B&C 21DS115 - 8 Ohm

B&C 21DS115 - 21" 1700W 8 Ohm Loudspeaker

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 features a 36 mm long, 4.5 inch diameter (116mm) Copper Clad Aluminum Wire voice coil. With a 1700watt AES power rating, 99 dB sensitivity, and over 16.5mm of Xvar, this high energy subwoofer is a significant step forward from similar models in the B&C range, even approaching the performance of our 6” voice coil alternatives.

• 3400 W continuous program power capacity
• 116 mm (4.5 in) four layer aluminum voice coil
• 30 - 1000 Hz response
• 99 dB sensitivity
• 60 mm peak-to-peak excursion before damage
• Neodymium magnet allows a very high force factor and linear excursion
• Double silicone spider with optimized compliance
• Ventilated voice coil gap for reduced power compression
• Aluminium demodulating ring for very low distortion

Specifications:
 

• Nominal diameter 530 mm (21.0 in)
• Nominal impedance 8 ohms
• Minimum impedance 6.5 ohms
• Nominal power handling 1700 W
• Continuous power handling 3400 W
• Sensitivity (1W/1m) 99.0 dB
• Frequency range 30 - 1000 Hz
• Voice coil diameter 116 mm (4.5 in)
• Winding material Aluminium
• Former material Glass Fibre
• Winding depth 36 mm (1.42 in)
• Magnetic gap depth 14 mm (0.55 in)
• Flux density 0.8 T

• Surround shape Triple Roll
• Cone shape Radial
• Magnet material Neodymium Inside Slug
• Spider Double Silicone
• Pole design T-Pole
• Woofer cone treatment TWP Waterproof Both Sides
• Recommended enclosure 130.0 dm3 (4.59 ft3)
• Recommended tuning 40 Hz

• Resonance 30 Hz
• Re 5.1 ohms
• Qes 0.24
• Qms 10.0
• Qts 0.23
• Vas 269.0 dm3 (9.5 ft3)
• Sd 1680.0 cm2 (260.4 in2)
• Reference efficiency 3.0 %
• Xmax 15.0 mm
• Xvar 16.5 mm
• Mms 407 g
• Bl 40.8 Txm
• Le 4.6 mH
• EBP 125 Hz

• Overall diameter 547 mm (21.54 in)
• Bolt circle diameter 527 mm (20.7 in)
• Baffle cutout diameter 508.0 mm (20.0 in)
• Depth 255 mm (10.04 in)
• Flange and gasket thickness 13 mm (0.51 in)
• Air volume occupied by driver 15.0 dm3 (0.53 ft3)
• Net weight 14.8 kg (32.63 lb)
• Shipping weight 17.2 kg (37.92 lb)
• Shipping box 590x590x300 mm (23.1x23.1x11.8 in)
• Recone Kit RCK21DS1158