Oberton 18B500
8Ω
Woofer
Nominal diameter | 18″ / 461 mm |
Resonance | 34.9 Hz |
Q factor | 0.28 |
Sensitivity | 96.8 dB |
Linear excursion | ± 8.8 mm |
Program Power | 1200 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 96.8dB
- Frequency response 35 - 1000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 34.9Hz
- Mechanical quality factor QMS 9.24
- Electrical quality factor QES 0.28
- Total quality factor QTS 0.28
Large signal parameters
- Maximum linear excursion xmax 8.8mm
- Air volume displaced at xmax VD 971cm³
- Power handling P 600W
- Program power Pmax 1200W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 5.1Ω
- Inductance (1kHz) LE 1.37mH
- VC Diameter 77mm
- Winding height HVC 23mm
- Winding material Copper
- Former material Glass fiber
Magnet
- Flux density B 1.27T
- Force factor Bl 24.1N/A
- Motor constant Bl/√RE 10.7N/√W
- Air gap height HAG 11mm
- Material Ferrite
Diaphragm
- Effective diameter 376mm
- Effective area SD 1110cm²
- Moving mass MMS 147g
- Moving mass (without air load) MMD 120g
- Material Paper
Suspensions
- Stiffness KMS 7.04N/mm
- Compliance CMS 142µm/N
- Equivalent volume to the compliance VAS 244L
- Mechanical resistance RMS 3.48N·s/m
Dimensions
- Nominal diameter 18″
- 461mm
- Overall diameter 461mm
- Baffle cutout diameter 417mm
- Overall depth 202mm
- Volume occupied by the driver (estimated) 6.8L
- Net weight 12.3kg
- Frame material Die cast aluminium
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