Oberton 18B500
Woofer
18″ / 461 mm
Nominal diameter
35 Hz
Resonance
0.28
Q factor
97 dB
Sensitivity
± 8.75 mm
Linear excursion
1200 W
Program Power
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- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 96.8
- dB
- Frequency response
- 35 - 1000
- Hz
- Resonance frequency (free air)
- fS
- 34.9
- Hz
- Mechanical quality factor
- QMS
- 9.24
- Electrical quality factor
- QES
- 0.28
- Total quality factor
- QTS
- 0.28
- Maximum linear excursion
- xmax
- 8.75
- mm
- Air volume displaced at xmax
- VD
- 971
- cm³
- Power handling
- P
- 600
- W
- Program power
- Pmax
- 1200
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 5.1
- Ω
- Inductance (1kHz)
- LE
- 1.37
- mH
- VC Diameter
- 77
- mm
- Winding height
- HVC
- 23
- mm
- Winding material
- Copper
- Former material
- Glass fiber
- Flux density
- B
- 1.27
- T
- Force factor
- Bl
- 24.06
- N/A
- Motor constant
- Bl/√RE
- 10.7
- N/√W
- Air gap height
- HAG
- 11
- mm
- Material
- Ferrite
- Effective diameter
- 376
- mm
- Effective area
- SD
- 1110
- cm²
- Moving mass
- MMS
- 146.8
- g
- Moving mass (without air load)
- MMD
- 120.1
- g
- Material
- Paper
- Stiffness
- KMS
- 7.04
- N/mm
- Compliance
- CMS
- 142
- µm/N
- Equivalent volume to the compliance
- VAS
- 244
- L
- Mechanical resistance
- RMS
- 3.48
- N·s/m
- Nominal diameter
- 18
- ″
- 461
- mm
- Overall diameter
- 461
- mm
- Baffle cutout diameter
- 417
- mm
- Overall depth
- 202
- mm
- Volume occupied by the driver (estimated)
- 6.8
- L
- Net weight
- 12.3
- kg
- Frame material
- Die cast aluminium
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
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