GRS18PT-8
£64.33Fs23 Hz −52%, better
Qts0.54 −33%, better
Vas475.7 L +278%, worse
BL19.5 T·m −7%
Xmax7.8 mm –
Sensitivity92 dB −2.2, worse
18-inch LF driver · BSP series · 100 mm voice coil · 600 W
BishopSound BSP18 8Ω
8 Ω
No price for delivery to the UK
- Fs
- 48Hz
- Xmax
- 8mm
- SPL
- 94dB
- Pe
- 600W
- BL
- 21.0T·m
- Vd
- 1041cm³
- Qts
- 0.81
- Vas
- 126L
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 2 traces
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
spl
Frequency response
240 plotted pointsMedium confidence544 selected pixels of 544 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence653 selected pixels of 653
BishopSound BSP18 is an 18-inch 8 ohm LF driver rated at 600 W RMS. The validated T/S data includes Fs 48 Hz, Qts 0.81, Vas 125.9 L, Xmax 8 mm, sensitivity 94.2 dB, plus 1041 cm³ Vd and 57 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
- 48Hz
- Qts
- 0.81
- Qes
- 0.85
- Qms
- 18.7
- Vas
- 125.9L
- Re
- 7.6Ω
- Le
- 4.29mH
Motor and cone
- BL
- 21.0T·m
- Sd
- 1301cm²
- Xmax
- 8mm
- Vd †
- 1041cm³
- Voice coil
- 100mm
Power and response
- Sensitivity †
- 94.2dB
- Manufacturer sensitivity
- 94.2dB
- Power
- 600W
- Impedance
- 8Ω
- EBP †
- 57 · Sealed or vented
Size and mounting
- Diameter
- 460mm
- Bolt circle
- 445mm
- Depth
- 208mm
† Calculated by bits from the published values
What this validation status means
Everything else BishopSound lists
LF · Primary · 18″
- BL
- 21.0T·m
- Fs
- 48Hz
- Le
- 4.29mH
- Re
- 7.6Ω
- Sd
- 1301cm²
- Qes
- 0.85
- Qms
- 18.7
- Qts
- 0.81
- SPL
- 94.2dB
- Vas
- 125.9L
- Xmax
- 8mm
- Power
- 600W
- Impedance
- 8Ω
- Sensitivity
- 94.2dB
- Calculated sensitivity †
- 94.2dB
- Manufacturer sensitivity
- 94.2dB
- Voice coil
- 100mm
- Diameter
- 460mm
- Depth
- 208mm
- Bolt circle
- 445mm
02
Compare
Same-size drivers, compared with the BSP18. Clear differences are green when better and red when worse.
This driverBSP18
Best price
–
Fs
48 Hz
Qts
0.81
Vas
125.9 L
BL
21.0 T·m
Xmax
8 mm
Sensitivity
94.2 dB
Power
600 W
B&C18PS100
£205.00Fs30 Hz −38%, better
Qts0.39 −52%, better
Vas245 L +95%, worse
BL22.5 T·m +7%
Xmax8 mm –
Sensitivity94.1 dB –
Beyma18LX60V2S
£218.33Fs35 Hz −27%, better
Qts0.48 −41%, better
Vas236 L +87%, worse
BL21.8 T·m +4%
Xmax8 mm –
Sensitivity95.1 dB +0.9
CelestionFTR18-4080FD
£219.38Fs25 Hz −48%, better
Qts0.29 −65%, better
Vas408.7 L +225%, worse
BL22.8 T·m +8%
Xmax8.5 mm +6%
Sensitivity95.4 dB +1.2
RCFL18P300
£225.00Fs33 Hz −31%, better
Qts0.33 −59%, better
Vas226 L +79%, worse
BL23.5 T·m +12%, better
Xmax8 mm –
Sensitivity95.8 dB +1.6
B&C18PZW100
£227.00Fs37 Hz −23%, better
Qts0.36 −56%, better
Vas186 L +48%, worse
BL25.5 T·m +21%, better
Xmax8 mm –
Sensitivity96 dB +1.8
BishopSoundBWP18/4
£269.00Fs42 Hz −12%, better
Qts0.69 −15%, better
Vas110.1 L −13%, better
BL18.8 T·m −11%, worse
Xmax12 mm +50%, better
Sensitivity92.6 dB −1.6
BMS18S430V2
£316.72Fs31 Hz −35%, better
Qts0.34 −58%, better
Vas262 L +108%, worse
BL23.5 T·m +12%, better
Xmax8 mm –
Sensitivity95.4 dB +1.2
BMS18N830V2
£347.59Fs31 Hz −35%, better
Qts0.37 −54%, better
Vas262 L +108%, worse
BL22.4 T·m +7%
Xmax8 mm –
Sensitivity95 dB +0.8
Sica18 PF 4
£355.82Fs38 Hz −21%, better
Qts0.43 −47%, better
Vas147.3 L +17%, worse
BL24.6 T·m +17%, better
Xmax8 mm –
Sensitivity94.4 dB –
P.AudioP180/2242-V3
No current priceFs46 Hz −4%
Qts0.68 −16%, better
Vas131.4 L +4%
BL20.2 T·m −4%
Xmax6.8 mm −15%, worse
Sensitivity94.4 dB –
P.AudioC18-650EL-V4
No current priceFs35 Hz −27%, better
Qts0.68 −17%, better
Vas127.0 L –
BL22.1 T·m +5%
Xmax7 mm −13%, worse
Sensitivity90.9 dB −3.3, worse
P.AudioC18-1000-V3
No current priceFs41 Hz −15%, better
Qts0.72 −11%, better
Vas117.6 L −7%
BL22.9 T·m +9%
Xmax5.3 mm −34%, worse
Sensitivity92.3 dB −1.9
P.AudioP180/2243
No current priceFs35 Hz −27%, better
Qts0.59 −27%, better
Vas159.1 L +26%, worse
BL20.1 T·m −4%
Xmax8.5 mm +6%
Sensitivity92.2 dB −2, worse
BishopSoundBWP18/8/V2
No current priceFs43 Hz −11%, better
Qts0.64 −20%, better
Vas120.9 L −4%
BL24.1 T·m +15%, better
Xmax12 mm +50%, better
Sensitivity93.5 dB −0.7
P.Audio18BMA-1200S
No current priceFs39 Hz −19%, better
Qts0.52 −36%, better
Vas141.5 L +12%, worse
BL24 T·m +14%, better
Xmax6.8 mm −15%, worse
Sensitivity93.9 dB –
P.AudioIMF
No current priceFs33 Hz −31%, better
Qts0.50 −38%, better
Vas240.1 L +91%, worse
BL20.2 T·m −4%
Xmax7.5 mm −6%
Sensitivity93.7 dB −0.5
P.AudioC18-1200
No current priceFs38 Hz −21%, better
Qts0.55 −32%, better
Vas136.4 L +8%
BL25.1 T·m +19%, better
Xmax9.5 mm +19%, better
Sensitivity93.2 dB −1
Sica18 S 4 PL
No current priceFs36 Hz −25%, better
Qts0.39 −52%, better
Vas189 L +50%, worse
BL23.5 T·m +12%, better
Xmax8 mm –
Sensitivity95.3 dB +1.1
P.Audio18NT-100SW
No current priceFs35 Hz −27%, better
Qts0.48 −41%, better
Vas144.6 L +15%, worse
BL25.2 T·m +20%, better
Xmax9 mm +13%, better
Sensitivity93 dB −1.2
P.AudioGST-181500-V3
No current priceFs40 Hz −17%, better
Qts0.60 −26%, better
Vas92.2 L −27%, better
BL26.8 T·m +27%, better
Xmax9 mm +13%, better
Sensitivity91.7 dB −2.5, worse
Eighteen Sound18W1300
No current priceFs35 Hz −27%, better
Qts0.33 −59%, better
Vas336 L +167%, worse
BL20.4 T·m –
Xmax8.5 mm +6%
Sensitivity98.2 dB +4, better
CIARECSD184-22
No current priceFs37 Hz −23%, better
Qts0.53 −35%, better
Vas141 L +12%, worse
BL18.5 T·m −12%, worse
Xmax13 mm +63%, better
Sensitivity92.9 dB −1.3
PeerlessFSL-1830R03-08
No current priceFs32 Hz −33%, better
Qts0.36 −56%, better
Vas338 L +168%, worse
BL21.4 T·m –
Xmax8.7 mm +8%
Sensitivity96.8 dB +2.6, better
P.Audio18BM-1000S
No current priceFs35 Hz −27%, better
Qts0.40 −51%, better
Vas212.1 L +68%, worse
BL23.8 T·m +13%, better
Xmax8 mm –
Sensitivity95.3 dB +1.1
P.AudioC18-1000-V4
No current priceFs35 Hz −27%, better
Qts0.56 −31%, better
Vas183.7 L +46%, worse
BL22.5 T·m +7%
Xmax9.5 mm +19%, better
Sensitivity93.4 dB −0.8
FaneCOLOSSUS 18-800N
No current priceFs38 Hz −21%, better
Qts0.31 −62%, better
Vas217 L +72%, worse
BL24 T·m +14%, better
Xmax8 mm –
Sensitivity97.7 dB +3.5, better
CelestionCF1840H
No current priceFs39 Hz −20%, better
Qts0.35 −57%, better
Vas196.7 L +56%, worse
BL17.4 T·m −17%, worse
Xmax8 mm –
Sensitivity96.7 dB +2.5, better
No photo
PHL Audio7081
No current priceFs34 Hz −29%, better
Qts0.41 −49%, better
Vas267.6 L +112%, worse
BL22.7 T·m +8%
Xmax7.5 mm −6%
Sensitivity95.8 dB +1.6
Oberton18B450
No current priceFs34 Hz −28%, better
Qts0.34 −58%, better
Vas241.6 L +92%, worse
BL22.1 T·m +5%
Xmax7.3 mm −9%
Sensitivity96.4 dB +2.2, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
BishopSound | £145.00 | Out of stock | Visit shop at BishopSound |