Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Download for HornrespB&C 21DS115 4Ω
LF DriverMedia
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Overview
LF Driver21DS series
B&C
B&C 21DS115
B&C 21DS115 is a 21" 4 ohm LF driver rated at 1700W RMS. The validated T/S data includes Fs 32Hz, Qts 0.21, Vas 219L, Xmax 15mm, sensitivity 97.2dB, plus 2430cm³ Vd and 145 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £497.00.
Size
21"
Impedance
4Ω
RMS Power
1700W
Sensitivity
97.2dB
100.0dBmanufacturer; using T/S-derived value (2.8dB delta).
EBP
145
Vented alignment
Vd
2430cm³
Frequency response
Manufacturer-provided response plots and related charts.
T/S Parameters
Valid
Fs32Hz
Qts0.21
Qes0.22
Qms9.8
Vas219.0L
Re2.1Ω
Le2.30mH
BL28.6Tm
Sd1620cm²
Mms409g
Xmax15.0mm
SPL97dB
Power1700W
Power Nominal1700W
Impedance4Ω
Min Impedance3.1Ω
F Low30Hz
F High500Hz
Voice Coil116mm
Flux Density0.80T
Pricing & availability
Price definitionsPrice movement
Other offers
3 vendorsjpleisure
Updated 7 Aug 2026· 4Ω
Source: ex VAT · 20%
£504.73
inc VAT
In stock
jpleisure
Updated 11 Sept 2026· 4Ω
Source: ex VAT · 20%
£504.73
inc VAT
In stock
partsexpress
Updated 11 Sept 2026· 4Ω
Source: ex VAT
£631.73
inc VAT
2 in stock
Best current price
Updated 11 Sept 2026
bluearan
£497.00
Avg £534.55£37.55 below avg (-7.0%)
inc VAT·1 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
Weight14.7kg
Diameter547.0mm
Overall Depth255.0mm
Cutout Diameter508.0mm
Bolt Circle Diameter527.0mm
Additional Manufacturer Specs
Bl28.6 Tm
Fs32 Hz
Le2.3 mH
Re2.1 Ω
Sd1620 cm² (251.1 in²)
Ebp145 Hz
Mms409 g
Qes0.22
Qms9.8
Qts0.21
Vas219 dm³ (7.73 ft³)
η03.3 %
ConeRCK21DS1154
Xmax15 mm
Xvar11.5 mm
SpiderDouble Silicone
Cone ShapeRadial
Pole DesignT-Pole
Winding Depth36 mm (1.42 in)
Surround ShapeTriple Roll
Former MaterialGlass Fibre
Magnet MaterialNeodymium Inside Slug
Nominal Diameter530 mm (21 in)
Winding MaterialAluminium
Magnetic Gap Depth14 mm (0.55 in)
Recommended Tuning40 Hz
Bolt Circle Diameter527 mm (20.7 in)
Recommended Enclosure130 dm³ (4.59 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 Driver15 dm³ (0.53 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
21DS115
21"
Best current price
£497.00
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.
71%
Similarity
Eighteen Sound
21ID
21"
Xmax14mm-7%
Qts0.23+10%
BL25.2Tm-12%
Vas143L-35%
Qes0.24+9%