B&C Speaker 21DS115
4Ω
8ΩSubwoofer
| Nominal diameter | 21″ / 530 mm |
| Resonance | 30 Hz |
| Q factor | 0.21 |
| Sensitivity | 96.6 dB |
| Linear excursion | ± 15 mm |
| Program Power | 3400 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 96.6dB
- Frequency response 30 - 1000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 30Hz
- Mechanical quality factor QMS 11.00
- Electrical quality factor QES 0.20
- Total quality factor QTS 0.21
Large signal parameters
- Maximum linear excursion (one way) xmax 15mm
- Air volume displaced at xmax VD 2520cm³
- Power handling P 1700W
- Program power Pmax 3400W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 2.2Ω
- Inductance (1kHz) LE 2.4mH
- VC Diameter 116mm
- Winding height HVC 36mm
- Winding material Aluminium
- Former material Glass Fibre
Magnet
- Flux density B 0.8T
- Force factor Bl 28.8N/A
- Motor constant Bl/√RE 19.4N/√W
- Air gap height HAG 14mm
- Material Neodymium Inside Slug
Diaphragm
- Effective diameter 462mm
- Effective area SD 1680cm²
- Moving mass MMS 412g
- Moving mass (without air load) MMD 364g
- Material Waterproof Both Sides
Suspensions
- Stiffness KMS 14.3N/mm
- Compliance CMS 70µm/N
- Equivalent volume to the compliance VAS 274L
- Mechanical resistance RMS 7.06N·s/m
- Spider material Silicone
Dimensions
- Nominal diameter 21″
- 530mm
- Overall diameter 547mm
- Baffle cutout diameter 508mm
- Overall depth 255mm
- Flange thickness 13mm
- Mounting depth 242mm
- Volume occupied by the driver 15L
- Net weight 14.7kg
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Export this driver to a simulation software:
Closed Box Simulator·
Speakerbench
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QSpeakers
SpeakerSim
MfbLabs
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