B&C design · archived
F121AN
12"/1" 800W Full Range Enclosure - 12" Neo Woofer + 1" HF Neo Driver on 90°x40° Exponential Horn
- Drivers
- 12NDL76, 8 Ω
- Power
- 800 W
12-inch LF driver · 12NDL series · 76 mm voice coil · 400 W
B&C 12NDL76 8Ω
50–2000 Hz
- Fs
- 50Hz
- Xmax
- 7mm
- SPL
- 98dB
- Pe
- 400W
- BL
- 20.1T·m
- Vd
- 365cm³
- Qts
- 0.20
- Vas
- 73L
Published graphs
B&C 12NDL76 is a 12-inch 8 ohm LF driver rated at 400 W RMS. The validated T/S data includes Fs 50 Hz, Qts 0.20, Vas 73 L, Xmax 7 mm, sensitivity 98.4 dB, plus 365 cm³ Vd and 238 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 £167.22.
The published T/S values agree with each other
Thiele/Small
- Fs
- 50Hz
- Qts
- 0.20
- Qes
- 0.21
- Qms
- 4.2
- Vas
- 73L
- Re
- 5.3Ω
- Le
- 1mH
Motor and cone
- BL
- 20.1T·m
- Sd
- 522cm²
- Mms
- 53g
- Xmax
- 7mm
- Vd †
- 365cm³
- Voice coil
- 76mm
- Flux density
- 1.25T
Power and response
- Sensitivity †
- 98.4dB
- Manufacturer sensitivity
- 100dB
- Power
- 400W
- Nominal power
- 400W
- Impedance
- 8Ω
- Min. impedance
- 6.2Ω
- Range
- 50–2000Hz
- EBP †
- 238 · Leans vented
Size and mounting
- Diameter
- 315mm
- Cutout
- 283mm
- Bolt circle
- 298mm
- Depth
- 141mm
- Weight
- 3.9kg
Sensitivity shows 98.4 dB, calculated from the T/S values. B&C publishes 100.0 dB, 1.6 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 20.1T·m
- Fs
- 50Hz
- Le
- 1mH
- Re
- 5.3Ω
- Sd
- 522cm²
- Mms
- 53g
- Qes
- 0.21
- Qms
- 4.2
- Qts
- 0.20
- SPL
- 98.4dB
- Vas
- 73L
- Xmax
- 7mm
- Power
- 400W
- Impedance
- 8Ω
- Flux density
- 1.25T
- Sensitivity
- 100dB
- Low limit
- 50Hz
- Nominal power
- 400W
- Calculated sensitivity †
- 98.4dB
- High limit
- 2000Hz
- Manufacturer sensitivity
- 100dB
- Min. impedance
- 6.2Ω
- Voice coil
- 76mm
- Weight
- 3.9kg
- Diameter
- 315mm
- Depth
- 141mm
- Cutout
- 283mm
- Bolt circle
- 298mm
- Bl
- 20.1 Tm
- Fs
- 50 Hz
- Le
- 1 mH
- Re
- 5.3 Ω
- Sd
- 522 cm² (80.9 in²)
- Ebp
- 238 Hz
- Mms
- 53 g
- Qes
- 0.21
- Qms
- 4.2
- Qts
- 0.2
- Vas
- 73 dm³ (2.5 ft³)
- Η0
- 4.3 %
- Cone
- RCK12NDL768
- Xmax
- 7 mm
- Xvar
- 6.5 mm
- Depth
- 141 mm (5.5 in)
- Spider
- Single
- Cone shape
- Exponential
- Net weight
- 3.9 kg (8.6 lb)
- Pole design
- Straight Pole
- Sensitivity
- 100 dB
- Flux density
- 1.25 T
- Shipping box
- 360x360x200 mm (14.17x14.17x7.87 in)
- Winding depth
- 19 mm (0.75 in)
- Shipping units
- 1 pcs
- Surround shape
- Double Roll
- Former material
- Glass Fibre
- Frequency range
- 50 Hz - 2000 Hz
- Magnet material
- Neodymium Inside Slug
- Shipping weight
- 4.8 kg (10.58 lb)
- Nominal diameter
- 320 mm (12 in)
- Overall diameter
- 315 mm (12.4 in)
- Winding material
- Aluminium
- Minimum impedance
- 6.2 Ω
- Nominal impedance
- 8 Ω
- Magnetic gap depth
- 10 mm (0.4 in)
- Recommended tuning
- 65 Hz
- Voice coil diameter
- 76 mm (3 in)
- Bolt circle diameter
- 298 mm (11.7 in)
- Recommended enclosure
- 42 dm³ (1.48 ft³)
- Woofer cone treatment
- None
- Baffle cutout diameter
- 283 mm (11.1 in)
- Nominal power handling
- 400 W
- Continuous power handling
- 800 W
- Flange and gasket thickness
- 14 mm (0.55 in)
- Air volume occupied by driver
- 2.5 dm³ (0.08 ft³)
02
Designs
Cabinets for the 12NDL76: a design and a suggested box from B&C.
All 12NDL76 designsHow we find designsB&C’s design
From the maker, with plans to download
B&C’s suggested box
From B&C’s 12NDL76 page
- Net volume
- 42L
- 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…
03
Compare
Same-size drivers, compared with the 12NDL76. Clear differences are green when better and red when worse.
This driver12NDL76
Best price
£167.22
Fs
50 Hz
Qts
0.20
Vas
73 L
BL
20.1 T·m
Xmax
7 mm
Sensitivity
98.4 dB
Power
400 W
RCFLF12G301
£111.32 · 33% less, betterFs43 Hz −14%, better
Qts0.22 +10%
Vas97 L +33%, worse
BL19 T·m −5%
Xmax7 mm –
Sensitivity97.3 dB −1.1
B&C12CL76
£126.59 · 24% less, betterFs48 Hz −4%
Qts0.21 +5%
Vas59 L −19%, better
BL22.4 T·m +11%, better
Xmax6 mm −14%, worse
Sensitivity96.8 dB −1.6
B&C12MH32
£139.54 · 17% less, betterFs53 Hz +6%
Qts0.19 −5%
Vas63 L −14%, better
BL22.3 T·m +11%, better
Xmax5 mm −29%, worse
Sensitivity98.7 dB –
PRV Audio12MR1200X
£150.58 · 10% less, betterFs53 Hz +5%
Qts0.21 +5%
Vas71.8 L –
BL22 T·m +9%
Xmax4.5 mm −36%, worse
Sensitivity99 dB +0.6
Beyma12P80FE
£175.00 · 5% moreFs48 Hz −4%
Qts0.21 +5%
Vas61 L −16%, better
BL23 T·m +14%, better
Xmax7.5 mm +7%
Sensitivity96.9 dB −1.5
BMS12S320
£204.98 · 23% more, worseFs45 Hz −9%
Qts0.20 –
Vas69.5 L −5%
BL23.3 T·m +16%, better
Xmax4.5 mm −36%, worse
Sensitivity96.9 dB −1.5
RCFMB12N351
£225.00 · 35% more, worseFs55 Hz +10%, worse
Qts0.20 –
Vas61 L −16%, better
BL22.5 T·m +12%, better
Xmax6 mm −14%, worse
Sensitivity98.9 dB +0.5
Eighteen Sound12ND730
£230.40 · 38% more, worseFs45 Hz −10%, better
Qts0.23 +15%, worse
Vas90 L +23%, worse
BL19.2 T·m −4%
Xmax6.5 mm −7%
Sensitivity97.4 dB −1
Eighteen Sound12ND710
£243.61 · 46% more, worseFs52 Hz +4%
Qts0.20 –
Vas92 L +26%, worse
BL18 T·m −10%, worse
Xmax5 mm −29%, worse
Sensitivity100.1 dB +1.7
Eighteen Sound12ND930
£248.59 · 49% more, worseFs50 Hz –
Qts0.21 +5%
Vas70 L −4%
BL21.2 T·m +5%
Xmax6.5 mm −7%
Sensitivity98 dB –
Beyma12P80ND
£376.94 · 125% more, worseFs47 Hz −6%
Qts0.19 −5%
Vas65 L −11%, better
BL23.7 T·m +18%, better
Xmax7.5 mm +7%
Sensitivity97.3 dB −1.1
Oberton12NB450
No current priceFs46 Hz −7%
Qts0.20 –
Vas72.6 L –
BL20.3 T·m –
Xmax7.8 mm +11%, better
Sensitivity97.5 dB −0.9
Eighteen Sound12ND940
No current priceFs49 Hz –
Qts0.20 –
Vas64.8 L −11%, better
BL22.2 T·m +10%, better
Xmax7.6 mm +9%
Sensitivity97.8 dB −0.6
RCFMB12N405
No current priceFs52 Hz +4%
Qts0.20 –
Vas53 L −27%, better
BL23.5 T·m +17%, better
Xmax7 mm –
Sensitivity97.5 dB −0.9
Oberton12NXL400
No current priceFs49 Hz –
Qts0.20 –
Vas79.2 L +9%
BL20.6 T·m –
Xmax5.3 mm −25%, worse
Sensitivity98.5 dB –
Eighteen Sound12MB710
No current priceFs46 Hz −8%
Qts0.20 –
Vas81 L +11%, worse
BL20.5 T·m –
Xmax5 mm −29%, worse
Sensitivity98 dB –
Eighteen Sound12MB720
No current priceFs46 Hz −8%
Qts0.20 –
Vas81 L +11%, worse
BL20.5 T·m –
Xmax5 mm −29%, worse
Sensitivity98 dB –
Eighteen Sound12MB810
No current priceFs46 Hz −8%
Qts0.20 –
Vas81 L +11%, worse
BL20.5 T·m –
Xmax5 mm −29%, worse
Sensitivity98 dB –
RCFLF12G801
No current priceFs43 Hz −14%, better
Qts0.22 +10%
Vas97 L +33%, worse
BL19 T·m −5%
Xmax7 mm –
Sensitivity97.3 dB −1.1
RCFLF12P901
No current priceFs43 Hz −14%, better
Qts0.22 +10%
Vas97 L +33%, worse
BL19 T·m −5%
Xmax7 mm –
Sensitivity97.3 dB −1.1
No photo
PHL Audio4051
No current priceFs49 Hz –
Qts0.20 –
Vas85.2 L +17%, worse
BL20.9 T·m +4%
Xmax5 mm −29%, worse
Sensitivity98.8 dB –
RCFLF12P903
No current priceFs47 Hz −6%
Qts0.23 +15%, worse
Vas65 L −11%, better
BL22.1 T·m +10%, better
Xmax7 mm –
Sensitivity96.5 dB −1.9
Oberton12B450
No current priceFs46 Hz −7%
Qts0.23 +17%, worse
Vas71.8 L –
BL19.3 T·m −4%
Xmax7.8 mm +11%, better
Sensitivity96.7 dB −1.7
Oberton12B401
No current priceFs47 Hz −7%
Qts0.24 +22%, worse
Vas69.6 L −5%
BL19.9 T·m –
Xmax6.8 mm −4%
Sensitivity96.5 dB −1.9
No photo
PHL Audio4330NDU
No current priceFs36 Hz −28%, better
Qts0.22 +10%
Vas82.6 L +13%, worse
BL22 T·m +9%
Xmax8 mm +14%, better
Sensitivity94.3 dB −4.1, worse
Oberton12NB400
No current priceFs44 Hz −13%, better
Qts0.18 −10%, better
Vas70.5 L −3%
BL20.3 T·m –
Xmax5.3 mm −25%, worse
Sensitivity97.1 dB −1.3
LavoceCAN123.00T
No current priceFs46 Hz −8%
Qts0.22 +10%
Vas91 L +25%, worse
BL18.5 T·m −8%
Xmax6 mm −14%, worse
Sensitivity97.9 dB −0.5
LavoceCAN123.00TH
No current priceFs46 Hz −8%
Qts0.22 +10%
Vas91 L +25%, worse
BL18.5 T·m −8%
Xmax6 mm −14%, worse
Sensitivity97.9 dB −0.5
RCFCX12N351
No current priceFs58 Hz +16%, worse
Qts0.20 –
Vas47 L −36%, better
BL25 T·m +24%, better
Xmax6 mm −14%, worse
Sensitivity98.4 dB –
Sica12 F 4 CP
No current priceFs46 Hz −8%
Qts0.20 –
Vas52 L −29%, better
BL26.0 T·m +29%, better
Xmax6 mm −14%, worse
Sensitivity95.8 dB −2.6, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Thomann4.9 out of 57 ratings · Checked 7 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 |
|---|---|---|---|---|
Blue Aran | £169.00, the lowest price | 2 in stock | Visit shop at Blue Aran | |
Blue Aran | £169.00 | 5 in stock | Visit shop at Blue Aran | |
Thomann | £169.00 | In stock | Visit shop at Thomann | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £175.16 | 3.6% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure | £175.16 | 3.6% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £176.23 | 4.3% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £176.23 | 4.3% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure | £176.23 | 4.3% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure | £176.23 | 4.3% above the lowest price | In stock | Visit shop at JP Leisure |
Audio Video Parts Import VAT and duty may apply | £147.87 | Special order | Visit shop at Audio Video Parts |
Best price over time
Tracked since 1 Apr
Recent changes
- 4 OctThomann£175.00 → £169.00Down 3.4% from £175.00
- 26 SepThomann£169.00 → £175.00Up 3.6% from £169.00
- 17 JulBlue Aran£174.00 → £169.00Down 2.9% from £174.00