21DS115
This next evolution subwoofer uses a new, longer, four layer aluminum voice coil. The result is more energy in the gap, less heat, higher sensitivity, higher power handling, 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 17 mm 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.
Features
3400 W continuous program power capacity
116 mm (4.5 in) four layer aluminum voice coil
30 - 1000 Hz response
99 dB sensitivity
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 in)
Nominal Impedance
4 Ω
Minimum Impedance
3.1 Ω
Nominal Power Handling
1700 W
Continuous Power Handling
3400 W
Sensitivity
99 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
Woofer Cone Treatment
TWP Waterproof Both Sides
Parameters
Fs
30 Hz
Re
2.2 Ω
Qes
0.2
Qms
11
Qts
0.21
Vas
274 dm³ (9.68 ft³)
Sd
1680 cm² (260.4 sq²)
η0
3.4 %
Xmax
15 mm
Xvar
17 mm
Mms
412 g
Bl
28.8 Tm
Le
2.4 mH
EBP
150 Hz
Design
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 dm³ (4.59 ft³)
Recommended Tuning
40 Hz
Mounting and Shipping Info
Overall Diameter
547 mm (21.54 in)
Bolt Circle Diameter
527 mm (20.7 in)
Baffle Cutout Diameter
508 mm (20 in)
Depth
255 mm (10.04 in)
Flange and Gasket Thickness
13 mm (0.51 in)
Air Volume Occupied by Driver
15 dm³ (0.53 ft³)
Net Weight
14.7 kg (32.41 lb)
Shipping Units
1 pcs
Shipping Weight
17 kg (37.48 lb)
Shipping Box
570x570x320 mm (22.44x22.44x12.60 in)
Service Kit
lf Recone Kit
RCK21DS1154
Cone
Basket
Centering Shims