NTR21-5010JD
LF Cast Chassis / Neo
Coaxial/Twin Cone
- TF1218TC
- TF1225CX
Compact Array
- AN2075
- AN2775
- AN3510
Compression Drivers / Ferrite
- CDX1-1010
- CDX1-1440
- CDX1-1445
- CDX1-1446
- CDX1-1745
- CDX1-1746
- CDX1-1747
- CDX14-3060
- CDX20-3075
Compression Drivers / Neo
- CDX1-1415
- CDX1-1425
- CDX1-1430
- CDX1-1720
- CDX1-1730
- CDX1-1731
- CDX14-2420
- CDX14-3050
- CDX20-3000
Horns
- H1-7050 'NoBell'
- H1-9040P
LF Cast Chassis / Ferrite
- CF18VJD
- CF1830E
- CF1840JD
- FTR08-2011D
- FTR12-3070C
- FTR12-4080HDX
- FTR15-3070C
- FTR15-3070E
- FTR15-4080HD
- FTR15-4080HDX
- FTR15-4080F
- FTR15-4080FD
- FTR18-4080F
- FTR18-4080FDX
- FTR18-4080HDX
- FTR18-4080FD
LF Cast Chassis / Neo
- NTR06-1705D
- NTR08-2009D
- NTR08-2011D
- NTR10-2016D
- NTR10-2520D
- NTR10-2520E
- NTR12-3018D
- NTR15-3018E
- NTR21-5010JD
LF Pressed Chassis / Ferrite
- TF0510
- TF0615
- TF0818
- TF1015
- TF1018
- TF1020
- TF1215
- TF1218
- TF1220
- TF1225e
- TF1225
- TF1230
- TF1230SL
- TF1520
- TF1525
- TF1525e
- TF1530SL
- TF1530
- TF1530e
- K12H-100TC
- K12H-200TC
LF Pressed Chassis / Neo
- TN0820
- TN1020
- TN1225
- TN1230
- TN1525
- TN1530
Midrange
- TF0410MR
- TF0510MR
- TF0615MR
- TF0818MR
- NTR06-1705B
Features
- 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
8Ω Frequency Response
- Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance. Loudspeaker tested in free air.
- Measured on axis at 1W, 1m in 2π anechoic environment.
- Xmax derived from: (voice coil winding width-gap depth)/2.
- Small signal parameters measured after unit subjected to pre-conditioning signal.
General Specifications
Nominal diameter
530mm/21in
Power rating1
1600Wrms
Nominal impedance
8Ω
Sensitivity2
98dB
Frequency range
30-3000Hz
Voice coil diameter
125mm/5in
Chassis type
Cast aluminium
Magnet type
Neodymium
Coil material
Round copper
Former material
Glass fibre
Cone material
Carbon fibre loaded paper
Surround material
Cloth-sealed
Suspension
Double
Xmax3
9mm/0.35in
Gap depth
12mm/0.47in
Voice coil winding width
30mm/1.18in
Small Signal Parameters4
D
0.46m/18.11in
Fs
30.2Hz
Mms
318.85g/11.26oz
Mmd
280.52g/9.9oz
Qms
5.231
Qes
0.309
Qts
0.291
Re
5.36Ω
Vas
341.43lt/12.05ft3
BI
32.39Tm
Cms
0.087mm/N
Rms
11.55Kg/s
Le (at 1kHz)
2.063mH
Mounting Information
Diameter
550mm/21.65in
Overall depth
254mm/10in
Cut-out diameter
492mm/19.37in
Mounting slot dimensions
12.5mm x 8.5mm/0.49in x 0.33in
Number of mounting slots
8
Mounting PCD range
520-528mm/20.5-20.8in
Unit weight
12.8kg/28.2lb
Packed Dimensions & Weight
Single pack size W x D x H
575mm x 575mm x 280mm
/22.6in x 22.6in x11.0in
Single pack weight
13.2kg/29lb
