Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespRCF LF21X451 8Ω
LF DriverMedia
Auto-advancing
Overview
LF Driver
RCF
RCF LF21X451
RCF LF21X451 is a 21" 8 ohm LF driver rated at 2000W RMS. The validated T/S data includes Fs 28Hz, Qts 0.37, Vas 385L, Xmax 14mm, sensitivity 95.4dB, plus 2380cm³ Vd and 72 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £389.00.
Size
21"
Impedance
8Ω
RMS Power
2000W
Sensitivity
95.4dB
97.0dBmanufacturer; using T/S-derived value (1.6dB delta).
EBP
72
Either alignment
Vd
2380cm³
T/S Parameters
Valid
Fs28Hz
Qts0.37
Qes0.39
Qms6.9
Vas385.0L
Re5.4Ω
Le2.90mH
BL30.5Tm
Sd1700cm²
Mms355g
Xmax14.0mm
SPL95dB
Power2000W
Impedance8Ω
Min Impedance6.7Ω
F Low28Hz
F High1000Hz
Voice Coil114mm
Pricing & availability
Price definitionsPrice movement
Best current price
Updated 11 Sept 2026
bluearan
£389.00
inc VAT·7 in stock
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
Weight15.5kg
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
LF21X451
21"
Best current price
£389.00
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.
12 matches
Compare a specific driver
Added drivers stay at the front of the list, whatever the ranges say.
70%
Similarity
51% cheaper£192.29
Dayton Audio
PSS555-8
21"
Lower price
Xmax11mm-21%
Qts0.33-11%
BL29.7Tm-3%
Vas444L+15%
Qes0.34-13%
77%
Similarity
12% cheaper£343.60
SB Audience
NERO-21SW1100D
21"
Lower price
Xmax12.2mm-13%
Qts0.34-8%
BL30Tm-2%
Vas312.6L-19%
Qes0.35-10%
54%
Similarity
2% cheaper£380.00
Eighteen Sound
21NLW4100
21"
Lower price
Xmax15.2mm+9%
Qts0.46+24%
BL29.4Tm-4%
Vas210L-45%
Qes0.49+26%
41%
Similarity
3% more£399.00
Lavoce
SAN214.50
21"
Higher price
Xmax15.4mm+10%
Qts0.28-24%
BL39.6Tm+30%
Vas218.3L-43%
Qes0.29-26%
55%
Similarity
9% more£425.00
Beyma
21QLEX1600FE
21"
Higher price
Xmax13mm-7%
Qts0.28-24%
BL36.4Tm+19%
Vas309L-20%
Qes0.3-23%
67%
Similarity
10% more£428.34
BishopSound
BWN21/4
21"
Higher price
Xmax15mm+7%
Qts0.42+13%
BL32.6Tm+7%
Vas244.2L-37%
Qes0.46+17%
67%
Similarity
10% more£428.34
BishopSound
BWN21/8
21"
Higher price
Xmax15mm+7%
Qts0.42+13%
BL32.6Tm+7%
Vas244.2L-37%
Qes0.46+17%
73%
Similarity
14% more£445.00
Celestion
TSQ2145
21"
Higher price
Xmax15mm+7%
Qts0.34-7%
BL33.8Tm+11%
Vas253.8L-34%
Qes0.36-8%
95%
Similarity
24% more£481.99
B&C
21SW115
21"
Higher price
Xmax14mm0%
Qts0.370%
BL30.1Tm-1%
Vas318L-17%
Qes0.390%
79%
Similarity
24% more£481.99
B&C
21SW115
21"
Higher price
Xmax14mm0%
Qts0.36-3%
BL24.8Tm-19%
Vas278L-28%
Qes0.37-5%
78%
Similarity
27% more£492.21
Eighteen Sound
21LW2600
21"
Higher price
Xmax14.6mm+4%
Qts0.33-11%
BL32.5Tm+7%
Vas333L-14%
Qes0.34-13%
Image unavailable
85%
Similarity
46% more£569.00
Precision Devices
PD.2155-1N
21"
Higher price
Xmax14mm0%
Qts0.36-3%
BL30Tm-2%
Vas241L-37%
Qes0.37-4%