W 300 S 4 OHM Art. No. 9040 30 cm (12") HiFi woofer with powerful drive, extended rear pole plate and long stroke surround. 50 mm voice-coil for high power handling. Very suitable for large 3-way and 4-way combinations and for high power handling subwoofers. Recommended cabinets: Volume/Principle BR-Channel fb 70 l/bass reflex 2 x BR 15.34 36 Hz 100 l/bass reflex 2 x BR 15.34 (length 12 cm) 32 Hz 1 x BR 25.50 (length 7 cm) 150 l/bass reflex 2 x BR 15.34 (length 7 cm) 29 Hz   Used in / Accessories: KM 140

sketch frequency- and impedance response

Technical Data: Rated power 150 W Maximum power 200 W Nominal impedance Z 4 Ohm Frequency response fu–4200 Hz (fu: Lower cut-off frequency depending on cabinet) . Mean sound pressure level 92 dB (1 W/1 m) Excursion limit +/−14 mm Resonance frequency fs 23 Hz Magnetic induction 1,1 T Magnetic flux 1400 µWb Height of front pole-plate 8 mm Voice coil diameter 50 mm Height of winding 18,5 mm Cutout diameter 280 mm Net weight 4,5 kg D.C. resistance Rdc 3,5 Ohm Mechanical Q factor Qms 1,6 Electrical Q factor Qes 0,3 Total Q factor Qts 0,25 Equivalent volume Vas 300 l Effective piston area Sd 507 cm² Dynamically moved mass Mms 62 g Force factor Bxl 8,4 Tm Inductance of the voice coil L 1,1 mH Similar Products TIW 300 8 OHM W 300 8 OHM W 300 S 8 OHM