Description
21-inch cast aluminum chassis neodymium magnet low frequency loudspeaker
- Advanced temperature control using 3-channel tuned venting system provides highly efficient cooling across the frequency band
- Voice coil typically operates at up to 80°C lower temperature than other leading drivers in this class
- Polysiloxane laminated triple suspension provides much greater stability and improved cone displacement symmetry
- Lead-out wires precision woven into suspension minimises excess motion and reduces fatigue
- Double-sided, weatherproof cone coating enhances durability
Specifications
3600W
Continuous power rating
97dB
Sensitivity
4.5in
Voice coil diameter
Nominal diameter
530mm / 21in
Power rating
1800W
Continuous power rating
3600W
Rated impedance
4Ω, 8Ω
Sensitivity
97dB
Frequency range
30-1,000Hz
Chassis type
Cast aluminium
Magnet type
Neodymium
Voice coil diameter
115mm / 4.5in
Voice coil material
Round copper
Former material
Glass fibre
Cone material
Glass loaded cellulose, water-resistant coating front & back
Surround material
Triple roll, cloth sealed
Suspension
Dual, polysiloxane-laminated
Gap height (Hg)
12mm / 0.46in
VC winding height (Hvc)
36mm / 1.42in
Parameters
Sd
1661.9cm2 / 257.9in2
Fs
30Hz
Mms
435.2g / 15.35oz
Qms
8.393
Qes
0.359
Qts
0.344
Re
5.0Ω
Vas
253.8l / 8.96ft3
BI
33.8Tm
Cms
0.065mm/N
Rms
9.77kg/s
Le (at 1kHz)
3.91mH
Xmax
15mm / 0.59in
Xmech
80mm / 1.57in
Efficiency η0
1.9%
Mounting Information
Overall diameter
541mm / 21.3in
Overall depth
250mm / 9.84in
Cut-out diameter
505mm / 19.88in
Mounting hole dimensions
8.5x10mm / 0.33x0.39in
Number of mounting holes
8
Mounting hole PCD
525-528mm / 20.61-20.79in
Flange & gasket thickness
17mm / 0.67in
Unit weight
13.8kg / 30.4lb
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