Oberton 8NM250 V2 16 ohmi

SPECIFICATIONS

THIELE-SMALL PARAMETERS

Nominal Diameter
Impedance
Minimum Impedance
Power Capacity AES ¹
Program Power ²
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

8"/210 inch/mm
16 Ohm 
13.23 Ohm
250 W
500 W
(500-5000 Hz) 100 dB/W/m
100 – 5000 Hz
64 mm
Aluminium
Glassfiber
10 mm
7 mm
Paper with carbone fiber
Die cast aluminium
Neodymium
1.55 T

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)

67.7 Hz
13.94
0.257
0.252
8.39 Litres
16.83 grams
10.97 Ohms
202 cm2
± 4 mm
0.1501 mm/N
21.26 T.m
0.27 mH

MOUNTING INFORMATION 

1. AES standard. Power is calculated on rated minimum impedance. Measurement is in 18 L box enclosure tuned 82 Hz using a 60-2000 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.

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

225 mm
187 mm
8 with dia. 6.5 mm
210 mm
84 mm
2.70 kg