Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespRCF LF21N451 8Ω
LF DriverMedia
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Overview
LF Driver
RCF
RCF LF21N451
RCF LF21N451 is a 21" 8 ohm LF driver rated at 1500W RMS. The validated T/S data includes Fs 30Hz, Qts 0.26, Vas 375L, Xmax 13mm, sensitivity 97.8dB, plus 2210cm³ Vd and 111 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £371.37.
Size
21"
Impedance
8Ω
RMS Power
1500W
Sensitivity
97.8dB
EBP
111
Vented alignment
Vd
2210cm³
T/S Parameters
Valid
Fs30Hz
Qts0.26
Qes0.27
Qms6.1
Vas375.0L
Re5.6Ω
Le3.00mH
BL34.5Tm
Sd1700cm²
Mms315g
Xmax13.0mm
SPL98dB
Power1500W
Impedance8Ω
Min Impedance7.1Ω
F Low30Hz
F High1000Hz
Voice Coil114mm
Pricing & availability
Price definitionsPrice movement
Other offers
1 vendorbluearan
Updated 11 Sept 2026· 8Ω
Source: inc VAT · 20%
£475.00
inc VAT
1 in stock
Best current price
Updated 11 Sept 2026
leanbusiness
£371.37
Avg £423.19£51.82 below avg (-12.2%)
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.
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Direct import · Web app
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Plain text · Clipboard
Copy the available values as a clean label-and-value list.
Dimensions & Physical
Weight10.9kg
Diameter547.0mm
Cutout Diameter512.0mm
Bolt Circle Diameter527.0mm
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
RCF
LF21N451
21"
Best current price
£371.37
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.
11 matches
Compare a specific driver
Added drivers stay at the front of the list, whatever the ranges say.
63%
Similarity
7% more£399.00
Lavoce
SAN214.50
21"
Higher price
Xmax15.4mm+18%
Qts0.28+8%
BL39.6Tm+15%
Vas218.3L-42%
Qes0.29+7%
83%
Similarity
14% more£425.00
Beyma
21QLEX1600FE
21"
Higher price
Xmax13mm0%
Qts0.28+8%
BL36.4Tm+6%
Vas309L-18%
Qes0.3+11%
73%
Similarity
15% more£426.63
Eighteen Sound
21LW1400
21"
Higher price
Xmax9.5mm-27%
Qts0.24-8%
BL33.5Tm-3%
Vas385L+3%
Qes0.24-11%
62%
Similarity
34% more£497.00
B&C
21DS115
21"
Higher price
Xmax16.5mm+27%
Qts0.27+4%
BL39.3Tm+14%
Vas204L-46%
Qes0.28+4%
50%
Similarity
34% more£497.00
B&C
21DS115
21"
Higher price
Xmax15mm+15%
Qts0.21-19%
BL28.6Tm-17%
Vas219L-42%
Qes0.22-19%
60%
Similarity
55% more£576.21
Eighteen Sound
21NLW9001
21"
Higher price
Xmax14mm+8%
Qts0.31+19%
BL37Tm+7%
Vas244L-35%
Qes0.34+26%
60%
Similarity
58% more£585.00
B&C
21SW152
21"
Higher price
Xmax15mm+15%
Qts0.3+15%
BL32.5Tm-6%
Vas200L-47%
Qes0.31+15%
56%
Similarity
88% more£699.33
Eighteen Sound
21NLW9601
21"
Higher price
Xmax14mm+8%
Qts0.29+12%
BL43Tm+25%
Vas175L-53%
Qes0.31+15%
Image unavailable
45%
Similarity
109% more£777.00
Precision Devices
PD.2160-1N
21"
Higher price
Xmax16mm+23%
Qts0.3+15%
BL43Tm+25%
Vas177L-53%
Qes0.31+15%
76%
Similarity
Beyma
121LEX16ND8
21"
Xmax14mm+8%
Qts0.29+12%
BL36.6Tm+6%
Vas305L-19%
Qes0.3+11%
57%
Similarity
Eighteen Sound
21NLW5300
21"
Xmax15.3mm+18%
Qts0.32+23%
BL31Tm-10%
Vas325L-13%
Qes0.34+26%