Celto Acoustique 21SW1800-8

The CELTO 21SW1800-8 is a new 21” bass driver stocked by BC Electronics. As usual with CELTO products, there has been absolutely no compromise in design, selection of materials used, manufacturing and quality control. This 21” driver features a beautifully finished powder coated die cast aluminium basket, Japanese wire 240°C voice coil, and a KEVLAR® loaded Canadian pulp paper cone with waterproof coating on both sides. This speaker has been designed to be ideal for more compact cabinet designs.   FEATURES Deep, Clean, and punchy sound Extra Long excursion design DCS (Deflective Cooling System) Water resistant KEVLAR® loaded paper cone Optimized parameters for compact cabinets  SPECIFICATIONS Nominal diameter = 460mm (18 inch) Nominal Impedance = 8Ω Power handling = 1800W RMS (AES Standard) Sensitivity = 98dB / 1W / 1m Voice coil diameter = 115mm Voice coil height Hvc = 34mm Voice coil air gap Hag = 15mm Xmax (Hvc-Hag)/2 Hag/4 = ±13.25mm Xmech (peak-peak) = 62mm Voice coil winding = 2 layers IN / OUT Voice coil material = IEC grade Copper Voice coil former = T600 fiberglass Suspension = Triple roll, impregnated fabric Spider = dual with silicon damping, NOMEX® Cone = fiber loaded, waterproof treated paper Chassis = Die Cast Aluminum Magnet = Ø250mm Y35 Ferrite  MOUNTING & SHIPPING Overall diameter = 546mm Bolt circle diameter = 514-520mm Baffle cutout diameter = 494mm Flange and gasket thickness = 14mm Overall depth = 229mm Net weight = 16kg Shipping weight = 20kg Shipping box = 560x560x300mm T&S PARAMETERS F(s) = 30.3Hz Q(ms) = 8.4 V(as) = 281ℓ M(ms) = 355g R(ms) = 8.232kg/s S(d) = 1632cm² V(d) = 2.448ℓ R(e) = 5.36Ω Q(es) = 0.402 C(ms) = 0.074mm/N Q(ts) = 0.384 L(e) 1kHz = 2.20mH BL = 30.3 n(0) = 2.00%