Celestion NTR21
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Rigid lightweight carbon fibre loaded cone
Vented magnet assembly for more efficient cooling
Compact high flux Dual Magnet Motor design
Optimised double suspension
Specifications
1600W
Nominal Power Rating
98dB
Sensitivity
5in
Voice coil diameter
Nominal Diameter530mm/21in
Nominal Power Rating1600W
Continuous Power Rating3200W
Sensitivity98dB
Rated Impedance8Ω
Frequency Range30Hz-3000Hz
Voice coil diameter (mm)125mm
Voice coil diameter (in)5in
Chassis TypeCast aluminium
Magnet TypeNeodymium
Voice coil materialRound copper
Former MaterialGlass fibre
Cone materialCarbon fibre loaded paper
Surround MaterialCloth-sealed
SuspensionDouble
Xmax9mm/0.35in
Gap Depth12mm/0.47in
Voice coil winding width30mm/1.18in
Small Signal Parameters
Sd1661.90cm2/257.59in2
Fs32.20Hz
Mms344.10g/12.14oz
Qms5.819
Qes0.339
Qts0.320
Re5.57Ω
Vas276.70L/9.77ft3
BI33.85Tm
Cms0.07mm/N
Rms11.98kg/s
Le (at 1kHz)2.25mH
Mounting Information
Mounting slot dimensions12.5mm x 8.5mm/0.49in x 0.33in Ø
Mounting slot PCD520mm-528mm/20.5in-20.8in
Number of mounting slots8
Overall Depth254mm/10in
Overall Diameter (mm)550mm
Overall Diameter (in)21.65in
Cut-out diameter492mm/19.37in
Unit Weight12.8kg/28.2lb