http://www.seas.no/index.php?option=...256&Itemid=241

High Quality automotive woofer.

A glass fi brecone, and a stiff low loss rubber surround carefully matched to each
other, result in a smooth frequency response, and a clear, precise reproduction of the
critical midrange area.

A relatively large voice coil diameter results in high power handling capacity.
The magnet system with a T-shaped cross section of the pole piece gives low
modulation distortion.

The bullet shaped phase plug reduces compression due to temperature variations in
the voice coil and avoids resonances that would occur in the volume between the
dust cap and the pole piece and increases the power handling capacity.

The extremely stiff and stable injection moulded metal basket keeps the critical
components in perfect alignment.


Nominal Impedance 4 Ohms
Voice Coil Resistance 3.3 Ohms
Recommended Frequency Range 50 - 3000 Hz
Voice Coil Inductance 0.78 mH
Short Term Power Handling * 100 W
Force Factor 6.0 N/A
Long Term Power Handling * 250 W
Free Air Resonance 64 Hz
Characteristic Sensitivity (2.83V, 1m) 90.0 dB
Moving Mass 16.9 g
Voice Coil Diameter 39 mm
Air Load Mass In IEC Baffl e 0.82 g
Voice Coil Height 12 mm
Suspension Compliance 0.4 mm/N
Air Gap Height 6 mm
Suspension Mechanical Resistance 1.3 Ns/m
Linear Coil Travel (p-p) 6 mm
Effective Piston Area 126 cm2
Maximum Coil Travel (p-p) 19 mm
VAS 8 Litres
QMS 5.49
QES 0.65
QTS 0.58
Magnetic Gap Flux Density 0.88 T
Magnet Weight 0.42 kg
Total Weight 1.70 kg

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