B&C12CL76
£127.32 · 35% less, betterFs48 Hz +71%, worse
Qts0.21 –
Vas59 L −60%, better
BL22.4 T·m –
Xmax6 mm −35%, worse
Sensitivity96.8 dB +3.1, better
12-inch LF driver · 400 W
Dayton Audio 12LF400-8 8Ω
8 Ω · 30–1500 Hz
£196.32
SteadySoundImports · 11 in stock · All 1 offer
- Fs
- 28Hz
- Xmax
- 9.3mm
- SPL
- 94dB
- Pe
- 400W
- BL
- 21.8T·m
- Vd
- 493cm³
- Qts
- 0.21
- Vas
- 148L
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 4 traces
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
30 degrees
Frequency response
240 plotted pointsMedium confidence1,746 selected pixels of 2,351 - Trace datasheet-response-trace-poc/v1
45 degrees
Frequency response
224 plotted pointsMedium confidence1,317 selected pixels of 2,260 - Trace datasheet-response-trace-poc/v1
on-axis
Frequency response
240 plotted pointsMedium confidence4,593 selected pixels of 4,593 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence2,396 selected pixels of 2,396
Dayton Audio 12LF400-8 is a 12-inch 8 ohm LF driver rated at 400 W RMS. The validated T/S data includes Fs 28 Hz, Qts 0.21, Vas 147.8 L, Xmax 9.3 mm, sensitivity 93.7 dB, plus 493 cm³ Vd and 127 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £196.32.
The published T/S values agree with each other
Thiele/Small
- Fs
- 28Hz
- Qts
- 0.21
- Qes
- 0.22
- Qms
- 5.2
- Vas
- 147.8L
- Re
- 6.7Ω
- Le
- 1.47mH
Motor and cone
- BL
- 21.8T·m
- Sd
- 533cm²
- Mms
- 88g
- Xmax
- 9.3mm
- Vd †
- 493cm³
Power and response
- Sensitivity †
- 93.7dB
- Manufacturer sensitivity
- 94.5dB
- Power
- 400W
- Impedance
- 8Ω
- Range
- 30–1500Hz
- EBP †
- 127 · Leans vented
Size and mounting
- Diameter
- 320mm
- Cutout
- 285mm
- Depth
- 152mm
- Weight
- 19.8kg
Other published values
- Cms
- 0.37mm/N
- Power Peak
- 800
† Calculated by bits from the published values
What this validation status means
Everything else Dayton Audio lists
LF · Primary · 12″
- BL
- 21.8T·m
- Fs
- 28Hz
- Le
- 1.47mH
- Re
- 6.7Ω
- Sd
- 533cm²
- Cms
- 0.37mm/N
- Mms
- 88g
- Qes
- 0.22
- Qms
- 5.2
- Qts
- 0.21
- SPL
- 93.7dB
- Vas
- 147.8L
- Xmax
- 9.3mm
- Power
- 400W
- Impedance
- 8Ω
- Power Peak
- 800
- Sensitivity
- 94.5dB
- Low limit
- 30Hz
- Calculated sensitivity †
- 93.7dB
- High limit
- 1500Hz
- Manufacturer sensitivity
- 94.5dB
- Weight
- 19.8kg
- Diameter
- 320mm
- Depth
- 152mm
- Cutout
- 285mm
02
Compare
Same-size drivers, compared with the 12LF400-8. Clear differences are green when better and red when worse.
This driver12LF400-8
Best price
£196.32
Fs
28 Hz
Qts
0.21
Vas
147.8 L
BL
21.8 T·m
Xmax
9.3 mm
Sensitivity
93.7 dB
Power
400 W
PRV Audio12MR1200X
£151.06 · 23% less, betterFs53 Hz +88%, worse
Qts0.21 –
Vas71.8 L −51%, better
BL22 T·m –
Xmax4.5 mm −51%, worse
Sensitivity99 dB +5.3, better
Beyma12MI100
£154.28 · 21% less, betterFs58 Hz +107%, worse
Qts0.22 +5%
Vas64 L −57%, better
BL21.6 T·m –
Xmax3 mm −68%, worse
Sensitivity99.4 dB +5.7, better
B&C12NDL76
£168.19 · 14% less, betterFs50 Hz +79%, worse
Qts0.20 −5%
Vas73 L −51%, better
BL20.1 T·m −8%
Xmax7 mm −24%, worse
Sensitivity98.4 dB +4.7, better
Beyma12P80FE
£175.00 · 11% less, betterFs48 Hz +71%, worse
Qts0.21 –
Vas61 L −59%, better
BL23 T·m +6%
Xmax7.5 mm −19%, worse
Sensitivity96.9 dB +3.2, better
BMS12S330
£204.98 · 4% moreFs29 Hz –
Qts0.24 +14%, worse
Vas85.5 L −42%, better
BL23 T·m +6%
Xmax8 mm −14%, worse
Sensitivity91.1 dB −2.6, worse
RCFMB12N351
£225.00 · 15% more, worseFs55 Hz +96%, worse
Qts0.20 −5%
Vas61 L −59%, better
BL22.5 T·m +3%
Xmax6 mm −35%, worse
Sensitivity98.9 dB +5.2, better
B&C12NBX100
£247.00 · 26% more, worseFs41 Hz +46%, worse
Qts0.22 +5%
Vas51 L −65%, better
BL25.6 T·m +17%, better
Xmax10 mm +8%
Sensitivity93.7 dB –
Eighteen Sound12ND930
£248.59 · 27% more, worseFs50 Hz +79%, worse
Qts0.21 –
Vas70 L −53%, better
BL21.2 T·m –
Xmax6.5 mm −30%, worse
Sensitivity98 dB +4.3, better
B&C12NW100
£254.42 · 30% more, worseFs42 Hz +50%, worse
Qts0.20 −5%
Vas44 L −70%, better
BL28 T·m +28%, better
Xmax9 mm –
Sensitivity93.9 dB –
B&C12CXN88
£465.46 · 137% more, worseFs50 Hz +79%, worse
Qts0.22 +5%
Vas59 L −60%, better
BL20.9 T·m −4%
Xmax10.5 mm +14%, better
Sensitivity97.1 dB +3.4, better
Beyma12XA30ND
£503.67 · 157% more, worseFs35 Hz +25%, worse
Qts0.21 –
Vas172 L +16%, worse
BL15.3 T·m −30%, worse
Xmax4 mm −57%, worse
Sensitivity97.3 dB +3.6, better
Scanspeak32W/4878T11
£657.35 · 235% more, worseFs24 Hz −14%, better
Qts0.21 –
Vas185 L +25%, worse
BL14 T·m −36%, worse
Xmax7 mm −24%, worse
Sensitivity92.7 dB −1
No photo
PHL Audio4330NDU
No current priceFs36 Hz +29%, worse
Qts0.22 +5%
Vas82.6 L −44%, better
BL22 T·m –
Xmax8 mm −14%, worse
Sensitivity94.3 dB +0.6
Precision DevicesPD.124NR1-LR
No current priceFs45 Hz +61%, worse
Qts0.23 +7%
Vas78 L −47%, better
BL22 T·m –
Xmax8.5 mm −8%
Sensitivity96.9 dB +3.2, better
Oberton12NB450
No current priceFs46 Hz +66%, worse
Qts0.20 –
Vas72.6 L −51%, better
BL20.3 T·m −7%
Xmax7.8 mm −16%, worse
Sensitivity97.5 dB +3.8, better
Eighteen Sound12ND940
No current priceFs49 Hz +75%, worse
Qts0.20 −5%
Vas64.8 L −56%, better
BL22.2 T·m –
Xmax7.6 mm −18%, worse
Sensitivity97.8 dB +4.1, better
RCFLF12G301
No current priceFs43 Hz +54%, worse
Qts0.22 +5%
Vas97 L −34%, better
BL19 T·m −13%, worse
Xmax7 mm −24%, worse
Sensitivity97.3 dB +3.6, better
RCFLF12G801
No current priceFs43 Hz +54%, worse
Qts0.22 +5%
Vas97 L −34%, better
BL19 T·m −13%, worse
Xmax7 mm −24%, worse
Sensitivity97.3 dB +3.6, better
RCFLF12P901
No current priceFs43 Hz +54%, worse
Qts0.22 +5%
Vas97 L −34%, better
BL19 T·m −13%, worse
Xmax7 mm −24%, worse
Sensitivity97.3 dB +3.6, better
Supravox285-2000 MK2
No current priceFs47 Hz +68%, worse
Qts0.21 –
Vas159 L +8%
BL13.3 T·m −39%, worse
Xmax3.5 mm −62%, worse
Sensitivity100.8 dB +7.1, better
No photo
PHL Audio4051
No current priceFs49 Hz +75%, worse
Qts0.20 −5%
Vas85.2 L −42%, better
BL20.9 T·m −4%
Xmax5 mm −46%, worse
Sensitivity98.8 dB +5.1, better
Acoustic EleganceTD12H-8
No current priceFs27 Hz −5%
Qts0.23 +10%
Vas160 L +8%
BL19.7 T·m −10%
Xmax14 mm +51%, better
Sensitivity92.9 dB −0.8
Oberton12NXL400
No current priceFs49 Hz +74%, worse
Qts0.20 −3%
Vas79.2 L −46%, better
BL20.6 T·m −6%
Xmax5.3 mm −43%, worse
Sensitivity98.5 dB +4.8, better
Precision DevicesPD.1225C001
No current priceFs39 Hz +39%, worse
Qts0.19 −10%
Vas156 L +6%
BL17.5 T·m −20%, worse
Xmax5.6 mm −39%, worse
Sensitivity98.8 dB +5.1, better
RCFMB12N405
No current priceFs52 Hz +86%, worse
Qts0.20 −5%
Vas53 L −64%, better
BL23.5 T·m +8%
Xmax7 mm −24%, worse
Sensitivity97.5 dB +3.8, better
Eighteen Sound12MB710
No current priceFs46 Hz +64%, worse
Qts0.20 −5%
Vas81 L −45%, better
BL20.5 T·m −6%
Xmax5 mm −46%, worse
Sensitivity98 dB +4.3, better
Eighteen Sound12MB720
No current priceFs46 Hz +64%, worse
Qts0.20 −5%
Vas81 L −45%, better
BL20.5 T·m −6%
Xmax5 mm −46%, worse
Sensitivity98 dB +4.3, better
Eighteen Sound12MB810
No current priceFs46 Hz +64%, worse
Qts0.20 −5%
Vas81 L −45%, better
BL20.5 T·m −6%
Xmax5 mm −46%, worse
Sensitivity98 dB +4.3, better
LavoceCAN123.00T
No current priceFs46 Hz +64%, worse
Qts0.22 +5%
Vas91 L −38%, better
BL18.5 T·m −15%, worse
Xmax6 mm −35%, worse
Sensitivity97.9 dB +4.2, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.0 out of 51 rating · Checked 2 Oct 2026Read reviews on SoundImports
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
SoundImports | £196.32, the lowest price | 11 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr