVolume Displacement (Vd): 2.448 L\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDC Resistance (Re): 5.36 Ω\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eElectrical Q Factor (Qes): 0.402\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMechanical Compliance (Cms): 0.074 mm\/N\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTotal Q Factor (Qts): 0.384\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVoice Coil Inductance (Le at 1 kHz): 2.20 mH\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eForce Factor (BL): 30.3 (unit not specified)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReference Efficiency (η₀): 2.00%\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eDimensions \u0026amp; Weight\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eProduct\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOverall Diameter: 54.6 cm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOverall Depth: 22.9 cm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Dimensions (L × W × H): 54.6 × 54.6 × 22.9 cm (overall circular diameter used for length and width)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNet Weight: 16 kg\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMounting Dimensions\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eBolt Circle Diameter: 51.4–52.0 cm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBaffle Cutout Diameter: 49.4 cm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFlange and Gasket Thickness: 1.4 cm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePackaging\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ePackaged Dimensions (L × W × H): 56 × 56 × 30 cm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eShipping Weight: 20 kg\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eWhat’s in the Box?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × CELTO 21SW2000-8 Bass Speaker Driver\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eWarranty\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e12 Months \u003c\/p\u003e","brand":"Viva Afrika Sound \u0026amp; Light","offers":[{"title":"Default Title","offer_id":67665361862723,"sku":"2014796000000","price":5800.0,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0042\/4801\/0819\/files\/2014796000000celto-21-loose-speaker-2000w-21sw2000-8-4902531.png?v=1792122066","url":"https:\/\/www.fastrak.co.za\/products\/celto-21sw2000-8-21-loose-speaker-2000w","provider":"Fastrak","version":"1.0","type":"link"}