BGS 40 8 OHM Art. No. 3040 40 cm (15") woofer with hard cone suspension for P.A. systems, stage monitors and musicians speakers. Solid aluminium die-cast basket for front- or rear baffle mounting. High efficiency and high power handling due to large magnetic drive with vent and 65 mm voice-coil. Recommended cabinets: Volume/Principle BR-Channel fb 70 l/bass reflex 4 x BR 15.34 (length 10 cm) 54 Hz 2 x BR 25.50 (length 7 cm) 100 l/bass reflex 4 x BR 15.34 (length 10 cm) 46 Hz 2 x BR 25.50 (length 7 cm)   Used in / Accessories: MB 115/B MB 115/H MB 156/3 NoBox BB

sketch frequency- and impedance response

Technical Data: Rated power 200 W Maximum power 300 W Nominal impedance Z 8 Ohm Frequency response fu–4000 Hz (fu: Lower cut-off frequency depending on cabinet) . Mean sound pressure level 98 dB (1 W/1 m) Excursion limit +/−8 mm Resonance frequency fs 40 Hz Magnetic induction 1,1 T Magnetic flux 1800 µWb Height of front pole-plate 8 mm Voice coil diameter 65 mm Height of winding 12 mm Cutout diameter 359 mm Net weight 5,4 kg D.C. resistance Rdc 6,5 Ohm Mechanical Q factor Qms 3,13 Electrical Q factor Qes 0,49 Total Q factor Qts 0,42 Equivalent volume Vas 263 l Effective piston area Sd 855 cm² Dynamically moved mass Mms 80 g Force factor Bxl 16,8 Tm Inductance of the voice coil L 1,55 mH