Oberton 18NXB1200

SPECIFICATIONS

Nominal Diameter: 18"/461 inch/mm
Impedance: 8 Ohm
Minimum Impedance: 6.88 Ohm
Power Capacity AES : 1200 W
Program Power : 2400 W
Sensitivity: (50-200 Hz) 97.5 dB/W/m
Frequency Range: 35 - 1000 Hz
Voice Coil Diameter: 100 mm
Voice Coil Material: Copper
Voice Coil Former: Glassfiber
Voice Coil Winding Depth: 31 mm
Magnet Gap Depth: 14 mm
Cone Material: Carbon fiber doped paper
Basket: Die cast aluminium
Magnet: Neodymium
Flux Density: 1.05 T

THIELE-SMALL PARAMETERS

Resonance Frequency: 35.83 Hz
Mechanical Efficiency Factor (Qms): 9.24
Electrical Efficiency Factor (Qes): 0.291
Total Q (Qts): 0.282
Equivalent Air Volume (Vas ): 159.61 Litres
Diaphragm mass ind. airload (Mms): 212.81 grams
Voice Coil Resistance Re: 5.30 Ohms
Effective Diagram Area (Sd): 1158 cm2
Peak Linear Displacement of Diaphragm (Xmax)*: ± 11.5 mm
Mechanical Compliance of Suspension (Cms): 0.0927 mm/N
BL Product (BL): 29.35 T.m
V.C. Inductance at 1 kHz (Le): 1.29 mH
    
MOUNTING INFORMATION

Overall Diameter: 461 mm
Baffle Hole Diameter:  416 mm
Number of Mounting Holes: 416 mm
Bolt Circle Diameter8 eliptic 7 x 8,5 mm: 438/441 mm
Overall Depth: 222.5 mm
Net Weight: 8.95 kg
    

1.  AES standard. Power is calculated on rated minimum impedance. Measurement is in 180 L box enclosure tuned 43 Hz using a 40-400 Hz band limited pink noise test signal applied continuously for 2 hours.
2.  Program power is defined as 3db greater than AES Power Capacity.

* Linear Mathematical Xmax is calculated as: (Hvc - Hg)/2 + Hg/4 where Hvc is the voice coil depth and Hg is the gap depth.