Celestion NTR21-5010JD 21" Neodymium Subwoofer 8 Ohm

Brand:| Model: NTR21-5010JD
For live sound low frequency reproduction, Celestion's 21" NTR21-5010JD can't be beat! The high output and power handling, low distortion design is second to none.
  • 5" diameter inside/outside wound voice coil
  • Extensively vented neodymium motor
  • High power handling and high output
  • 9 mm of Xmax and double suspension for extra long excursion
Part # 
Weight: 37.5 lbs.  
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List Price$823.50
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Part # 294-2042
Qty:  EA
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Product Details

Celestion NTR21-5010JD 21" Neodymium Subwoofer 8 Ohm

Celestion's NTR21-5010JD 21" subwoofer features an advanced neodymium-powered motor for maximum output without maximum weight. To keep control of the driver when used with high power amplifiers (of up to 1,600 watts RMS), Celestion employs double suspension and a multi-roll surround for exceptional linearity during extreme excursion moments that are common with lower frequency reproduction. A lightweight carbon fiber-loaded paper cone is used due to its rigidity and ability to respond quickly to audio impulses.

Intelligent heat management is designed into the cast aluminum chassis, high temperature 5" inside/outside wound voice coil, and extensively vented neodymium magnet which prevents thermal compression and the resulting loss and sensitivity. Last, but certainly not least, this 21" subwoofer has an amazing 9 mm of Xmax to move massive amounts of air.

Product Specifications
  • Nominal Diameter21"
  • Power Handling (RMS)1600 Watts
  • Power Handling (max)3200 Watts
  • Impedance8 ohms
  • Frequency Response30 to 3,000 Hz
  • Sensitivity98 dB 1W/1m
  • Voice Coil Diameter5"
Thiele-Small Parameters
  • Resonant Frequency (Fs)30.2 Hz
  • DC Resistance (Re)5.36 ohms
  • Voice Coil Inductance (Le)2.06 mH
  • Mechanical Q (Qms)5.23
  • Electromagnetic Q (Qes)0.31
  • Total Q (Qts)0.29
  • Compliance Equivalent Volume (Vas)12.05 ft.³
  • Maximum Linear Excursion (Xmax)9 mm
Materials of Construction
  • Cone MaterialCarbon Fiber Composite
  • Surround MaterialCloth
  • Basket / Frame MaterialCast Aluminum
  • Magnet MaterialNeodymium
Mounting Information
  • Overall Outside Diameter21.65"
  • Baffle Cutout Diameter19.37"
  • Depth10"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume1.78 ft.³
  • Sealed F382 Hz
  • Vented Volume3.55 ft.³
  • Vented F352 Hz
Celestion NTR21-5010JD 21" Neodymium Subwoofer 8 Ohm
  • BrandCelestion
  • ModelNTR21-5010JD
  • Part Number294-2042
  • UPC739894576307
  • Product CategoryWoofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Weight37.5 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Celestion NTR21-5010JD 21" Neodymium Subwoofer 8 Ohm

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Celestion NTR21-5010JD 21" Neodymium Subwoofer 8 Ohm

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