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17 cm (6.5") HiFi woofer with coated paper cone, powerful drive and extended rear pole plate. Special voice-coil and elastic rubber surround for long strokes.
 

Technical Data:
Nominal power handling	50 Watt
Peak power handling	80 Watt
Nominal impedance	8 Ohm
Frequency response (-10 dB)	fu - 8000 Hz
(fu: Lower cut-off frequency depending on cabinet)	.
Mean sound pressure level	86 dB (1W/1m)
Maximum cone displacement	20 mm
Resonance frequency fs	36 Hz
Magnetic induction	1 Tesla
Magnetic flux	314 µ Weber
Height of front pole-plate	4 mm
Voice coil diameter	2,5 cm
Height of winding	1,25 cm
Cutout diameter	14,8 cm
Net weight	1,1 kg
D.C. resistance Rdc	6,1 Ohm
Mechanical Q factor Qms	2,05
Electrical Q factor Qes	0,6
Total Q factor Qts	0,47
Equivalent volume Vas	38 l
Effective piston area Sd	129 cm2
Dynamically moved mass Mms	13 g
Force factor Bxl	5,4 T · m
Inductance of the voice coil L	1,2 mH