W 170 S 8 OHM Art. No. 9025 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. Recommended cabinets: Volume/Principle BR-Channel fb fc/QTC 20 l/closed  -  - 57 Hz/0,74 20 l/bass reflex BR 19.24 (length 14 cm) 44 Hz  - 30 l/bass reflex BR 15.34 (length 12 cm) 39 Hz  - 50 l/bass reflex BR 15.34 33 Hz  -   Used in / Accessories: ALTO III C
sketch frequency- and impedance response	Technical Data: Rated power 50 W Maximum power 80 W Nominal impedance Z 8 Ohm Frequency response fu–8000 Hz (fu: Lower cut-off frequency depending on cabinet) . Mean sound pressure level 86 dB (1 W/1 m) Opening angle (-6 dB) 72°/4000 Hz Excursion limit +/−10 mm Resonance frequency fs 36 Hz Magnetic induction 1,0 T Magnetic flux 314 µWb Height of front pole-plate 4 mm Voice coil diameter 25 mm Height of winding 12,5 mm Cutout diameter 148 mm Net weight 1,1 kg D.C. resistance Rdc 5,9 Ohm Mechanical Q factor Qms 2,43 Electrical Q factor Qes 0,66 Total Q factor Qts 0,52 Equivalent volume Vas 38 l Effective piston area Sd 129 cm² Dynamically moved mass Mms 13 g Force factor Bxl 5,4 Tm Inductance of the voice coil L 1,2 mH Similar Products AL 170 8 OHM W 170 8 OHM W 170 S 4 OHM WS 17 E 4 OHM WS 17 E 8 OHM
directivity pattern