Blastking PROFILE21N 21 Inch High-Performance Neodymium Woofer 8 Ohm 4000W Program

Sold Individually The Blastking PROFILE21N is a 21 inch high-performance neodymium woofer designed for low-frequency professional audio applications. It features 8 ohm impedance, 2000 watts RMS power handling, 4000 watts program power, and 96 dB sensitivity, delivering strong output in a lightweight woofer design. Built with a 4.9 inch fiberglass voice coil and a lightweight neodymium magnet, the PROFILE21N is specified for a frequency range of 30 Hz to 1000 Hz. Its 21 inch / 530 mm nominal basket diameter, 494 mm cut-out, and 245 mm depth make it a practical option for professional speaker builds and replacement applications where strong low-frequency performance and reduced weight are important. Features 21 inch high-performance neodymium woofer Lightweight neodymium magnet 8 ohm impedance 2000W RMS power handling 4000W program power 96 dB high sensitivity 4.9 inch fiberglass voice coil Frequency range: 30 Hz to 1000 Hz Low-frequency woofer design PROFILE N-SERIES Specs Model: PROFILE21N Description: High-Performance Neodymium Woofer Nominal Basket Diameter: 530 mm / 21 inch Rated Impedance: 8 ohm Rated Power Handling: 2000 Watts Program Power: 4000 Watts Sensitivity: 96 dB Frequency Range: 30 Hz - 1000 Hz Magnet: 778 g / 27.44 oz Magnet Dimensions: 123 x 45 x 10 mm / 4.8 x 1.8 x 0.4 inch Minimum Impedance: 5.4 ohm Voice Coil Diameter: 125 mm / 4.9 inch Voice Coil Material: Fiberglass Voice Coil Length: 35 mm / 1.38 inch Number of Layers: 2 Kind of Layers: inside/outside Top Plate Thickness: 16 mm / 0.63 inch Resonance Frequency (Fs): 23.86 Hz DC Resistance (Re): 5.4 ohm Mechanical Factor (Qms): 12.89 Electrical Factor (Qes): 0.413 Total Factor (Qts): 0.4 BL Factor (BL): 27.66 T-m Effective Moving Mass (Mms): 390.54 gr Equivalent Cas Air Load (Vas): 448.98 liters Effective Piston Area (Sd): 1.680E-1 m² Maximum Linear Excursion (Xmax): 13.5 mm Overall Diameter: 552 mm / 21.73 inch Bolt Circle Diameter: 519 mm / 20.43 inch Bolt Hole Diameter: 8 mm / 0.315 inch Front Mount Baffle Cut-Out: 494 mm / 19.45 inch Rear Mount Baffle Cut-Out: 494 mm / 19.45 inch Depth: 245 mm / 9.65 inch Net Weight: 11 kg / 24.2 lbs Shipping Weight: 13 kg / 28.66 lbs Dimensions (W x D x H): 580 x 575 x 285 mm / 22.8 x 22.6 x 11.2 inch View PROFILE21N Datasheet