B&C design
U12
12"/1.4" 1400w Utility Box (active or passive)
- Drivers
- 1 × 12NDL88, 8 Ω
- Power
- 1,400 W
Designed with the 8 Ω version.
12-inch LF driver · 12NDL series · 88 mm voice coil · 700 W
B&C 12NDL88 4Ω
50–3000 Hz
£204.88
SteadyJP Leisure · In stock · All 6 offers
- Fs
- 48Hz
- Xmax
- 8mm
- SPL
- 96dB
- Pe
- 700W
- BL
- 16.6T·m
- Vd
- 418cm³
- Qts
- 0.24
- Vas
- 57L
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/v2
free-air SPL
Frequency response
240 plotted pointsSource file SHA-256 4bc1281c69fa…Medium confidence4,513 selected pixels of 4,603 - Trace datasheet-response-trace-poc/v2
free-air impedance
Impedance response
240 plotted pointsSource file SHA-256 4bc1281c69fa…Medium confidence2,913 selected pixels of 2,913
Published graphs
B&C 12NDL88 is a 12-inch 4 ohm LF driver rated at 700 W RMS. The validated T/S data includes Fs 48 Hz, Qts 0.24, Vas 57 L, Xmax 8 mm, sensitivity 96 dB, plus 418 cm³ Vd and 192 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 £204.88.
The published T/S values agree with each other
Thiele/Small
- Fs
- 48Hz
- Qts
- 0.24
- Qes
- 0.25
- Qms
- 6.8
- Vas
- 57L
- Re
- 3.1Ω
- Le
- 0.90mH
Motor and cone
- BL
- 16.6T·m
- Sd
- 522cm²
- Mms
- 74g
- Xmax
- 8mm
- Vd †
- 418cm³
- Voice coil
- 88mm
- Flux density
- 1.05T
Power and response
- Sensitivity †
- 96dB
- Manufacturer sensitivity
- 97dB
- Power
- 700W
- Nominal power
- 700W
- Impedance
- 4Ω
- Min. impedance
- 3.8Ω
- Range
- 50–3000Hz
- EBP †
- 192 · Leans vented
Size and mounting
- Diameter
- 315mm
- Cutout
- 282mm
- Bolt circle
- 298mm
- Depth
- 140mm
- Weight
- 5.0kg
Sensitivity shows 96.0 dB, calculated from the T/S values. B&C publishes 97.0 dB, 1.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 16.6T·m
- Fs
- 48Hz
- Le
- 0.90mH
- Re
- 3.1Ω
- Sd
- 522cm²
- Mms
- 74g
- Qes
- 0.25
- Qms
- 6.8
- Qts
- 0.24
- SPL
- 96dB
- Vas
- 57L
- Xmax
- 8mm
- Power
- 700W
- Impedance
- 4Ω
- Flux density
- 1.05T
- Sensitivity
- 97dB
- Low limit
- 50Hz
- Nominal power
- 700W
- Calculated sensitivity †
- 96dB
- High limit
- 3000Hz
- Manufacturer sensitivity
- 97dB
- Min. impedance
- 3.8Ω
- Voice coil
- 88mm
- Weight
- 5.0kg
- Diameter
- 315mm
- Depth
- 140mm
- Cutout
- 282mm
- Bolt circle
- 298mm
- Bl
- 16.6 Tm
- Fs
- 48 Hz
- Le
- 0.9 mH
- Re
- 3.1 Ω
- Sd
- 522 cm² (80.91 in²)
- Ebp
- 192 Hz
- Mms
- 73.6 g
- Qes
- 0.25
- Qms
- 6.8
- Qts
- 0.24
- Vas
- 57 dm³ (2.01 ft³)
- Η0
- 2.5 %
- Cone
- RCK12NDL884
- Xmax
- 8 mm
- Xvar
- 11 mm
- Depth
- 140 mm (5.51 in)
- Spider
- Double Silicone
- Cone shape
- Exponential
- Net weight
- 4.95 kg (10.91 lb)
- Pole design
- T-Pole
- Sensitivity
- 97 dB
- Flux density
- 1.05 T
- Shipping box
- 360x360x200 mm (14.17x14.17x7.87 in)
- Winding depth
- 21.5 mm (0.85 in)
- Shipping units
- 1 pcs
- Surround shape
- Triple Roll
- Former material
- Glass Fibre
- Frequency range
- 50 Hz - 3000 Hz
- Magnet material
- Neodymium Inside Slug
- Shipping weight
- 5.85 kg (12.9 lb)
- Nominal diameter
- 320 mm (12 in)
- Overall diameter
- 315 mm (12.4 in)
- Winding material
- Aluminium
- Minimum impedance
- 3.8 Ω
- Nominal impedance
- 4 Ω
- Magnetic gap depth
- 10 mm (0.39 in)
- Recommended tuning
- 65 Hz
- Voice coil diameter
- 88 mm (3.5 in)
- Bolt circle diameter
- 298 mm (11.73 in)
- Recommended enclosure
- 40 dm³ (1.41 ft³)
- Woofer cone treatment
- WP Waterproof Front Side
- Baffle cutout diameter
- 282 mm (11.1 in)
- Nominal power handling
- 700 W
- Continuous power handling
- 1400 W
- Flange and gasket thickness
- 13 mm (0.51 in)
- Air volume occupied by driver
- 2.5 dm³ (0.08 ft³)
02
Designs
Cabinets for the 12NDL88: a design and a suggested box from B&C, and plans builders have published.
All 12NDL88 designsHow we find designsB&C’s design
From the maker, with plans to download
B&C’s suggested box
From B&C’s 12NDL88 page
- Net volume
- 40L
- Tuning
- 65Hz
B&C gives the volume and tuning; the port is sized for the driver when you open it.
Modelling the box in 00 Simulator…
Plans from builders
Links to published plans that name this driver
A builder quotes it from the plans
03
Compare
Same-size drivers, compared with the 12NDL88. Clear differences are green when better and red when worse.
This driver12NDL88
Best price
£204.88
Fs
48 Hz
Qts
0.24
Vas
57 L
BL
16.6 T·m
Xmax
8 mm
Sensitivity
96 dB
Power
700 W
B&C12CLA76
£153.54 · 25% less, betterFs52 Hz +8%
Qts0.25 +4%
Vas56 L –
BL20.2 T·m +22%, better
Xmax5.3 mm −34%, worse
Sensitivity96.8 dB +0.8
LavoceWAN123.00
£163.28 · 20% less, betterFs49 Hz –
Qts0.27 +13%, worse
Vas68.8 L +21%, worse
BL17.9 T·m +8%
Xmax6.9 mm −14%, worse
Sensitivity96.6 dB +0.6
Eighteen Sound12W750
£168.92 · 18% less, betterFs55 Hz +15%, worse
Qts0.27 +13%, worse
Vas58 L –
BL15.5 T·m −7%
Xmax7 mm −13%, worse
Sensitivity97.4 dB +1.4
Beyma12MCB700
£174.16 · 15% less, betterFs51 Hz +6%
Qts0.27 +13%, worse
Vas59.5 L +4%
BL20.4 T·m +23%, better
Xmax7 mm −13%, worse
Sensitivity96.4 dB –
FaitalPRO12FH500
£175.71 · 14% less, betterFs45 Hz −6%
Qts0.22 −8%
Vas80.3 L +41%, worse
BL15.5 T·m −7%
Xmax7.3 mm −9%
Sensitivity97.1 dB +1.1
FaitalPRO12FH530
£177.40 · 13% less, betterFs45 Hz −6%
Qts0.26 +8%
Vas74.1 L +30%, worse
BL18.9 T·m +14%, better
Xmax7.5 mm −6%
Sensitivity96 dB –
RCFMB12N301
£183.23 · 11% less, betterFs54 Hz +13%, worse
Qts0.24 –
Vas71 L +25%, worse
BL19 T·m +14%, better
Xmax6 mm −25%, worse
Sensitivity98.4 dB +2.4, better
FaitalPRO12FH510
£188.44 · 8% less, betterFs45 Hz −6%
Qts0.25 +4%
Vas75.2 L +32%, worse
BL16.3 T·m –
Xmax7.5 mm −6%
Sensitivity96.2 dB –
FaitalPRO12FH520
£192.23 · 6% less, betterFs50 Hz +4%
Qts0.27 +13%, worse
Vas65.5 L +15%, worse
BL15.3 T·m −8%
Xmax7 mm −13%, worse
Sensitivity96.7 dB +0.7
BMS12S330
£204.98 · Same priceFs29 Hz −40%, better
Qts0.24 –
Vas85.5 L +50%, worse
BL23 T·m +39%, better
Xmax8 mm –
Sensitivity91.1 dB −4.9, worse
Beyma12MC700ND
£217.96 · 6% more, worseFs51 Hz +6%
Qts0.24 –
Vas58 L –
BL21.6 T·m +30%, better
Xmax7 mm −13%, worse
Sensitivity96.7 dB +0.7
BMS12C262
£228.36 · 11% more, worseFs47 Hz –
Qts0.24 –
Vas60.6 L +6%
BL20.6 T·m +24%, better
Xmax2.5 mm −69%, worse
Sensitivity96.1 dB –
Eighteen Sound12ND830
£243.61 · 19% more, worseFs58 Hz +21%, worse
Qts0.24 –
Vas63 L +11%, worse
BL13.7 T·m −17%, worse
Xmax6.5 mm −19%, worse
Sensitivity98.9 dB +2.9, better
Eighteen Sound12NLW9300
£274.84 · 34% more, worseFs47 Hz –
Qts0.42 +75%, worse
Vas56 L –
BL17 T·m –
Xmax8 mm –
Sensitivity93.1 dB −2.9, worse
Beyma12P1000ND
£305.27 · 49% more, worseFs47 Hz –
Qts0.26 +8%
Vas49 L −14%, better
BL23.5 T·m +42%, better
Xmax8 mm –
Sensitivity94.8 dB −1.2
Sica12 S 4 PL
£407.39 · 99% more, worseFs40 Hz −16%, better
Qts0.25 +4%
Vas57 L –
BL23.5 T·m +42%, better
Xmax7.5 mm −6%
Sensitivity93.6 dB −2.4, worse
Scanspeak32W/8878T11
£653.55 · 219% more, worseFs21 Hz −56%, better
Qts0.26 +8%
Vas235 L +312%, worse
BL16.5 T·m –
Xmax7.5 mm −6%
Sensitivity90.9 dB −5.1, worse
Oberton12B450
No current priceFs46 Hz −4%
Qts0.23 –
Vas71.8 L +26%, worse
BL19.3 T·m +16%, better
Xmax7.8 mm −3%
Sensitivity96.7 dB +0.7
No photo
PHL Audio4071-1
No current priceFs47 Hz –
Qts0.24 –
Vas57.8 L –
BL20.6 T·m +24%, better
Xmax6.5 mm −19%, worse
Sensitivity95.7 dB –
Oberton12B401
No current priceFs47 Hz –
Qts0.24 –
Vas69.6 L +22%, worse
BL19.9 T·m +20%, better
Xmax6.8 mm −16%, worse
Sensitivity96.5 dB +0.5
BMS12S302
No current priceFs45 Hz −6%
Qts0.25 +5%
Vas65 L +14%, worse
BL15.7 T·m −6%
Xmax4.5 mm −44%, worse
Sensitivity95.5 dB −0.5
RCFLF12P903
No current priceFs47 Hz –
Qts0.23 −4%
Vas65 L +14%, worse
BL22.1 T·m +33%, better
Xmax7 mm −13%, worse
Sensitivity96.5 dB +0.5
LavoceNBASS12-30
No current priceFs46 Hz −4%
Qts0.26 +8%
Vas68.6 L +20%, worse
BL19.5 T·m +18%, better
Xmax6.6 mm −18%, worse
Sensitivity96 dB –
Audio Technology12 D 77 25 10 KAP
No current priceFs19 Hz −60%, better
Qts0.25 +4%
Vas340 L +496%, worse
BL14 T·m −16%, worse
Xmax8.6 mm +7%
Sensitivity91.6 dB −4.4, worse
Sica12 PFS 4
No current priceFs39 Hz −19%, better
Qts0.26 +8%
Vas55.6 L –
BL23.9 T·m +44%, better
Xmax9 mm +13%, better
Sensitivity92.9 dB −3.1, worse
Oberton12L300
No current priceFs54 Hz +12%, worse
Qts0.25 +6%
Vas79.6 L +40%, worse
BL16.8 T·m –
Xmax3.3 mm −59%, worse
Sensitivity98.8 dB +2.8, better
Oberton12B400
No current priceFs50 Hz +5%
Qts0.25 +4%
Vas74.7 L +31%, worse
BL18.4 T·m +11%, better
Xmax5.3 mm −34%, worse
Sensitivity97.8 dB +1.8
Sica12 K 4 PL
No current priceFs49 Hz –
Qts0.25 +4%
Vas47.4 L −17%, better
BL22.9 T·m +38%, better
Xmax7 mm −13%, worse
Sensitivity95 dB −1
Oberton12MB35
No current priceFs51 Hz +7%
Qts0.27 +11%, worse
Vas50.1 L −12%, better
BL20.5 T·m +23%, better
Xmax6.8 mm −16%, worse
Sensitivity96 dB –
Sica12 SR 3 CP
No current priceFs37 Hz −23%, better
Qts0.40 +67%, worse
Vas60.9 L +7%
BL16.6 T·m –
Xmax8 mm –
Sensitivity90.3 dB −5.7, worse
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 |
|---|---|---|---|---|
JP Leisure | £204.88, the lowest price | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £204.88 | In stock | Visit shop at JP Leisure | |
Blue Aran | £221.00 | 7.9% above the lowest price | 3 in stock | Visit shop at Blue Aran |
Audio Video Parts Import VAT and duty may apply | £187.55 | Special order | Visit shop at Audio Video Parts |
Best price over time
Tracked since 1 Apr
Recent changes
- 17 JulBlue Aran£223.21 → £221.00Down 1.0% from £223.21
- 23 JunBlue Aran£217.60 → £223.21Up 2.6% from £217.60
- 5 JunBlue Aran£205.50 → £217.60Up 5.9% from £205.50