B&C design · archived
F121A
12"/1" 700W Full Range Enclosure - 12" Woofer + 1" HF Neo Driver on 90°x40° Exponential Horn
- Drivers
- 12PLB76, 8 Ω
- Power
- 700 W
12-inch LF driver · 12PLB series · 76 mm voice coil · 350 W
B&C 12PLB76 8Ω
8 Ω · 50–2000 Hz
£151.02
SteadyJP Leisure · In stock · All 10 offers
- Fs
- 50Hz
- Xmax
- 5mm
- SPL
- 98dB
- Pe
- 350W
- BL
- 18.6T·m
- Vd
- 261cm³
- Qts
- 0.23
- Vas
- 75L
Published graphs
B&C 12PLB76 is a 12-inch 8 ohm LF driver rated at 350 W RMS. The validated T/S data includes Fs 50 Hz, Qts 0.23, Vas 75 L, Xmax 5 mm, sensitivity 97.9 dB, plus 261 cm³ Vd and 208 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 £150.76.
The published T/S values agree with each other
Thiele/Small
- Fs
- 50Hz
- Qts
- 0.23
- Qes
- 0.24
- Qms
- 5.3
- Vas
- 75L
- Re
- 5Ω
- Le
- 1.20mH
Motor and cone
- BL
- 18.6T·m
- Sd
- 522cm²
- Mms
- 51g
- Xmax
- 5mm
- Vd †
- 261cm³
- Voice coil
- 76mm
- Flux density
- 1.05T
Power and response
- Sensitivity †
- 97.9dB
- Manufacturer sensitivity
- 99dB
- Power
- 350W
- Nominal power
- 350W
- Impedance
- 8Ω
- Min. impedance
- 6.4Ω
- Range
- 50–2000Hz
- EBP †
- 208 · Leans vented
Size and mounting
- Diameter
- 316mm
- Cutout
- 282mm
- Bolt circle
- 296mm
- Depth
- 136mm
- Weight
- 6.5kg
Sensitivity shows 97.9 dB, calculated from the T/S values. B&C publishes 99.0 dB, 1.1 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 18.6T·m
- Fs
- 50Hz
- Le
- 1.20mH
- Re
- 5Ω
- Sd
- 522cm²
- Mms
- 51g
- Qes
- 0.24
- Qms
- 5.3
- Qts
- 0.23
- SPL
- 97.9dB
- Vas
- 75L
- Xmax
- 5mm
- Power
- 350W
- Impedance
- 8Ω
- Flux density
- 1.05T
- Sensitivity
- 99dB
- Low limit
- 50Hz
- Nominal power
- 350W
- Calculated sensitivity †
- 97.9dB
- High limit
- 2000Hz
- Manufacturer sensitivity
- 99dB
- Min. impedance
- 6.4Ω
- Voice coil
- 76mm
- Weight
- 6.5kg
- Diameter
- 316mm
- Depth
- 136mm
- Cutout
- 282mm
- Bolt circle
- 296mm
- Bl
- 18.6 Tm
- Fs
- 50 Hz
- Le
- 1.2 mH
- Re
- 5 Ω
- Sd
- 522 cm² (80.9 in²)
- Ebp
- 208 Hz
- Mms
- 51 g
- Qes
- 0.24
- Qms
- 5.3
- Qts
- 0.23
- Vas
- 75 dm³ (2.6 ft³)
- Η0
- 3.8 %
- Cone
- RCK12PLB768
- Xmax
- 5 mm
- Xvar
- 7 mm
- Depth
- 136 mm (5.35 in)
- Spider
- Single
- Cone shape
- Exponential
- Net weight
- 6.55 kg (14.44 lb)
- Pole design
- T-Pole
- Sensitivity
- 99 dB
- Flux density
- 1.05 T
- Shipping box
- 360x360x200 mm (14.17x14.17x7.87 in)
- Winding depth
- 16 mm (0.62 in)
- Shipping units
- 1 pcs
- Surround shape
- Double Roll
- Former material
- Glass Fibre
- Frequency range
- 50 Hz - 2000 Hz
- Magnet material
- Ferrite
- Shipping weight
- 8.45 kg (18.63 lb)
- Nominal diameter
- 320 mm (12 in)
- Overall diameter
- 316 mm (12.4 in)
- Winding material
- Aluminium
- Minimum impedance
- 6.4 Ω
- Nominal impedance
- 8 Ω
- Magnetic gap depth
- 11 mm (0.4 in)
- Recommended tuning
- 65 Hz
- Voice coil diameter
- 76 mm (3 in)
- Bolt circle diameter
- 296 mm (11.6 in)
- Recommended enclosure
- 42 dm³ (1.48 ft³)
- Woofer cone treatment
- None
- Baffle cutout diameter
- 282 mm (11.1 in)
- Nominal power handling
- 350 W
- Continuous power handling
- 700 W
- Flange and gasket thickness
- 16 mm (0.62 in)
- Air volume occupied by driver
- 3.3 dm³ (0.12 ft³)
02
Designs
Cabinets for the 12PLB76: two designs and a suggested box from B&C.
All 12PLB76 designsHow we find designsB&C’s designs
From the maker, with plans to download
B&C design · archived
F122A
12"/1.4" 700W Full Range Enclosure - 12" Woofer + 1.4" HF Driver on 80°x60° CD Horn
- Drivers
- 12PLB76, 8 Ω
- Power
- 700 W
B&C’s suggested box
From B&C’s 12PLB76 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 12PLB76. Clear differences are green when better and red when worse.
This driver12PLB76
Best price
£150.76
Fs
50 Hz
Qts
0.23
Vas
75 L
BL
18.6 T·m
Xmax
5 mm
Sensitivity
97.9 dB
Power
350 W
RCFLF12G301
£111.08 · 26% less, betterFs43 Hz −14%, better
Qts0.22 −4%
Vas97 L +29%, worse
BL19 T·m –
Xmax7 mm +40%, better
Sensitivity97.3 dB −0.6
EminenceKAPPA PRO-12A
£132.50 · 12% less, betterFs37 Hz −26%, better
Qts0.24 +4%
Vas121 L +61%, worse
BL17.3 T·m −7%
Xmax4.8 mm −4%
Sensitivity95.9 dB −2, worse
PRV Audio12MR1200X
£151.37 · Same priceFs53 Hz +5%
Qts0.21 −9%
Vas71.8 L −4%
BL22 T·m +18%, better
Xmax4.5 mm −10%, worse
Sensitivity99 dB +1.1
B&C12CLA76
£153.30 · 2% moreFs52 Hz +4%
Qts0.25 +9%
Vas56 L −25%, better
BL20.2 T·m +9%
Xmax5.3 mm +6%
Sensitivity96.8 dB −1.1
FaitalPRO12FH510
£163.54 · 8% more, worseFs45 Hz −10%, better
Qts0.24 +4%
Vas81.3 L +8%
BL18.9 T·m –
Xmax7.5 mm +50%, better
Sensitivity96.7 dB −1.2
Precision DevicesPD.121/2
£169.00 · 12% more, worseFs53 Hz +7%
Qts0.23 –
Vas66.6 L −11%, better
BL21.5 T·m +15%, better
Xmax2.7 mm −46%, worse
Sensitivity98.4 dB +0.5
RCFMB12N301
£183.23 · 22% more, worseFs54 Hz +8%
Qts0.24 +4%
Vas71 L −5%
BL19 T·m –
Xmax6 mm +20%, better
Sensitivity98.4 dB +0.5
BMS12N610
£210.18 · 39% more, worseFs47 Hz −6%
Qts0.24 +4%
Vas70 L −7%
BL21 T·m +13%, better
Xmax3.5 mm −30%, worse
Sensitivity96.7 dB −1.2
Eighteen Sound12ND730
£230.40 · 53% more, worseFs45 Hz −10%, better
Qts0.23 –
Vas90 L +20%, worse
BL19.2 T·m +3%
Xmax6.5 mm +30%, better
Sensitivity97.4 dB −0.5
Eighteen Sound12MB650
£231.73 · 54% more, worseFs48 Hz −4%
Qts0.23 –
Vas90 L +20%, worse
BL19 T·m –
Xmax5.5 mm +10%, better
Sensitivity98.2 dB –
Eighteen Sound12ND710
£243.08 · 61% more, worseFs52 Hz +4%
Qts0.20 −13%, better
Vas92 L +23%, worse
BL18 T·m −3%
Xmax5 mm –
Sensitivity100.1 dB +2.2, better
BMS12N620
£247.26 · 64% more, worseFs45 Hz −11%, better
Qts0.25 +9%
Vas72.7 L −3%
BL20.6 T·m +11%, better
Xmax5.5 mm +10%, better
Sensitivity96 dB −1.9
BMS12N802
£271.01 · 80% more, worseFs43 Hz −14%, better
Qts0.24 +4%
Vas65 L −13%, better
BL22.3 T·m +20%, better
Xmax4.5 mm −10%, worse
Sensitivity95.2 dB −2.7, worse
BMS12N803
£285.67 · 89% more, worseFs41 Hz −18%, better
Qts0.24 +4%
Vas77 L –
BL21.4 T·m +15%, better
Xmax6 mm +20%, better
Sensitivity95.3 dB −2.6, worse
Oberton12B400
No current priceFs50 Hz –
Qts0.25 +8%
Vas74.7 L –
BL18.4 T·m –
Xmax5.3 mm +5%
Sensitivity97.8 dB –
Oberton12H4CX72
No current priceFs50 Hz –
Qts0.25 +10%
Vas74.7 L –
BL19.9 T·m +7%
Xmax4.5 mm −10%, worse
Sensitivity97.6 dB –
Oberton12B450
No current priceFs46 Hz −7%
Qts0.23 –
Vas71.8 L −4%
BL19.3 T·m +4%
Xmax7.8 mm +55%, better
Sensitivity96.7 dB −1.2
LavoceCAN123.00T
No current priceFs46 Hz −8%
Qts0.22 −4%
Vas91 L +21%, worse
BL18.5 T·m –
Xmax6 mm +20%, better
Sensitivity97.9 dB –
LavoceCAN123.00TH
No current priceFs46 Hz −8%
Qts0.22 −4%
Vas91 L +21%, worse
BL18.5 T·m –
Xmax6 mm +20%, better
Sensitivity97.9 dB –
Eighteen Sound12MB710
No current priceFs46 Hz −8%
Qts0.20 −13%, better
Vas81 L +8%
BL20.5 T·m +10%, better
Xmax5 mm –
Sensitivity98 dB –
Eighteen Sound12MB720
No current priceFs46 Hz −8%
Qts0.20 −13%, better
Vas81 L +8%
BL20.5 T·m +10%, better
Xmax5 mm –
Sensitivity98 dB –
Eighteen Sound12MB810
No current priceFs46 Hz −8%
Qts0.20 −13%, better
Vas81 L +8%
BL20.5 T·m +10%, better
Xmax5 mm –
Sensitivity98 dB –
Oberton12NXL400
No current priceFs49 Hz –
Qts0.20 −12%, better
Vas79.2 L +6%
BL20.6 T·m +11%, better
Xmax5.3 mm +5%
Sensitivity98.5 dB +0.6
No photo
PHL Audio4051
No current priceFs49 Hz –
Qts0.20 −13%, better
Vas85.2 L +14%, worse
BL20.9 T·m +12%, better
Xmax5 mm –
Sensitivity98.8 dB +0.9
BMS12S302
No current priceFs45 Hz −10%, better
Qts0.25 +10%
Vas65 L −13%, better
BL15.7 T·m −16%, worse
Xmax4.5 mm −10%, worse
Sensitivity95.5 dB −2.4, worse
Oberton12B401
No current priceFs47 Hz −7%
Qts0.24 +7%
Vas69.6 L −7%
BL19.9 T·m +7%
Xmax6.8 mm +35%, better
Sensitivity96.5 dB −1.4
Precision DevicesPD.124NR1-LR
No current priceFs45 Hz −10%, better
Qts0.23 –
Vas78 L +4%
BL22 T·m +18%, better
Xmax8.5 mm +70%, better
Sensitivity96.9 dB −1
RCFLF12P903
No current priceFs47 Hz −6%
Qts0.23 –
Vas65 L −13%, better
BL22.1 T·m +19%, better
Xmax7 mm +40%, better
Sensitivity96.5 dB −1.4
RCFLF12G801
No current priceFs43 Hz −14%, better
Qts0.22 −4%
Vas97 L +29%, worse
BL19 T·m –
Xmax7 mm +40%, better
Sensitivity97.3 dB −0.6
RCFLF12P901
No current priceFs43 Hz −14%, better
Qts0.22 −4%
Vas97 L +29%, worse
BL19 T·m –
Xmax7 mm +40%, better
Sensitivity97.3 dB −0.6
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Parts Express4.0 out of 51 rating · Checked 9 Oct 2026Read reviews on Parts Express
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 | £151.02, the lowest price | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £151.02 | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £151.02 | In stock | Visit shop at JP Leisure | |
JP Leisure | £151.02 | In stock | Visit shop at JP Leisure | |
Blue Aran | £160.74 | 6.4% above the lowest price | 2 in stock | Visit shop at Blue Aran |
Blue Aran 5-7 weeks | £160.74 | 6.4% above the lowest price | 15 in stock | Visit shop at Blue Aran |
Audio Video Parts Import VAT and duty may apply | £125.18 | Special order | Visit shop at Audio Video Parts | |
Parts Express Import VAT and duty may apply | £184.22 | 22% above the lowest price | 2 in stock | Visit shop at Parts Express |
Best price over time
Tracked since 1 Apr
Recent changes
- 23 JunJP Leisure£143.56 → £151.02Up 5.2% from £143.56
- 23 JunJP Leisure£144.53 → £151.02Up 4.5% from £144.53
- 23 JunBlue Aran£160.91 → £160.74Down 0.1% from £160.91