Hornresp
.txt · Hornresp driver database
Driver file ready to place in Hornresp’s Drivers folder.
Not enough T/S data
Missing Mms
BishopSound BWP18/4 4Ω
LF DriverMedia
Auto-advancing
Overview
LF DriverBWP series
BishopSound
BishopSound BWP18/4
BishopSound BWP18/4 is a 18" 4 ohm LF driver rated at 1800W RMS. The validated T/S data includes Fs 35Hz, Qts 0.31, Vas 378L, Xmax 12mm, sensitivity 100dB, plus 1596cm³ Vd and 135 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £320.34.
Partial source evidence
Automated T/S checks passed, but some material low-frequency parameters are not published for this record.
Material fields not published: Mms
- Manufacturer page linked
- Datasheet linked
- Canonical units normalized for comparison
- Vd can be derived from Sd and Xmax
- EBP can be derived from Fs and Qes
Size
18"
Impedance
4Ω
RMS Power
1800W
Sensitivity
100.0dB
98.0dBmanufacturer; using T/S-derived value (2.0dB delta).
EBP
135
Vented alignment
Vd
1596cm³
Datasheet traces
Frequency and impedance curves traced from the manufacturer PDF.
spl207 ptsp1medium
Curve provenanceInspect 2 tracesHide details
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
spl
Frequency response
207 plotted pointsMedium confidence287 selected pixels of 287 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
214 plotted pointsMedium confidence321 selected pixels of 321
T/S Parameters
Valid
Fs35Hz
Qts0.31
Qes0.26
Qms5.2
Vas378.0L
Re5.1Ω
Le2.10mH
BL26.2Tm
Sd1330cm²
Xmax12.0mm
SPL100dB
Power1800W
Impedance4Ω
Min Impedance3.0Ω
F Low35Hz
F High1000Hz
Voice Coil125mm
Flux Density1.20T
Pricing & availability
Price definitionsPrice movement
Best current price
Updated 11 Sept 2026
bishopsound
£320.34
inc VAT·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.
Not enough T/S data
Missing Mms
BASTA!
.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.
Not enough T/S data
Missing Mms
00 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
Weight19.0kg
Diameter460.0mm
Overall Depth202.0mm
Bolt Circle Diameter440.0mm
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
BishopSound
BWP18/4
18"
Best current price
£320.34
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.
64%
Similarity
33% cheaper£215.75
RCF
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18"
Lower price
Xmax9mm-25%
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Vas268L-29%
Qes0.3+15%
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FaitalPRO
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Qes0.3+15%
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B&C
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18"
Lower price
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Qes0.33+27%
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Celestion
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RCF
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18"
Lower price
Xmax12mm0%
Qts0.3-3%
BL26.5Tm+1%
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Qes0.31+19%
69%
Similarity
24% cheaper£245.00
RCF
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18"
Lower price
Xmax9mm-25%
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BL24.6Tm-6%
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Qes0.29+12%
62%
Similarity
22% cheaper£250.53
Eighteen Sound
18LW1251
18"
Lower price
Xmax9mm-25%
Qts0.27-13%
BL23.6Tm-10%
Vas268L-29%
Qes0.28+8%
46%
Similarity
20% cheaper£254.80
FaitalPRO
18FH500
18"
Lower price
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64%
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B&C
18TBW100
18"
Lower price
Xmax12mm0%
Qts0.32+3%
BL22.8Tm-13%
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65%
Similarity
16% cheaper£270.47
Eighteen Sound
18LW1400
18"
Lower price
Xmax9mm-25%
Qts0.29-6%
BL24.7Tm-6%
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Qes0.31+19%
66%
Similarity
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Eighteen Sound
18LW2400
18"
Lower price
Xmax9.5mm-21%
Qts0.310%
BL25.6Tm-2%
Vas230L-39%
Qes0.32+23%
63%
Similarity
15% cheaper£273.68
Beyma
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18"
Lower price
Xmax10mm-17%
Qts0.27-13%
BL29Tm+11%
Vas228.9L-39%
Qes0.28+8%