Speaker - Celestion, 21", NTR21-5010JD, 1600W, 8Ω

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Speaker - Celestion, 21", NTR21-5010JD, 1600W, 8Ω

Note: special order items require additional lead time. See our page on special order items.

Special Order Item

Speaker, Celestion, NTR21-5010JD, 21", 8Ω.


  • 21" neodymium subwoofer offers 1600Wrms (AES standard) power handling and 98dB sensitivity
  • 5" high temperature Inside/Outside voice coil efficiently dissipates heat, preventing sensitivity loss through thermal compression
  • Double suspension and a "multi-roll" surround provide exceptional linearity at extremes of cone excursion
  • Rigid lightweight carbon fibre loaded cone delivers improved performance and faster response
  • Intelligent heat management in both chassis and magnet assembly design further minimizes distortion
RoHS Compliant
Item ID:
CelestionCelestion Bass
Product Measurements
Chassis TypeCast aluminium
Coil MaterialRound copper
Cone MaterialCarbon fibre loaded paper
Cut-out Diameter492 mm
D460 mm
Diaphragm/Coil Mass (Mmd)280.52 g
Electrical Q Factor (Qes)0.309
Equivalent Acoustic Volume (VAS)341.43 liters
Force Factor (BxL)32.93 Wb/m
Former MaterialGlass fibre
Frequency Range30 Hz - 3,000 Hz
Gap Depth12 mm
Magnet TypeNeodymium
Maximum Linear Displacement (XMAX)9 mm
Mechanical Compliance (CMS)0.087mm/N
Mechanical Moving Mass (MMS)318.85 g
Mechanical Q Factor (QMS)5.231
Mechanical Resistance of Driver (Rms)11.55 kg/s
Mounting Hole Bolt Circle Diameter520 mm - 528 mm
Mounting Hole Length12.5 mm
Mounting Hole Width8.5 mm
Mounting Slots8
Nominal Diameter21 in.
Nominal Impedance8 Ω
Overall Depth254 mm
Overall Diameter550 mm
Power Rating1,600 Wrms
Resonance Frequency (ƒS)30.2 Hz
Sensitivity98 dB
Surround MaterialCloth-sealed
Total Q Factor (QTS)0.291
Voice Coil DC Resistance (Re)5.36Ω
Voice Coil Diameter5 in.
Voice Coil Inductance @ 1 kHZ (LE)2.063 mH
Voice Coil Winding Width30 mm
Packaging Information
Packaging Dimensions23 in. × 23 in. × 11 in.
Weight (Packaging)37.5 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet213.53 KB

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