CelestionFTR18-4080FD
£219.38Fs25 Hz −28%, better
Qts0.29 −8%
Vas408.7 L +8%
BL22.8 T·m −13%, worse
Xmax8.5 mm −29%, worse
Sensitivity95.4 dB −4.6, worse
18-inch LF driver · BWP series · 125 mm voice coil · 1,500 W
BishopSound BWP18/8 8Ω
8 Ω · 35–1000 Hz
No current price
- Fs
- 35Hz
- Xmax
- 12mm
- SPL
- 100dB
- Pe
- 1500W
- BL
- 26.2T·m
- Vd
- 1596cm³
- Qts
- 0.31
- Vas
- 378L
Manufacturer response and impedance data, with source and trace details below. The left and right arrow keys read every shown curve at a frequency, a twelfth of an octave at a time, or an octave with Shift. Escape clears the reading.
Curve provenanceInspect 1 trace
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
spl
Frequency response
123 plotted pointsMedium confidence135 selected pixels of 135
BishopSound BWP18/8 is an 18-inch 8 ohm LF driver rated at 1500 W RMS. The validated T/S data includes Fs 35 Hz, Qts 0.31, Vas 378 L, Xmax 12 mm, sensitivity 100 dB, plus 1596 cm³ Vd and 135 EBP. bits tracks vendor pricing, datasheet links, simulator import data, and similar drivers from the same loudspeaker database.
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
Thiele/Small
- Fs
- 35Hz
- Qts
- 0.31
- Qes
- 0.26
- Qms
- 5.2
- Vas
- 378L
- Re
- 5.1Ω
- Le
- 2.10mH
Motor and cone
- BL
- 26.2T·m
- Sd
- 1330cm²
- Xmax
- 12mm
- Vd †
- 1596cm³
- Voice coil
- 125mm
- Flux density
- 1.20T
Power and response
- Sensitivity †
- 100dB
- Manufacturer sensitivity
- 98dB
- Power
- 1500W
- Impedance
- 8Ω
- Min. impedance
- 6.5Ω
- Range
- 35–1000Hz
- EBP †
- 135 · Leans vented
Size and mounting
- Diameter
- 460mm
- Bolt circle
- 440mm
- Depth
- 202mm
- Weight
- 19kg
Other published values
- Xmech
- 15.3
- Power Program
- 3000
Sensitivity shows 100.0 dB, calculated from the T/S values. BishopSound publishes 98.0 dB, 2.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else BishopSound lists
LF · Primary · 18″
- BL
- 26.2T·m
- Fs
- 35Hz
- Le
- 2.10mH
- Re
- 5.1Ω
- Sd
- 1330cm²
- Qes
- 0.26
- Qms
- 5.2
- Qts
- 0.31
- SPL
- 100dB
- Vas
- 378L
- Xmax
- 12mm
- Xmech
- 15.3
- Power
- 1500W
- Impedance
- 8Ω
- Flux density
- 1.20T
- Sensitivity
- 98dB
- Low limit
- 35Hz
- Power Program
- 3000
- Calculated sensitivity †
- 100dB
- High limit
- 1000Hz
- Manufacturer sensitivity
- 98dB
- Min. impedance
- 6.5Ω
- Voice coil
- 125mm
- Weight
- 19kg
- Diameter
- 460mm
- Depth
- 202mm
- Bolt circle
- 440mm
02
Compare
Same-size drivers, compared with the BWP18/8. Clear differences are green when better and red when worse.
This driverBWP18/8
Best price
–
Fs
35 Hz
Qts
0.31
Vas
378 L
BL
26.2 T·m
Xmax
12 mm
Sensitivity
100 dB
Power
1500 W
FaitalPRO18FH510
£221.89Fs30 Hz −14%, better
Qts0.29 −6%
Vas411.9 L +9%
BL21 T·m −20%, worse
Xmax9.3 mm −23%, worse
Sensitivity97.7 dB −2.3, worse
RCFLF18G401
£252.42Fs33 Hz −6%
Qts0.29 −6%
Vas268 L −29%, better
BL24.6 T·m −6%
Xmax9 mm −25%, worse
Sensitivity97.1 dB −2.9, worse
FaitalPRO18HP1022
£266.26Fs35 Hz –
Qts0.30 −3%
Vas204.9 L −46%, better
BL28 T·m +7%
Xmax9.5 mm −21%, worse
Sensitivity96.6 dB −3.4, worse
Eighteen Sound18LW2400
£272.63Fs35 Hz –
Qts0.31 –
Vas230 L −39%, better
BL25.6 T·m –
Xmax9.5 mm −21%, worse
Sensitivity96.9 dB −3.1, worse
Beyma18PW1400FE
£273.68Fs32 Hz −9%
Qts0.27 −13%, better
Vas228.9 L −39%, better
BL29 T·m +11%, better
Xmax10 mm −17%, worse
Sensitivity96.3 dB −3.7, worse
Eighteen Sound18LW1400
£274.64Fs31 Hz −11%, better
Qts0.29 −6%
Vas297 L −21%, better
BL24.7 T·m −6%
Xmax9 mm −25%, worse
Sensitivity96.6 dB −3.4, worse
Beyma18LEX1200ND
£279.79Fs36 Hz –
Qts0.33 +6%
Vas219 L −42%, better
BL26.4 T·m –
Xmax11 mm −8%
Sensitivity96.7 dB −3.3, worse
Oberton18XB1301DS
£284.15Fs36 Hz –
Qts0.30 –
Vas172.9 L −54%, better
BL26.9 T·m –
Xmax12 mm –
Sensitivity96 dB −4, worse
RCFLF18X401
£289.00Fs30 Hz −14%, better
Qts0.30 −3%
Vas274 L −28%, better
BL26.5 T·m –
Xmax12 mm –
Sensitivity95.8 dB −4.2, worse
RCFL18P400
£289.00Fs29 Hz −17%, better
Qts0.28 −10%
Vas340 L −10%, better
BL24.6 T·m −6%
Xmax9 mm −25%, worse
Sensitivity96.6 dB −3.4, worse
CIARENDH18-4S
£291.62Fs31 Hz −11%, better
Qts0.32 +3%
Vas239 L −37%, better
BL27.7 T·m +6%
Xmax11.5 mm −4%
Sensitivity95.4 dB −4.6, worse
Eighteen Sound18NLW9400
£305.62Fs33 Hz −6%
Qts0.26 −16%, better
Vas268 L −29%, better
BL26 T·m –
Xmax9.5 mm −21%, worse
Sensitivity97.4 dB −2.6, worse
RCFLF18N405
£325.54Fs30 Hz −14%, better
Qts0.32 +3%
Vas227 L −40%, better
BL26.5 T·m –
Xmax14 mm +17%, better
Sensitivity94.6 dB −5.4, worse
BMS18S450
£345.00Fs29 Hz −17%, better
Qts0.31 –
Vas281 L −26%, better
BL26.5 T·m –
Xmax12 mm –
Sensitivity95.3 dB −4.7, worse
RCFLF18N401
£359.21Fs32 Hz −9%
Qts0.26 −16%, better
Vas257 L −32%, better
BL27.8 T·m +6%
Xmax9 mm −25%, worse
Sensitivity97 dB −3, worse
Oberton18XB1600V2
£388.58Fs33 Hz −7%
Qts0.28 −10%, better
Vas267 L −29%, better
BL29.6 T·m +13%, better
Xmax12.5 mm +4%
Sensitivity97.1 dB −2.9, worse
Dayton AudioRSS460HO-4
£442.94Fs19 Hz −46%, better
Qts0.32 +3%
Vas272 L −28%, better
BL23.4 T·m −11%, worse
Xmax12.8 mm +6%
Sensitivity89.2 dB −10.8, worse
BMS18N850V2
£457.13Fs30 Hz −15%, better
Qts0.33 +6%
Vas243 L −36%, better
BL25.4 T·m −3%
Xmax12 mm –
Sensitivity94.7 dB −5.3, worse
Eighteen Sound18NLW9000
£550.00Fs34 Hz –
Qts0.31 –
Vas206 L −46%, better
BL28 T·m +7%
Xmax14 mm +17%, better
Sensitivity96.1 dB −3.9, worse
B&C18HTX100
£809.86Fs44 Hz +26%, worse
Qts0.32 +3%
Vas173 L −54%, better
BL26.3 T·m –
Xmax13 mm +8%
Sensitivity98.4 dB −1.6
No photo
RCFLF18Y402
No current priceFs30 Hz −14%, better
Qts0.30 −3%
Vas274 L −28%, better
BL26.5 T·m –
Xmax12 mm –
Sensitivity95.8 dB −4.2, worse
No photo
FaneIMPERIUM 18NDXL
No current priceFs33 Hz −6%
Qts0.29 −5%
Vas203 L −46%, better
BL29.4 T·m +12%, better
Xmax12 mm –
Sensitivity95.9 dB −4.1, worse
Oberton18NSW700
No current priceFs30 Hz −13%, better
Qts0.24 −22%, better
Vas309.0 L −18%, better
BL26.6 T·m –
Xmax14 mm +17%, better
Sensitivity97.5 dB −2.5, worse
Oberton18NXB1200
No current priceFs36 Hz –
Qts0.28 −9%
Vas159.6 L −58%, better
BL29.4 T·m +12%, better
Xmax11.5 mm −4%
Sensitivity96 dB −4, worse
RCFLF18G908
No current priceFs33 Hz −6%
Qts0.29 −6%
Vas268 L −29%, better
BL24.6 T·m −6%
Xmax9 mm −25%, worse
Sensitivity97.1 dB −2.9, worse
Oberton18XB1201
No current priceFs38 Hz +9%
Qts0.32 –
Vas159.4 L −58%, better
BL26.7 T·m –
Xmax10.5 mm −13%, worse
Sensitivity96.3 dB −3.7, worse
Precision DevicesPD.185NR1
No current priceFs34 Hz –
Qts0.27 −13%, better
Vas102 L −73%, better
BL29.5 T·m +13%, better
Xmax11.8 mm –
Sensitivity93.4 dB −6.6, worse
Oberton18XB700
No current priceFs36 Hz +3%
Qts0.30 –
Vas183.2 L −52%, better
BL26.1 T·m –
Xmax9 mm −25%, worse
Sensitivity96.4 dB −3.6, worse
Oberton18NXB1601
No current priceFs35 Hz –
Qts0.29 −8%
Vas146.2 L −61%, better
BL30.5 T·m +16%, better
Xmax12.5 mm +4%
Sensitivity95.1 dB −4.9, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
No current price found. Pricing may appear after the next vendor refresh.