- Net volume
- 60L
- Tuning
- 75Hz
B&C gives the volume and tuning; the port is sized for the driver when you open it.
12-inch LF driver · 320K series · 38 mm voice coil · 120 W
B&C 320K/C-A 8Ω
80–16000 Hz
£107.29
SteadyJP Leisure · In stock · All 3 offers
- Fs
- 82Hz
- Xmax
- 2mm
- SPL
- 100dB
- Pe
- 120W
- BL
- 12.2T·m
- Vd
- 104cm³
- Qts
- 0.50
- Vas
- 53L
Published graphs
B&C 320K/C-A is a 12-inch 8 ohm LF driver rated at 120 W RMS. The validated T/S data includes Fs 82 Hz, Qts 0.50, Vas 53 L, Xmax 2 mm, sensitivity 99.5 dB, plus 104 cm³ Vd and 158 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 £107.29.
The published T/S values agree with each other
Thiele/Small
- Fs
- 82Hz
- Qts
- 0.50
- Qes
- 0.52
- Qms
- 13.3
- Vas
- 53L
- Re
- 5.4Ω
- Le
- 1.10mH
Motor and cone
- BL
- 12.2T·m
- Sd
- 522cm²
- Mms
- 27g
- Xmax
- 2mm
- Vd †
- 104cm³
- Voice coil
- 38mm
- Flux density
- 1.40T
Power and response
- Sensitivity †
- 99.5dB
- Manufacturer sensitivity
- 101dB
- Power
- 120W
- Nominal power
- 120W
- Impedance
- 8Ω
- Min. impedance
- 6.3Ω
- Range
- 80–16000Hz
- EBP †
- 158 · Leans vented
Size and mounting
- Diameter
- 316mm
- Cutout
- 286mm
- Bolt circle
- 298mm
- Depth
- 136mm
- Weight
- 4.6kg
Sensitivity shows 99.5 dB, calculated from the T/S values. B&C publishes 101.0 dB, 1.5 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 12.2T·m
- Fs
- 82Hz
- Le
- 1.10mH
- Re
- 5.4Ω
- Sd
- 522cm²
- Mms
- 27g
- Qes
- 0.52
- Qms
- 13.3
- Qts
- 0.50
- SPL
- 99.5dB
- Vas
- 53L
- Xmax
- 2mm
- Power
- 120W
- Impedance
- 8Ω
- Flux density
- 1.40T
- Sensitivity
- 101dB
- Low limit
- 80Hz
- Nominal power
- 120W
- Calculated sensitivity †
- 99.5dB
- High limit
- 16000Hz
- Manufacturer sensitivity
- 101dB
- Min. impedance
- 6.3Ω
- Voice coil
- 38mm
- Weight
- 4.6kg
- Diameter
- 316mm
- Depth
- 136mm
- Cutout
- 286mm
- Bolt circle
- 298mm
- Bl
- 12.2 Tm
- Fs
- 82 Hz
- Le
- 1.1 mH
- Re
- 5.4 Ω
- Sd
- 522 cm² (80.91 in²)
- Ebp
- 158 Hz
- Mms
- 27 g
- Qes
- 0.52
- Qms
- 13.3
- Qts
- 0.5
- Vas
- 53 dm³ (1.87 ft³)
- Η0
- 5.4 %
- Cone
- RCK320KC8A
- Xmax
- 2 mm
- Depth
- 136 mm (5.35 in)
- Spider
- Single
- Cone shape
- Radial
- Net weight
- 4.6 kg (10.14 lb)
- Pole design
- Straight Pole
- Sensitivity
- 101 dB
- Flux density
- 1.4 T
- Shipping box
- 360x360x200 mm (14.17x14.17x7.87 in)
- Winding depth
- 9 mm (0.37 in)
- Shipping units
- 1 pcs
- Surround shape
- Accordion
- Former material
- Kraft Paper
- Frequency range
- 80 Hz - 16000 Hz
- Magnet material
- Ferrite
- Shipping weight
- 5.5 kg (12.13 lb)
- Nominal diameter
- 320 mm (12 in)
- Overall diameter
- 316 mm (12.44 in)
- Winding material
- Copper
- Minimum impedance
- 6.3 Ω
- Nominal impedance
- 8 Ω
- Magnetic gap depth
- 9 mm (0.35 in)
- Recommended tuning
- 75 Hz
- Voice coil diameter
- 38 mm (1.5 in)
- Bolt circle diameter
- 298 mm (11.73 in)
- Recommended enclosure
- 60 dm³ (2.12 ft³)
- Woofer cone treatment
- None
- Baffle cutout diameter
- 286 mm (11.26 in)
- Nominal power handling
- 120 W
- Continuous power handling
- 240 W
- Flange and gasket thickness
- 12 mm (0.47 in)
- Air volume occupied by driver
- 3 dm³ (0.11 ft³)
B&C’s suggested box
From B&C’s 320K/C-A page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 320K/C-A. Clear differences are green when better and red when worse.
This driver320K/C-A
Best price
£107.29
Fs
82 Hz
Qts
0.50
Vas
53 L
BL
12.2 T·m
Xmax
2 mm
Sensitivity
99.5 dB
Power
120 W
REDCATT121FIND
£59.38 · 45% less, betterFs59 Hz −28%, better
Qts0.52 +4%
Vas59.1 L +12%, worse
BL10.2 T·m −16%, worse
Xmax1.9 mm −7%
Sensitivity95.4 dB −4.1, worse
PeerlessFSL-1220R02-08
£59.63 · 44% less, betterFs62 Hz −24%, better
Qts0.55 +10%, worse
Vas61.1 L +15%, worse
BL13.3 T·m +9%
Xmax5.1 mm +154%, better
Sensitivity96 dB −3.5, worse
FaitalPRO12FE300
£64.00 · 40% less, betterFs47 Hz −43%, better
Qts0.51 –
Vas83.7 L +58%, worse
BL12.5 T·m –
Xmax5.1 mm +154%, better
Sensitivity94.2 dB −5.3, worse
SB AudienceBIANCO-12MW200
£68.29 · 36% less, betterFs51 Hz −38%, better
Qts0.49 –
Vas62.9 L +19%, worse
BL14.7 T·m +20%, better
Xmax7.0 mm +249%, better
Sensitivity94.2 dB −5.3, worse
PeerlessFSL-1225R02-08
£72.31 · 33% less, betterFs63 Hz −23%, better
Qts0.44 −12%, better
Vas54.8 L +3%
BL14.9 T·m +22%, better
Xmax5.3 mm +163%, better
Sensitivity96.5 dB −3, worse
EminenceBETA 12CX
£95.30 · 11% less, betterFs47 Hz −43%, better
Qts0.48 −4%
Vas120.9 L +128%, worse
BL10.8 T·m −12%, worse
Xmax3.5 mm +75%, better
Sensitivity95.9 dB −3.6, worse
Beyma12BR70
£99.85 · 7% less, betterFs31 Hz −62%, better
Qts0.50 –
Vas142 L +168%, worse
BL12.1 T·m –
Xmax8 mm +300%, better
Sensitivity90.8 dB −8.7, worse
EminenceDELTA-12LFA
£105.00 · 2% lessFs51 Hz −38%, better
Qts0.47 −6%
Vas67.9 L +28%, worse
BL14.1 T·m +16%, better
Xmax4.8 mm +140%, better
Sensitivity94.5 dB −5, worse
EminenceDELTA-12LFC
£129.48 · 21% more, worseFs52 Hz −37%, better
Qts0.44 −12%, better
Vas63.7 L +20%, worse
BL10.9 T·m −11%, worse
Xmax4.8 mm +140%, better
Sensitivity94.8 dB −4.7, worse
EminenceBASSLITE S2012
£146.00 · 36% more, worseFs48 Hz −41%, better
Qts0.48 −4%
Vas90.6 L +71%, worse
BL11.7 T·m −4%
Xmax5.2 mm +160%, better
Sensitivity94.8 dB −4.7, worse
VisatonPAW 30 ND
£222.00 · 107% more, worseFs52 Hz −37%, better
Qts0.46 −8%
Vas55.4 L +5%
BL15.4 T·m +26%, better
Xmax9 mm +350%, better
Sensitivity93.9 dB −5.6, worse
SB AudienceROSSO-12CX350
£254.60 · 137% more, worseFs49 Hz −40%, better
Qts0.49 –
Vas90.4 L +71%, worse
BL12.1 T·m –
Xmax8.2 mm +310%, better
Sensitivity95.1 dB −4.4, worse
P.Audio12BMA-300B
No current priceFs61 Hz −26%, better
Qts0.49 –
Vas54.4 L –
BL13.7 T·m +12%, better
Xmax4 mm +100%, better
Sensitivity95.7 dB −3.8, worse
CelestionTF1218
No current priceFs59 Hz −28%, better
Qts0.52 +3%
Vas83.0 L +57%, worse
BL11.2 T·m −8%
Xmax2 mm –
Sensitivity96.5 dB −3, worse
CelestionTF1230
No current priceFs59 Hz −28%, better
Qts0.52 +3%
Vas51.1 L −4%
BL13.0 T·m +6%
Xmax5 mm +150%, better
Sensitivity94.1 dB −5.4, worse
P.AudioGST-12500-V3
No current priceFs56 Hz −32%, better
Qts0.48 −4%
Vas52.9 L –
BL15.7 T·m +29%, better
Xmax3.3 mm +63%, better
Sensitivity94.6 dB −4.9, worse
WavecorSW312WA03
No current priceFs28 Hz −66%, better
Qts0.48 −4%
Vas61 L +15%, worse
BL14.5 T·m +19%, better
Xmax11.5 mm +475%, better
Sensitivity86.3 dB −13.2, worse
WavecorSW312WA04
No current priceFs28 Hz −66%, better
Qts0.48 −4%
Vas61 L +15%, worse
BL14.5 T·m +19%, better
Xmax11.5 mm +475%, better
Sensitivity86.3 dB −13.2, worse
EminenceGUIT-FIDDLE
No current priceFs82 Hz –
Qts0.56 +12%, worse
Vas57.8 L +9%
BL13.1 T·m +7%
Xmax0.8 mm −61%, worse
Sensitivity99.4 dB –
VisatonPAW 30 ND - 8 OHM
No current priceFs52 Hz −37%, better
Qts0.46 −8%
Vas55.4 L +5%
BL15.4 T·m +26%, better
Xmax9 mm +350%, better
Sensitivity93.9 dB −5.6, worse
EminenceSWAMP THANG
No current priceFs97 Hz +18%, worse
Qts0.53 +6%
Vas41.3 L −22%, better
BL14.2 T·m +16%, better
Xmax0.8 mm −60%, worse
Sensitivity100.4 dB +0.9
LavoceFBASS12-20
No current priceFs53 Hz −35%, better
Qts0.46 −8%
Vas75.4 L +42%, worse
BL13.3 T·m +9%
Xmax4.3 mm +115%, better
Sensitivity95.5 dB −4, worse
Sica12 PFS 3
No current priceFs43 Hz −48%, better
Qts0.47 −6%
Vas58.5 L +10%, worse
BL15.9 T·m +30%, better
Xmax7 mm +250%, better
Sensitivity91.6 dB −7.9, worse
EminenceDELTALITE 2512
No current priceFs53 Hz −35%, better
Qts0.52 +4%
Vas67.4 L +27%, worse
BL11.6 T·m −5%
Xmax4.9 mm +145%, better
Sensitivity94 dB −5.5, worse
JensenJN12-100TR-8
No current priceFs72 Hz −12%, better
Qts0.52 +4%
Vas55.9 L +5%
BL12.9 T·m +6%
Xmax1 mm −50%, worse
Sensitivity98.5 dB −1
JensenJN12-100TRS-8
No current priceFs72 Hz −12%, better
Qts0.52 +4%
Vas55.9 L +5%
BL12.9 T·m +6%
Xmax1 mm −50%, worse
Sensitivity96.5 dB −3, worse
JensenJN12-80TRS-8
No current priceFs72 Hz −13%, better
Qts0.55 +10%, worse
Vas56.5 L +7%
BL12.2 T·m –
Xmax1 mm −50%, worse
Sensitivity96.7 dB −2.8, worse
Acoustic EleganceSBP12-8
No current priceFs24 Hz −71%, better
Qts0.48 −4%
Vas160 L +202%, worse
BL13.1 T·m +7%
Xmax14 mm +600%, better
Sensitivity87.9 dB −11.6, worse
P.AudioEX12-300S
No current priceFs66 Hz −20%, better
Qts0.54 +8%
Vas45.9 L −13%, better
BL13.7 T·m +13%, better
Xmax3.1 mm +55%, better
Sensitivity95.2 dB −4.3, worse
Acoustic EleganceIB12AU-8
No current priceFs24 Hz −71%, better
Qts0.51 –
Vas160 L +202%, worse
BL12.5 T·m –
Xmax18 mm +800%, better
Sensitivity87.8 dB −11.7, 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 | £107.29, the lowest price | In stock | Visit shop at JP Leisure | |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £107.29 | In stock | Visit shop at JP Leisure | |
Blue Aran 3-5 months | £109.99 | 2.5% above the lowest price | Usually available in 3-5 months | Visit shop at Blue Aran |
Best price over time
Tracked since 1 Apr
Recent changes
- 23 JunJP Leisure£79.03 → £107.29Up 36% from £79.03
- 23 JunBlue Aran£110.16 → £109.99Down 0.2% from £110.16
- 5 JunBlue Aran£74.68 → £110.16Up 48% from £74.68