Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespCelestion NTR21-5010JD 8Ω
LF DriverMedia
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Overview
LF DriverNTR21 series
Celestion
Celestion NTR21-5010JD
Celestion NTR21-5010JD is a 21" 8 ohm LF driver rated at 1600W RMS. The validated T/S data includes Fs 32Hz, Qts 0.32, Vas 276.7L, Xmax 9mm, sensitivity 96.4dB, plus 1496cm³ Vd and 95 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £449.00.
Size
21"
Impedance
8Ω
RMS Power
1600W
Sensitivity
96.4dB
98.0dBmanufacturer; using T/S-derived value (1.6dB delta).
EBP
95
Either alignment
Vd
1496cm³
Datasheet traces
Frequency and impedance curves traced from the manufacturer PDF.
LF frequency response137 ptsp1medium
Curve provenanceInspect 1 traceHide details
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
LF frequency response
Frequency response
137 plotted pointsMedium confidence280 selected pixels of 444
T/S Parameters
Valid
Fs32Hz
Qts0.32
Qes0.34
Qms5.8
Vas276.7L
Re5.6Ω
Le2.25mH
BL33.9Tm
Sd1662cm²
Mms344g
Xmax9.0mm
SPL96dB
Power1600W
Impedance8Ω
Voice Coil125mm
Pricing & availability
Price definitionsPrice movement
Other offers
1 vendorleanaudio
Updated 11 Sept 2026· 8Ω
Source: inc VAT · 20%
£449.00
inc VAT
Out of stock
Best current price
Updated 17 May 2026
leanbusiness
£449.00
inc VAT
Use this driver
Open it in 00 Simulator, download it for your enclosure tool, or copy the specification values.
Files use canonical values. Required mechanical fields are derived only where the target format needs them.
WinISD
.wdr · WinISD driver editor
Native WinISD driver record with the required SI conversions.
Download for WinISDBASTA!
.bastaelement · BASTA! loudspeaker simulator
Native BASTA! element file using its documented SI-unit fields.
Download for BASTA!VituixCAD
.wdr · VituixCAD 2 Enclosure
A WinISD driver file that VituixCAD imports directly.
Download for VituixCAD00 Simulator
Direct import · Web app
Start a new enclosure simulation with this driver already loaded.
Open in 00 SimulatorCopy spec sheet
Plain text · Clipboard
Copy the available values as a clean label-and-value list.
Dimensions & Physical
Weight12.8kg
Diameter550.0mm
Overall Depth254.0mm
Cutout Diameter492.0mm
Bolt Circle Diameter528.0mm
Similar Drivers
Size stays fixed. Tune the T/S ranges to change what counts as a match, or add a specific driver to compare it directly.
Reference
Celestion
NTR21-5010JD
21"
Best current price
£449.00
Compare on
Matches sit inside every range. Size stays fixed automatically.
5 active T/S params, plus size. Pin a driver to open a side-by-side comparison.
1 match
Compare a specific driver
Added drivers stay at the front of the list, whatever the ranges say.
54%
Similarity
P.Audio
SD21-125XB
21"
Xmax11.3mm+25%
Qts0.38+19%
BL30.4Tm-10%
Vas345.6L+25%
Qes0.4+18%