B&C Speaker 21SW115
4Ω
8Ω
Subwoofer
21″ / 530 mm
Nominal diameter
30 Hz
Resonance
0.37
Q factor
95 dB
Sensitivity
± 14 mm
Linear excursion
3400 W
Program Power
- Amazon.com
- $$$
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 94.9
- dB
- Frequency response
- 30 - 1000
- Hz
- Resonance frequency (free air)
- fS
- 30.0
- Hz
- Mechanical quality factor
- QMS
- 10.90
- Electrical quality factor
- QES
- 0.39
- Total quality factor
- QTS
- 0.37
- Maximum linear excursion
- xmax
- 14.0
- mm
- Air volume displaced at xmax
- VD
- 2352
- cm³
- Power handling
- P
- 1700
- W
- Program power
- Pmax
- 3400
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 5.4
- Ω
- Inductance (1kHz)
- LE
- 2.1
- mH
- VC Diameter
- 116
- mm
- Winding height
- HVC
- 34
- mm
- Winding material
- Copper
- Former material
- Glass Fibre
- Flux density
- B
- 1.15
- T
- Force factor
- Bl
- 30.1
- N/A
- Motor constant
- Bl/√RE
- 13.0
- N/√W
- Air gap height
- HAG
- 14
- mm
- Material
- Neodymium Inside Slug
- Effective diameter
- 462
- mm
- Effective area
- SD
- 1680
- cm²
- Moving mass
- MMS
- 342
- g
- Moving mass (without air load)
- MMD
- 293.8
- g
- Material
- Waterproof Both Sides
- Stiffness
- KMS
- 12.35
- N/mm
- Compliance
- CMS
- 81
- µm/N
- Equivalent volume to the compliance
- VAS
- 318
- L
- Mechanical resistance
- RMS
- 5.91
- N·s/m
- Spider material
- Silicone
- Nominal diameter
- 21
- ″
- 530
- mm
- Overall diameter
- 547
- mm
- Baffle cutout diameter
- 503
- mm
- Overall depth
- 249
- mm
- Flange thickness
- 14
- mm
- Mounting depth
- 235
- mm
- Volume occupied by the driver
- 15.0
- L
- Net weight
- 14.0
- kg