B&C Speaker 18RS115
8Ω
Subwoofer
| Nominal diameter | 18″ / 460 mm |
| Resonance | 33 Hz |
| Q factor | 0.22 |
| Sensitivity | 94.4 dB |
| Linear excursion | ± 23.5 mm |
| Program Power | 4000 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 94.4dB
- Frequency response 35 - 1000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 33Hz
- Mechanical quality factor QMS 9.00
- Electrical quality factor QES 0.23
- Total quality factor QTS 0.22
Large signal parameters
- Maximum linear excursion (one way) xmax 23.5mm
- Air volume displaced at xmax VD 2844cm³
- Power handling P 2000W
- Program power Pmax 4000W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 4.5Ω
- Inductance (1kHz) LE 5.1mH
- VC Diameter 116mm
- Winding height HVC 54mm
- Winding material Aluminium
- Former material Glass Fibre
Magnet
- Flux density B 0.9T
- Force factor Bl 40N/A
- Motor constant Bl/√RE 18.9N/√W
- Air gap height HAG 14mm
- Material Neodymium Inside Slug
Diaphragm
- Effective diameter 393mm
- Effective area SD 1210cm²
- Moving mass MMS 391g
- Moving mass (without air load) MMD 362g
- Material Waterproof Both Sides
Suspensions
- Stiffness KMS 16.9N/mm
- Compliance CMS 59µm/N
- Equivalent volume to the compliance VAS 125L
- Mechanical resistance RMS 9.01N·s/m
- Spider material Silicone
Dimensions
- Nominal diameter 18″
- 460mm
- Overall diameter 460mm
- Baffle cutout diameter 425mm
- Overall depth 261mm
- Flange thickness 16mm
- Mounting depth 245mm
- Volume occupied by the driver 10L
- Net weight 15.4kg
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