B&C design
U12
12"/1.4" 1400w Utility Box (active or passive)
- Drivers
- 1 × 12NDL88, 8 Ω
- Power
- 1,400 W
12-inch LF driver · 12NDL series · 88 mm voice coil · 700 W
B&C 12NDL88 8Ω
50–3000 Hz
£218.40
SteadyJP Leisure · In stock · All 13 offers
- Fs
- 51Hz
- Xmax
- 8mm
- SPL
- 96dB
- Pe
- 700W
- BL
- 19.9T·m
- Vd
- 418cm³
- Qts
- 0.27
- Vas
- 52L
Published graphs
B&C 12NDL88 is a 12-inch 8 ohm LF driver rated at 700 W RMS. The validated T/S data includes Fs 51 Hz, Qts 0.27, Vas 52 L, Xmax 8 mm, sensitivity 95.8 dB, plus 418 cm³ Vd and 176 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 £210.89.
The published T/S values agree with each other
Thiele/Small
- Fs
- 51Hz
- Qts
- 0.27
- Qes
- 0.29
- Qms
- 5
- Vas
- 52L
- Re
- 5Ω
- Le
- 1.30mH
Motor and cone
- BL
- 19.9T·m
- Sd
- 522cm²
- Mms
- 71g
- Xmax
- 8mm
- Vd †
- 418cm³
- Voice coil
- 88mm
- Flux density
- 1.05T
Power and response
- Sensitivity †
- 95.8dB
- Manufacturer sensitivity
- 98dB
- Power
- 700W
- Nominal power
- 700W
- Impedance
- 8Ω
- Min. impedance
- 6Ω
- Range
- 50–3000Hz
- EBP †
- 176 · Leans vented
Size and mounting
- Diameter
- 315mm
- Cutout
- 282mm
- Bolt circle
- 298mm
- Depth
- 140mm
- Weight
- 5.0kg
Sensitivity shows 95.8 dB, calculated from the T/S values. B&C publishes 98.0 dB, 2.2 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 19.9T·m
- Fs
- 51Hz
- Le
- 1.30mH
- Re
- 5Ω
- Sd
- 522cm²
- Mms
- 71g
- Qes
- 0.29
- Qms
- 5
- Qts
- 0.27
- SPL
- 95.8dB
- Vas
- 52L
- Xmax
- 8mm
- Power
- 700W
- Impedance
- 8Ω
- Flux density
- 1.05T
- Sensitivity
- 98dB
- Low limit
- 50Hz
- Nominal power
- 700W
- Calculated sensitivity †
- 95.8dB
- High limit
- 3000Hz
- Manufacturer sensitivity
- 98dB
- Min. impedance
- 6Ω
- Voice coil
- 88mm
- Weight
- 5.0kg
- Diameter
- 315mm
- Depth
- 140mm
- Cutout
- 282mm
- Bolt circle
- 298mm
- Bl
- 19.9 Tm
- Fs
- 51 Hz
- Le
- 1.3 mH
- Re
- 5 Ω
- Sd
- 522 cm² (80.9 in²)
- Ebp
- 176 Hz
- Mms
- 71 g
- Qes
- 0.29
- Qms
- 5
- Qts
- 0.27
- Vas
- 52 dm³ (1.84 ft³)
- Η0
- 2.3 %
- Cone
- RCK12NDL888
- Xmax
- 8 mm
- Xvar
- 9.5 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
- 98 dB
- Flux density
- 1.05 T
- Shipping box
- 360x360x200 mm (14.17x14.17x7.87 in)
- Winding depth
- 21 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
- 6 Ω
- Nominal impedance
- 8 Ω
- Magnetic gap depth
- 10 mm (0.4 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
£210.89
Fs
51 Hz
Qts
0.27
Vas
52 L
BL
19.9 T·m
Xmax
8 mm
Sensitivity
95.8 dB
Power
700 W
CIAREPWA12.75
£122.81 · 42% less, betterFs53 Hz +4%
Qts0.30 +11%, worse
Vas52 L –
BL19.6 T·m –
Xmax5.8 mm −28%, worse
Sensitivity95.9 dB –
LavoceWAN123.00
£163.28 · 23% less, betterFs49 Hz −4%
Qts0.27 –
Vas68.8 L +32%, worse
BL17.9 T·m −10%, worse
Xmax6.9 mm −14%, worse
Sensitivity96.6 dB +0.8
B&C12FW88
£163.69 · 22% less, betterFs53 Hz +4%
Qts0.33 +22%, worse
Vas45.7 L −12%, better
BL19.5 T·m –
Xmax8 mm –
Sensitivity94.9 dB −0.9
Eighteen Sound12W750
£168.54 · 20% less, betterFs49 Hz −4%
Qts0.28 +4%
Vas73 L +40%, worse
BL18 T·m −10%
Xmax8 mm –
Sensitivity96.6 dB +0.8
Beyma12MCB700
£174.16 · 17% less, betterFs51 Hz –
Qts0.27 –
Vas59.5 L +14%, worse
BL20.4 T·m –
Xmax7 mm −13%, worse
Sensitivity96.4 dB +0.6
FaitalPRO12FH530
£177.01 · 16% less, betterFs45 Hz −12%, better
Qts0.26 −4%
Vas74.1 L +42%, worse
BL18.9 T·m −5%
Xmax7.5 mm −6%
Sensitivity96 dB –
RCFMB12X351
£187.93 · 11% less, betterFs55 Hz +8%
Qts0.26 −4%
Vas46 L −12%, better
BL22.5 T·m +13%, better
Xmax7 mm −13%, worse
Sensitivity96.6 dB +0.8
B&C12PS100
£189.73 · 10% less, betterFs44 Hz −14%, better
Qts0.27 –
Vas47 L −10%
BL22.5 T·m +13%, better
Xmax8 mm –
Sensitivity93.4 dB −2.4, worse
Eighteen Sound12LW800
£189.95 · 10% less, betterFs52 Hz –
Qts0.29 +7%
Vas48 L −8%
BL21.3 T·m +7%
Xmax6.5 mm −19%, worse
Sensitivity95.6 dB –
Beyma12MC700ND
£217.96 · 3% moreFs51 Hz –
Qts0.24 −11%, better
Vas58 L +12%, worse
BL21.6 T·m +9%
Xmax7 mm −13%, worse
Sensitivity96.7 dB +0.9
FaitalPRO12HP1020
£235.45 · 12% more, worseFs55 Hz +8%
Qts0.27 –
Vas38.6 L −26%, better
BL24.3 T·m +22%, better
Xmax9 mm +13%, better
Sensitivity95.6 dB –
Eighteen Sound12LW1400
£260.72 · 24% more, worseFs45 Hz −12%, better
Qts0.30 +11%, worse
Vas55 L +6%
BL20 T·m –
Xmax8.3 mm +3%
Sensitivity94 dB −1.8
Beyma12P1000ND
£305.27 · 45% more, worseFs47 Hz −8%
Qts0.26 −4%
Vas49 L −6%
BL23.5 T·m +18%, better
Xmax8 mm –
Sensitivity94.8 dB −1
Eighteen Sound12NLW9410
£335.39 · 59% more, worseFs42 Hz −18%, better
Qts0.26 −4%
Vas55 L +6%
BL21.7 T·m +9%
Xmax11 mm +38%, better
Sensitivity93.8 dB −2, worse
Sica12 S 4 PL
£337.94 · 60% more, worseFs40 Hz −21%, better
Qts0.25 −7%
Vas57 L +10%
BL23.5 T·m +18%, better
Xmax7.5 mm −6%
Sensitivity93.6 dB −2.2, worse
BMS12CN680
£365.51 · 73% more, worseFs46 Hz −10%
Qts0.26 −4%
Vas58 L +12%, worse
BL20.6 T·m +4%
Xmax5.5 mm −31%, worse
Sensitivity95.2 dB −0.6
Eighteen Sound12NCX910
£436.54 · 107% more, worseFs57 Hz +12%, worse
Qts0.30 +11%, worse
Vas58 L +12%, worse
BL18.1 T·m −9%
Xmax6.9 mm −14%, worse
Sensitivity97.4 dB +1.6
Eighteen Sound12NCX910N
£478.98 · 127% more, worseFs57 Hz +12%, worse
Qts0.30 +11%, worse
Vas58 L +12%, worse
BL18.1 T·m −9%
Xmax6.9 mm −14%, worse
Sensitivity97.4 dB +1.6
Oberton12MB35
No current priceFs51 Hz –
Qts0.27 –
Vas50.1 L −4%
BL20.5 T·m +3%
Xmax6.8 mm −16%, worse
Sensitivity96 dB –
No photo
PHL Audio4031
No current priceFs44 Hz −14%, better
Qts0.27 –
Vas70 L +35%, worse
BL20.5 T·m +3%
Xmax7.5 mm −6%
Sensitivity95.2 dB −0.6
No photo
PHL Audio4031NDU
No current priceFs44 Hz −14%, better
Qts0.27 –
Vas70 L +35%, worse
BL20.5 T·m +3%
Xmax7.5 mm −6%
Sensitivity95.2 dB −0.6
BMS12N804
No current priceFs39 Hz −24%, better
Qts0.29 +7%
Vas71 L +37%, worse
BL20.4 T·m –
Xmax8 mm –
Sensitivity93.4 dB −2.4, worse
No photo
PHL Audio4310NDU
No current priceFs43 Hz −16%, better
Qts0.27 –
Vas56.7 L +9%
BL22 T·m +11%, better
Xmax10 mm +25%, better
Sensitivity94.1 dB −1.7
Sica12 PFS 4
No current priceFs39 Hz −24%, better
Qts0.26 −4%
Vas55.6 L +7%
BL23.9 T·m +20%, better
Xmax9 mm +13%, better
Sensitivity92.9 dB −2.9, worse
Sica12 K 4 PL
No current priceFs49 Hz −5%
Qts0.25 −7%
Vas47.4 L −9%
BL22.9 T·m +15%, better
Xmax7 mm −13%, worse
Sensitivity95 dB −0.8
LavoceNBASS12-30
No current priceFs46 Hz −10%
Qts0.26 −4%
Vas68.6 L +32%, worse
BL19.5 T·m –
Xmax6.6 mm −18%, worse
Sensitivity96 dB –
Eighteen Sound12NCX910BE
No current priceFs57 Hz +12%, worse
Qts0.30 +11%, worse
Vas58 L +12%, worse
BL18.1 T·m −9%
Xmax6.9 mm −14%, worse
Sensitivity97.4 dB +1.6
CelestionTSQ1230
No current priceFs55 Hz +8%
Qts0.30 +12%, worse
Vas45.2 L −13%, better
BL20.5 T·m +3%
Xmax6.8 mm −16%, worse
Sensitivity95.8 dB –
No photo
PHL Audio4071-1
No current priceFs47 Hz −8%
Qts0.24 −11%, better
Vas57.8 L +11%, worse
BL20.6 T·m +4%
Xmax6.5 mm −19%, worse
Sensitivity95.7 dB –
CelestionCF1230F
No current priceFs57 Hz +11%, worse
Qts0.32 +17%, worse
Vas49.6 L −5%
BL18.3 T·m −8%
Xmax7.5 mm −6%
Sensitivity96.2 dB –
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 51 rating · Checked 9 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 |
|---|---|---|---|---|
JP Leisure | £218.40, the lowest price | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £218.40 | In stock | Visit shop at JP Leisure | |
Thomann | £219.00 | 0.3% above the lowest price | In stock | Visit shop at Thomann |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £219.44 | 0.5% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure | £219.44 | 0.5% above the lowest price | In stock | Visit shop at JP Leisure |
Blue Aran | £221.00 | 1.2% above the lowest price | 7 in stock | Visit shop at Blue Aran |
Blue Aran 5-7 weeks | £221.00 | 1.2% above the lowest price | 1 in stock | Visit shop at Blue Aran |
Audio Video Parts Import VAT and duty may apply | £187.13 | Special order | Visit shop at Audio Video Parts | |
Parts Express Import VAT and duty may apply | £269.49 | 23% above the lowest price | 8 in stock | Visit shop at Parts Express |
Best price over time
Tracked since 1 Apr
Recent changes
- 4 OctThomann£222.00 → £219.00Down 1.4% from £222.00
- 1 AugThomann£221.00 → £222.00Up 0.5% from £221.00
- 17 JulBlue Aran£240.12 → £221.00Down 8.0% from £240.12