12-inch LF driver · 900 W
Eighteen Sound 12LW1400 8Ω
8 Ω · 51–4000 Hz
- Fs
- 45Hz
- Xmax
- 8.3mm
- SPL
- 94dB
- Pe
- 900W
- BL
- 20T·m
- Vd
- 438cm³
- Qts
- 0.30
- Vas
- 55L
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
frequency response
Frequency response
240 plotted pointsMedium confidence2,357 selected pixels of 2,384 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence1,759 selected pixels of 1,810
Published graphs
Eighteen Sound 12LW1400 is a 12-inch 8 ohm LF driver rated at 900 W RMS. The validated T/S data includes Fs 45 Hz, Qts 0.30, Vas 55 L, Xmax 8.3 mm, sensitivity 94 dB, plus 438 cm³ Vd and 141 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 £260.72.
The published T/S values agree with each other
Thiele/Small
- Fs
- 45Hz
- Qts
- 0.30
- Qes
- 0.32
- Qms
- 5
- Vas
- 55L
- Re
- 5.2Ω
- Le
- 1.50mH
Motor and cone
- BL
- 20T·m
- Sd
- 531cm²
- Mms
- 88g
- Xmax
- 8.3mm
- Vd †
- 438cm³
Power and response
- Sensitivity †
- 94dB
- Manufacturer sensitivity
- 96dB
- Power
- 900W
- Nominal power
- 900W
- Impedance
- 8Ω
- Range
- 51–4000Hz
- EBP †
- 141 · Leans vented
Size and mounting
- Diameter
- 315mm
- Cutout
- 282mm
- Bolt circle
- 296mm
- Depth
- 141mm
- Weight
- 10.9kg
Other published values
- Power Program
- 1400
Sensitivity shows 94.0 dB, calculated from the T/S values. Eighteen Sound publishes 96.0 dB, 2.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Eighteen Sound lists
LF · Primary · 12″
- BL
- 20T·m
- Fs
- 45Hz
- Le
- 1.50mH
- Re
- 5.2Ω
- Sd
- 531cm²
- Mms
- 88g
- Qes
- 0.32
- Qms
- 5
- Qts
- 0.30
- SPL
- 94dB
- Vas
- 55L
- Xmax
- 8.3mm
- Power
- 900W
- Impedance
- 8Ω
- Sensitivity
- 96dB
- Low limit
- 51Hz
- Nominal power
- 900W
- Power Program
- 1400
- Calculated sensitivity †
- 94dB
- High limit
- 4000Hz
- Manufacturer sensitivity
- 96dB
- Weight
- 10.9kg
- Diameter
- 315mm
- Depth
- 141mm
- Cutout
- 282mm
- Bolt circle
- 296mm
02
Designs
Cabinets for the 12LW1400: a design and a suggested box from Eighteen Sound.
All 12LW1400 designsHow we find designsEighteen Sound’s design
From the maker, with plans to download
Eighteen Sound’s suggested box
From Eighteen Sound’s 12LW1400 page
- Net volume
- 50L
- Tuning
- 47Hz
Eighteen Sound gives the volume and tuning; the port is sized for the driver when you open it.
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 12LW1400. Clear differences are green when better and red when worse.
This driver12LW1400
Best price
£260.72
Fs
45 Hz
Qts
0.30
Vas
55 L
BL
20 T·m
Xmax
8.3 mm
Sensitivity
94 dB
Power
900 W
CIAREPWA12.75
£121.41 · 53% less, betterFs53 Hz +18%, worse
Qts0.30 –
Vas52 L −5%
BL19.6 T·m –
Xmax5.8 mm −30%, worse
Sensitivity95.9 dB +1.9
PRV Audio12MR2000
£142.06 · 46% less, betterFs57 Hz +27%, worse
Qts0.33 +10%, worse
Vas52.5 L −5%
BL21.3 T·m +6%
Xmax6.6 mm −20%, worse
Sensitivity96.6 dB +2.6, better
Beyma12MC500
£150.88 · 42% less, betterFs57 Hz +27%, worse
Qts0.34 +13%, worse
Vas57 L +4%
BL18.3 T·m −8%
Xmax8 mm −3%
Sensitivity96.8 dB +2.8, better
B&C12FW88
£163.69 · 37% less, betterFs53 Hz +18%, worse
Qts0.33 +10%, worse
Vas45.7 L −17%, better
BL19.5 T·m –
Xmax8 mm −3%
Sensitivity94.9 dB +0.9
Eighteen Sound12W750
£166.62 · 36% less, betterFs49 Hz +9%
Qts0.28 −7%
Vas73 L +33%, worse
BL18 T·m −10%, worse
Xmax8 mm −3%
Sensitivity96.6 dB +2.6, better
Beyma12MCB700
£174.16 · 33% less, betterFs51 Hz +13%, worse
Qts0.27 −10%
Vas59.5 L +8%
BL20.4 T·m –
Xmax7 mm −15%, worse
Sensitivity96.4 dB +2.4, better
Eighteen Sound12LW800
£189.95 · 27% less, betterFs52 Hz +16%, worse
Qts0.29 −3%
Vas48 L −13%, better
BL21.3 T·m +7%
Xmax6.5 mm −21%, worse
Sensitivity95.6 dB +1.6
FaitalPRO12HP1010
£191.59 · 27% less, betterFs45 Hz –
Qts0.34 +13%, worse
Vas56.5 L –
BL19.8 T·m –
Xmax9.3 mm +12%, better
Sensitivity93.7 dB –
B&C12PS100
£193.00 · 26% less, betterFs44 Hz –
Qts0.27 −10%
Vas47 L −15%, better
BL22.5 T·m +13%, better
Xmax8 mm −3%
Sensitivity93.4 dB −0.6
B&C12NDL88
£208.49 · 20% less, betterFs51 Hz +13%, worse
Qts0.27 −10%
Vas52 L −5%
BL19.9 T·m –
Xmax8 mm −3%
Sensitivity95.8 dB +1.8
Precision DevicesPD.124NR1
£219.00 · 16% less, betterFs58 Hz +29%, worse
Qts0.35 +17%, worse
Vas49 L −11%, better
BL19.2 T·m −4%
Xmax8.5 mm +3%
Sensitivity96.2 dB +2.2, better
Dayton AudioRSS315HO-4
£274.72 · 5% more, worseFs26 Hz −42%, better
Qts0.31 +3%
Vas53.7 L –
BL20 T·m –
Xmax12.3 mm +49%, better
Sensitivity86.7 dB −7.3, worse
Eighteen Sound12NTLW3500
£285.52 · 10% more, worseFs53 Hz +18%, worse
Qts0.33 +10%, worse
Vas45 L −18%, better
BL19.5 T·m –
Xmax8.3 mm –
Sensitivity94.8 dB +0.8
Sica12 PNS 4
£359.21 · 38% more, worseFs42 Hz −7%
Qts0.31 +3%
Vas50.2 L −9%
BL22.3 T·m +12%, better
Xmax9.5 mm +15%, better
Sensitivity92.6 dB −1.4
Eighteen Sound12NCX910
£436.54 · 67% more, worseFs57 Hz +27%, worse
Qts0.30 –
Vas58 L +5%
BL18.1 T·m −9%
Xmax6.9 mm −16%, worse
Sensitivity97.4 dB +3.4, better
Eighteen Sound12NCX910N
£478.98 · 84% more, worseFs57 Hz +27%, worse
Qts0.30 –
Vas58 L +5%
BL18.1 T·m −9%
Xmax6.9 mm −16%, worse
Sensitivity97.4 dB +3.4, better
BMS12N804
No current priceFs39 Hz −13%, better
Qts0.29 −3%
Vas71 L +29%, worse
BL20.4 T·m –
Xmax8 mm −3%
Sensitivity93.4 dB −0.6
Eighteen Sound12NCX910BE
No current priceFs57 Hz +27%, worse
Qts0.30 –
Vas58 L +5%
BL18.1 T·m −9%
Xmax6.9 mm −16%, worse
Sensitivity97.4 dB +3.4, better
CelestionTSQ1230
No current priceFs55 Hz +22%, worse
Qts0.30 –
Vas45.2 L −18%, better
BL20.5 T·m –
Xmax6.8 mm −18%, worse
Sensitivity95.8 dB +1.8
CelestionCF1230F
No current priceFs57 Hz +26%, worse
Qts0.32 +6%
Vas49.6 L −10%
BL18.3 T·m −8%
Xmax7.5 mm −9%
Sensitivity96.2 dB +2.2, better
Eighteen Sound12LW801
No current priceFs54 Hz +20%, worse
Qts0.33 +10%, worse
Vas41 L −25%, better
BL20.3 T·m –
Xmax8 mm −3%
Sensitivity94.8 dB +0.8
B&C12FL76
No current priceFs50 Hz +11%, worse
Qts0.30 –
Vas57 L +4%
BL18.7 T·m −7%
Xmax6 mm −27%, worse
Sensitivity95.5 dB +1.5
Eighteen Sound12NW350
No current priceFs54 Hz +20%, worse
Qts0.34 +13%, worse
Vas46 L −16%, better
BL19.2 T·m −4%
Xmax8.3 mm –
Sensitivity95.2 dB +1.2
Oberton12NB601
No current priceFs50 Hz +12%, worse
Qts0.30 –
Vas38.7 L −30%, better
BL22.9 T·m +15%, better
Xmax8.8 mm +6%
Sensitivity94 dB –
CelestionNTR12-3018D
No current priceFs59 Hz +31%, worse
Qts0.30 –
Vas50.4 L −8%
BL19.9 T·m –
Xmax4 mm −52%, worse
Sensitivity97 dB +3, better
CIARECSD124-22
No current priceFs34 Hz −24%, better
Qts0.30 –
Vas54 L –
BL18.2 T·m −9%
Xmax13 mm +58%, better
Sensitivity90.2 dB −3.8, worse
Sica12 SR 4 CP
No current priceFs38 Hz −16%, better
Qts0.30 –
Vas41.7 L −24%, better
BL24 T·m +20%, better
Xmax9 mm +9%
Sensitivity90.7 dB −3.3, worse
SB AcousticsWO34HC-8
No current priceFs20 Hz −55%, better
Qts0.29 −3%
Vas238 L +333%, worse
BL19 T·m −5%
Xmax8.3 mm –
Sensitivity90.2 dB −3.8, worse
No photo
PHL Audio4031
No current priceFs44 Hz –
Qts0.27 −10%
Vas70 L +27%, worse
BL20.5 T·m –
Xmax7.5 mm −9%
Sensitivity95.2 dB +1.2
No photo
PHL Audio4031NDU
No current priceFs44 Hz –
Qts0.27 −10%
Vas70 L +27%, worse
BL20.5 T·m –
Xmax7.5 mm −9%
Sensitivity95.2 dB +1.2
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 59 ratings · Checked 26 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 Business | £260.72, the lowest price | Stock not listed | Visit shop at Lean Business | |
Lean Audio | £260.72 | In stock | Visit shop at Lean Audio | |
Thomann | £299.00 | 15% above the lowest price | In stock | Visit shop at Thomann |
Best price over time
Tracked since 1 Apr
Recent changes
- 6 OctThomann£305.00 → £299.00Down 2.0% from £305.00
- 25 SepThomann£304.00 → £305.00Up 0.3% from £304.00
- 17 SepThomann£305.00 → £304.00Down 0.3% from £305.00