- Net volume
- 220L
- Tuning
- 35Hz
Eighteen Sound gives the volume and tuning; the port is sized for the driver when you open it.
18-inch LF driver · 1,200 W
Eighteen Sound 18NLW9400 8Ω
30–2500 Hz
£368.03
SteadyLean Audio · 2 in stock · All 4 offers
- Fs
- 33Hz
- Xmax
- 9.5mm
- SPL
- 97dB
- Pe
- 1200W
- BL
- 26T·m
- Vd
- 1164cm³
- Qts
- 0.26
- Vas
- 268L
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
impedance
Impedance response
214 plotted pointsMedium confidence439 selected pixels of 439
Published graphs
Eighteen Sound 18NLW9400 is an 18-inch 8 ohm LF driver rated at 1200 W RMS. The validated T/S data includes Fs 33 Hz, Qts 0.26, Vas 268 L, Xmax 9.5 mm, sensitivity 97.4 dB, plus 1164 cm³ Vd and 118 EBP. bits tracks UK, EU and US shop prices, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £305.62.
The published T/S values agree with each other
Thiele/Small
- Fs
- 33Hz
- Qts
- 0.26
- Qes
- 0.28
- Qms
- 6.1
- Vas
- 268L
- Re
- 5Ω
- Le
- 1.90mH
Motor and cone
- BL
- 26T·m
- Sd
- 1225cm²
- Mms
- 180g
- Xmax
- 9.5mm
- Vd †
- 1164cm³
Power and response
- Sensitivity †
- 97.4dB
- Manufacturer sensitivity
- 98dB
- Power
- 1200W
- Nominal power
- 1200W
- Impedance
- 8Ω
- Range
- 30–2500Hz
- EBP †
- 118 · Leans vented
Size and mounting
- Diameter
- 462mm
- Cutout
- 416mm
- Bolt circle
- 438mm
- Depth
- 223mm
- Weight
- 8.7kg
Other published values
- Power Program
- 2400
† Calculated by bits from the published values
What this validation status means
Everything else Eighteen Sound lists
LF · Primary · 18″
- BL
- 26T·m
- Fs
- 33Hz
- Le
- 1.90mH
- Re
- 5Ω
- Sd
- 1225cm²
- Mms
- 180g
- Qes
- 0.28
- Qms
- 6.1
- Qts
- 0.26
- SPL
- 97.4dB
- Vas
- 268L
- Xmax
- 9.5mm
- Power
- 1200W
- Impedance
- 8Ω
- Sensitivity
- 98dB
- Low limit
- 30Hz
- Nominal power
- 1200W
- Power Program
- 2400
- Calculated sensitivity †
- 97.4dB
- High limit
- 2500Hz
- Manufacturer sensitivity
- 98dB
- Weight
- 8.7kg
- Diameter
- 462mm
- Depth
- 223mm
- Cutout
- 416mm
- Bolt circle
- 438mm
02
Designs
Cabinets for the 18NLW9400: a suggested box from Eighteen Sound and plans builders have published.
All 18NLW9400 designsHow we find designsEighteen Sound’s suggested box
From Eighteen Sound’s 18NLW9400 page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
Plans from builders
Links to published plans that name this driver
The designer suggests it for 1,000–1,500 W per driver
03
Compare
Same-size drivers, compared with the 18NLW9400. Clear differences are green when better and red when worse.
This driver18NLW9400
Best price
£305.62
Fs
33 Hz
Qts
0.26
Vas
268 L
BL
26 T·m
Xmax
9.5 mm
Sensitivity
97.4 dB
Power
1200 W
B&C18PS76
£163.07 · 47% less, betterFs39 Hz +18%, worse
Qts0.27 +4%
Vas207 L −23%, better
BL25.8 T·m –
Xmax7 mm −26%, worse
Sensitivity98.3 dB +0.9
B&C18NW100
£234.88 · 23% less, betterFs31 Hz −6%
Qts0.26 –
Vas252 L −6%
BL28 T·m +8%
Xmax9 mm −5%
Sensitivity96.5 dB −0.9
B&C18PZB100
£235.00 · 23% less, betterFs30 Hz −9%
Qts0.24 −8%
Vas297 L +11%, worse
BL26 T·m –
Xmax8 mm −16%, worse
Sensitivity97.1 dB –
B&C18TBX100
£235.28 · 23% less, betterFs30 Hz −9%
Qts0.31 +19%, worse
Vas256 L −4%
BL22 T·m −15%, worse
Xmax9 mm −5%
Sensitivity95.2 dB −2.2, worse
RCFLF18G401
£252.42 · 17% less, betterFs33 Hz –
Qts0.29 +12%, worse
Vas268 L –
BL24.6 T·m −5%
Xmax9 mm −5%
Sensitivity97.1 dB –
Eighteen Sound18W1001
£254.65 · 17% less, betterFs35 Hz +6%
Qts0.23 −12%, better
Vas268 L –
BL27.6 T·m +6%
Xmax7 mm −26%, worse
Sensitivity98.8 dB +1.4
FaitalPRO18HP1022
£266.26 · 13% less, betterFs35 Hz +6%
Qts0.30 +15%, worse
Vas204.9 L −24%, better
BL28 T·m +8%
Xmax9.5 mm –
Sensitivity96.6 dB −0.8
Eighteen Sound18LW2400
£272.63 · 11% less, betterFs35 Hz +6%
Qts0.31 +19%, worse
Vas230 L −14%, better
BL25.6 T·m –
Xmax9.5 mm –
Sensitivity96.9 dB −0.5
Beyma18PW1400FE
£273.68 · 10% less, betterFs32 Hz −3%
Qts0.27 +4%
Vas228.9 L −15%, better
BL29 T·m +12%, better
Xmax10 mm +5%
Sensitivity96.3 dB −1.1
Eighteen Sound18LW1400
£274.64 · 10% less, betterFs31 Hz −6%
Qts0.29 +12%, worse
Vas297 L +11%, worse
BL24.7 T·m −5%
Xmax9 mm −5%
Sensitivity96.6 dB −0.8
Eighteen Sound18LW2420
£279.00 · 9% less, betterFs32 Hz −3%
Qts0.33 +27%, worse
Vas252 L −6%
BL25.3 T·m –
Xmax10 mm +5%
Sensitivity95.8 dB −1.6
RCFL18P400
£289.00 · 5% less, betterFs29 Hz −12%, better
Qts0.28 +8%
Vas340 L +27%, worse
BL24.6 T·m −5%
Xmax9 mm −5%
Sensitivity96.6 dB −0.8
RCFLF18X401
£289.00 · 5% less, betterFs30 Hz −9%
Qts0.30 +15%, worse
Vas274 L –
BL26.5 T·m –
Xmax12 mm +26%, better
Sensitivity95.8 dB −1.6
REDCATT18NPW
£347.48 · 14% more, worseFs36 Hz +9%
Qts0.28 +7%
Vas211.5 L −21%, better
BL27.3 T·m +5%
Xmax4.8 mm −49%, worse
Sensitivity97.5 dB –
RCFLF18N401
£359.21 · 18% more, worseFs32 Hz −3%
Qts0.26 –
Vas257 L −4%
BL27.8 T·m +7%
Xmax9 mm −5%
Sensitivity97 dB –
RCFLF18N451
£375.00 · 23% more, worseFs31 Hz −6%
Qts0.24 −8%
Vas245 L −9%
BL30.2 T·m +16%, better
Xmax9 mm −5%
Sensitivity96.7 dB −0.7
Oberton18XB1600V2
£388.58 · 27% more, worseFs33 Hz –
Qts0.28 +7%
Vas267 L –
BL29.6 T·m +14%, better
Xmax12.5 mm +32%, better
Sensitivity97.1 dB –
FaitalPRO18XL2000
£420.00 · 37% more, worseFs28 Hz −15%, better
Qts0.27 +4%
Vas232.1 L −13%, better
BL30.8 T·m +18%, better
Xmax16.3 mm +72%, better
Sensitivity94.6 dB −2.8, worse
Eighteen Sound18LW1251
No current priceFs35 Hz +6%
Qts0.27 +4%
Vas268 L –
BL23.6 T·m −9%
Xmax9 mm −5%
Sensitivity98.2 dB +0.8
Oberton18B500
No current priceFs35 Hz +6%
Qts0.28 +6%
Vas243.9 L −9%
BL24.1 T·m −7%
Xmax8.8 mm −8%
Sensitivity97.7 dB –
RCFLF18G908
No current priceFs33 Hz –
Qts0.29 +12%, worse
Vas268 L –
BL24.6 T·m −5%
Xmax9 mm −5%
Sensitivity97.1 dB –
Oberton18FBR700
No current priceFs36 Hz +8%
Qts0.27 +4%
Vas231.3 L −14%, better
BL25.2 T·m −3%
Xmax8 mm −16%, worse
Sensitivity97.8 dB –
CIAREPW455
No current priceFs36 Hz +9%
Qts0.24 −8%
Vas274 L –
BL26.2 T·m –
Xmax7.5 mm −21%, worse
Sensitivity99.3 dB +1.9
Eighteen Sound18W2001
No current priceFs37 Hz +12%, worse
Qts0.25 −4%
Vas230 L −14%, better
BL27.1 T·m +4%
Xmax7 mm −26%, worse
Sensitivity98.5 dB +1.1
Eighteen Sound18W2000
No current priceFs37 Hz +12%, worse
Qts0.25 −4%
Vas230 L −14%, better
BL27.1 T·m +4%
Xmax–
Sensitivity98.5 dB +1.1
Oberton18XB700
No current priceFs36 Hz +9%
Qts0.30 +17%, worse
Vas183.2 L −32%, better
BL26.1 T·m –
Xmax9 mm −5%
Sensitivity96.4 dB −1
No photo
RCFLF18Y402
No current priceFs30 Hz −9%
Qts0.30 +15%, worse
Vas274 L –
BL26.5 T·m –
Xmax12 mm +26%, better
Sensitivity95.8 dB −1.6
Oberton18NSW700
No current priceFs30 Hz −8%
Qts0.24 −7%
Vas309.0 L +15%, worse
BL26.6 T·m –
Xmax14 mm +47%, better
Sensitivity97.5 dB –
Radian Audio2218NEO-8
No current priceFs30 Hz −9%
Qts0.23 −12%, better
Vas312 L +16%, worse
BL33 T·m +27%, better
Xmax9 mm −5%
Sensitivity97.3 dB –
Precision DevicesPD.184NR1
No current priceFs38 Hz +15%, worse
Qts0.27 +4%
Vas102 L −62%, better
BL29.5 T·m +13%, better
Xmax8.5 mm −11%, worse
Sensitivity94.9 dB −2.5, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Thomann5.0 out of 55 ratings · Checked 25 Oct 2026Read reviews on Thomann
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Lean Audio | £368.03, the lowest price | 2 in stock | Visit shop at Lean Audio | |
Thomann usually 2-5 days | £444.00 | 21% above the lowest price | Out of stock | Visit shop at Thomann |
Best price over time
Tracked since 1 Apr