B&C 21" RECONE KIT R21DS115-4

B&C R21DS115-4 Recone Kit For 21ds115-4 Neodymium Subwoofer Speaker 3400W 4-Ohm This next evolution subwoofer uses a new, longer, four layer aluminum voice coil. The result is more energy in the gap, higher sensitivity, lower distortion and better overall performance. The 21DS115-4 features a 40mm long, 4.5 inch diameter (116mm) Copper Clad Aluminum Wire voice coil. With a 1700watt AES power rating, 97 dB sensitivity, and over 14.0mm of Xvar, this high energy subwoofer is a significant step forward from similar models in the B&C range. B&C 21DS115-4 Specifications Lightweight but powerful FEA-optimized neodymium magnet Extremely high BL factor and Xmax for outstanding LF output 14 mm Xmax, 60 mm peak-to-peak excursion before damage 4.5" split winding copper voice coil on fiberglass former Ventilated voice coil gap reduces power compression Aluminum demodulation ring on pole piece reduces distortion Double silicone spider Nominal diameter: 530 mm (21.0 in) Nominal impedance: 4 Ohm Minimum impedance: 4.2 Ohm Nominal power handling: 1700 W Continuous power handling: 3400 W Sensitivity (1W/1m): 97.0 dB Frequency range: 33 - 1000 Hz Voice coil diameter: 116 mm (4.5 in) Winding material: Copper Former material: Glass Fibre Winding depth: 34 mm (1.34 in) Magnetic gap depth: 14 mm (0.55 in) Flux density: 1.15 T