Features
3400 W continuous program power capacity
116 mm (4.5 in) split winding copper voice coil
33 - 1000 Hz response
97 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 in)
Nominal Impedance
4 Ω
Minimum Impedance
4.2 Ω
Nominal Power Handling
1700 W
Continuous Power Handling
3400 W
Sensitivity
97 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
Woofer Cone Treatment
TWP Waterproof Both Sides
Parameters
Fs
33 Hz
Re
3.6 Ω
Qes
0.37
Qms
7.7
Qts
0.36
Vas
278 dm³ (9.7 ft³)
Sd
1680 cm² (260.4 sq²)
η0
2.6 %
Xmax
14 mm
Xvar
15 mm
Mms
335 g
Bl
24.8 Tm
Le
1.7 mH
EBP
89 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
250 dm³ (8.83 ft³)
Recommended Tuning
32 Hz
Mounting and Shipping Info
Overall Diameter
547 mm (21.5 in)
Bolt Circle Diameter
527 mm (20.7 in)
Baffle Cutout Diameter
503 mm (19.8 in)
Depth
249 mm (9.8 in)
Flange and Gasket Thickness
14 mm (0.53 in)
Air Volume Occupied by Driver
15 dm³ (0.53 ft³)
Net Weight
14 kg (30.8 lb)
Shipping Units
1 pcs
Shipping Weight
16.3 kg (35.94 lb)
Shipping Box
570x570x320 mm (22.44x22.44x12.60 in)
Service Kit
lf Recone Kit
RCK21SW1154
Cone
Basket
Centering Shims