Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespB&C 21IPAL 1Ω
LF DriverMedia
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Overview
LF Driver21IPAL series
B&C
B&C 21IPAL
B&C 21IPAL is a 21" 1 ohm LF driver rated at 2500W RMS. The validated T/S data includes Fs 37Hz, Qts 0.21, Vas 155L, Xmax 22mm, sensitivity 97.6dB, plus 3696cm³ Vd and 168 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £863.28.
Size
21"
Impedance
1Ω
RMS Power
2500W
Sensitivity
97.6dB
99.0dBmanufacturer; using T/S-derived value (1.4dB delta).
EBP
168
Vented alignment
Vd
3696cm³
Frequency response
Manufacturer-provided response plots and related charts.
T/S Parameters
Valid
Fs37Hz
Qts0.21
Qes0.22
Qms4.9
Vas155.0L
Re0.7Ω
Le0.50mH
BL19.1Tm
Sd1680cm²
Mms487g
Xmax22.0mm
SPL98dB
Power2500W
Power Nominal2500W
Impedance1Ω
Min Impedance1.1Ω
F Low37Hz
F High1000Hz
Voice Coil153mm
Flux Density1.35T
Pricing & availability
Price definitionsPrice movement
Other offers
2 vendorsjpleisure
Updated 7 Aug 2026
Source: ex VAT · 20%
£1,019.10
inc VAT
In stock
jpleisure
Updated 11 Sept 2026
Source: ex VAT · 20%
£1,019.10
inc VAT
In stock
Best current price
Updated 11 Sept 2026
bluearan
£863.28
Avg £967.16£103.88 below avg (-10.7%)
inc VAT·2 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.
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.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
Weight23.0kg
Diameter547.0mm
Overall Depth269.0mm
Cutout Diameter508.0mm
Bolt Circle Diameter527.0mm
Additional Manufacturer Specs
Bl19.1 Tm
Fs37 Hz
Le0.5 mH
Re0.7 Ω
Sd1680 cm² (260.4 in²)
Ebp168 Hz
Mms487 g
Qes0.22
Qms4.9
Qts0.21
Vas155 dm³ (5.47 ft³)
η03.2 %
ConeRCK21IPAL
Xmax22 mm
Xvar15 mm
SpiderDouble Silicone
Cone ShapeRadial
Pole DesignT-Pole
Winding Depth48 mm (1.9 in)
Surround ShapeTriple Roll
Former MaterialGlass Fibre
Magnet MaterialNeodymium Inside Slug
Nominal Diameter530 mm (21 in)
Winding MaterialAluminium
Magnetic Gap Depth18 mm (0.7 in)
Recommended Tuning40 Hz
Bolt Circle Diameter527 mm (20.7 in)
Recommended Enclosure200 dm³ (7.06 ft³)
Woofer Cone TreatmentTWP Waterproof Both Sides
Baffle Cutout Diameter508 mm (20 in)
Flange And Gasket Thickness13 mm (0.51 in)
Air Volume Occupied By Driver16 dm³ (0.56 ft³)
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
B&C
21IPAL
21"
Best current price
£863.28
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