Oberton 12NB400
 8Ω
Subwoofer
| Nominal diameter | 12″ / 315 mm | 
| Resonance | 43.6 Hz | 
| Q factor | 0.18 | 
| Sensitivity | 96.7 dB | 
| Linear excursion | ± 5.3 mm | 
| Program Power | 900 W | 
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 96.7dB
 - Frequency response 50 - 2000Hz
 
Thiele & Small parameters
- Resonance frequency (free air) fS 43.6Hz
 - Mechanical quality factor QMS 10.39
 - Electrical quality factor QES 0.18
 - Total quality factor QTS 0.18
 
Large signal parameters
- Maximum linear excursion xmax 5.3mm
 - Air volume displaced at xmax VD 270cm³
 - Power handling P 450W
 - Program power Pmax 900W
 
Voice Coil
- Nominal impedance Z 8Ω
 - DC resistance RE 5.0Ω
 - Inductance (1kHz) LE 0.83mH
 - VC Diameter 77mm
 - Winding height HVC 15mm
 - Winding material Aluminium
 - Former material Kapton
 
Magnet
- Flux density B 1.45T
 - Force factor Bl 20.3N/A
 - Motor constant Bl/√RE 9.1N/√W
 - Air gap height HAG 9mm
 - Material Neodymium
 
Diaphragm
- Effective diameter 256mm
 - Effective area SD 515cm²
 - Moving mass MMS 59.8g
 - Moving mass (without air load) MMD 51.4g
 - Material Paper with glassfiber
 
Suspensions
- Stiffness KMS 5.1N/mm
 - Compliance CMS 196µm/N
 - Equivalent volume to the compliance VAS 70.5L
 - Mechanical resistance RMS 1.58N·s/m
 
Dimensions
- Nominal diameter 12″
 - 315mm
 - Overall diameter 315mm
 - Baffle cutout diameter 280mm
 - Overall depth 180mm
 - Volume occupied by the driver (estimated) 2.8L
 - Net weight 5.0kg
 - Frame material Die Cast Aluminium
 
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