OBERTON 12L300

Nominal Diameter
Impedance
Minimum Impedance
Power Capacity AES ¹
Power Capacity ²
Program Power ³
Sensitivity
Frequency Range
Voice Coil Diameter
Voice Coil Material
Voice Coil Former
Voice Coil Winding Depth
Magnet Gap Depth
Cone Material
Basket
Magnet
Flux Density

12"/310 inch/mm
8 Ohm
6.20 Ohm
400 W
300 W
800 W
(200-2000 Hz) 100.5 dB/W/m
60 - 5000 Hz
64 mm
Aluminium
Kapton™
11 mm
9 mm
Paper
Die cast aluminium
Ferrite
1.35 T

1. AES standard. Power is calculated on rated minimum impedance.
2. Measurement is in 65 L box enclosure tuned 63 Hz using a 40-400 Hz band limited pink noise test signal applied continuously for 2 hours.
3. Program power is defined as 3db greater than AES Power Capacity.     

Resonance Frequency
Mechanical Efficiency Factor (Qms)
Electrical Efficiency Factor (Qes)
Total Q (Qts)
Equivalent Air Volume (Vas )
Diaphragm mass ind. airload (Mms)
Voice Coil Resistance Re
Effective Diagram Area (Sd)
Peak Linear Displacement of Diaphragm (Xmax)
Mechanical Compliance of Suspension (Cms)
BL Product (BL)
V.C. Inductance at 1 kHz (Le)

53.80 Hz
9.98
0.261
0.254
79.63 Litres
40.65 grams
5.35 Ohms
514.7 cm2
± 3.25 mm
0.215 mm/N
16.78 T.m
0.69 mH

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

Overall Diameter
Baffle Hole Diameter 
Number of Mounting Holes
Bolt Circle Diameter
Overall Depth
Net Weight

310 mm
280 mm
8 with dia. 7 mm
244 mm
144.7 mm
6.8 kg