B&C Speaker 8CX21
Coaxial
8″ / 210 mm
Nominal diameter
74 Hz
Resonance
0.36
Q factor
93 dB
Sensitivity
± 5 mm
Linear excursion
400 W
Program Power
![B&C Speaker 8CX21 Coaxial](/BC/8CX21/BC_8CX21_(Photo_1).png)
![B&C Speaker 8CX21 Coaxial](/BC/8CX21/BC_8CX21_(Photo_2).png)
- Parts Express
- $$$
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 93.4
- dB
- Frequency response
- 75 - 20000
- Hz
- Resonance frequency (free air)
- fS
- 74.0
- Hz
- Mechanical quality factor
- QMS
- 4.10
- Electrical quality factor
- QES
- 0.39
- Total quality factor
- QTS
- 0.36
- Maximum linear excursion
- xmax
- 5.0
- mm
- Air volume displaced at xmax
- VD
- 110
- cm³
- Power handling
- P
- 200
- W
- Program power
- Pmax
- 400
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 5.2
- Ω
- Inductance (1kHz)
- LE
- 1.2
- mH
- VC Diameter
- 52
- mm
- Winding height
- HVC
- 16
- mm
- Winding material
- Copper
- Former material
- Kapton
- Flux density
- B
- 1.1
- T
- Force factor
- Bl
- 11.5
- N/A
- Motor constant
- Bl/√RE
- 5.04
- N/√W
- Air gap height
- HAG
- 8
- mm
- Material
- Ferrite
- Effective diameter
- 167
- mm
- Effective area
- SD
- 220
- cm²
- Moving mass
- MMS
- 21
- g
- Moving mass (without air load)
- MMD
- 18.5
- g
- Material
- Waterproof Front Side
- Stiffness
- KMS
- 4.61
- N/mm
- Compliance
- CMS
- 217
- µm/N
- Equivalent volume to the compliance
- VAS
- 15
- L
- Mechanical resistance
- RMS
- 2.38
- N·s/m
- Nominal diameter
- 8
- ″
- 210
- mm
- Overall diameter
- 225
- mm
- Baffle cutout diameter
- 187
- mm
- Overall depth
- 135
- mm
- Flange thickness
- 11
- mm
- Mounting depth
- 124
- mm
- Volume occupied by the driver (estimated)
- 1.6
- L
- Net weight
- 4.1
- kg
Available on (affiliate link)
Specifications
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
![B&C Speaker 8CX21 Impedance](/BC/8CX21/BC_8CX21_(Impedance).png)
![B&C Speaker 8CX21 SPL 1](/BC/8CX21/BC_8CX21_(Frequency_response_1).png)
![B&C Speaker 8CX21 SPL 2](/BC/8CX21/BC_8CX21_(Frequency_response_2).png)
![B&C Speaker 8CX21 Directivity](/BC/8CX21/BC_8CX21_(Directivity).png)
![B&C Speaker 8CX21 Directivity map HF](/BC/8CX21/BC_8CX21_(Directivity_map_HF).png)
![B&C Speaker 8CX21 Directivity map LF](/BC/8CX21/BC_8CX21_(Directivity_map_LF).png)
![B&C Speaker 8CX21 Dimensions](/BC/8CX21/BC_8CX21_(Dimensions).png)
Export this driver to a simulation software:
![WinISD](/images/export/WinISD.png)
![Basta!](/images/export/Basta.png)
![Hornresp](/images/export/Hornresp.png)
![QSpeakers](/images/export/QSpeakers.png)
![SpeakerSim](/images/export/SpeakerSim.png)
![MfbLabs](/images/export/MfbLabs.png)
![Speakerbench](/images/export/Speakerbench.png)