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technical data:  
Aluminium deicast frame diameter 310mm
Mounting hole 281 mm
Mounting depth 128 mm
8 mounting hole cross distance 292 mm
Magnet  system ferrite ring with increased force.
Voice coil 50 mm glassfiber bobbin with 2 x 2 layer copper wire of the highest 250° Celsius class, winding height 22mm, X-max = 8mm
RMS power handling 2 x 100 W
Impulse power handling 2 x 200 w, 2 seconds
Spider with integrated lead wires
Membrane cellulose mixture with 8 cuts and 90° glassfiber films, ABS membrane neck with large ventilation
dust cap cellulose mixture as membrane
efficiency 89 dB / 1W / 1m
Thiele-Small Parameter (exept Re all data at both voice coils parallel = 2 Ohm)
Re = 3,9 + 3,9 Ohm, Le = 0,50 mH, FS = 25 Hz, Qms = 10,81, Qes = 0,754, Qts = 0,70, Sd = 509 qcm, Vas = 193 l, Mms = 90 g, BL = 8,12 N/A.