GF 200 2 x 4 OHM Art. No. 1330 20 cm (8") High-End woofer with black glass fibre cone, solid aluminium die-cast basket and elastic rubber surround. Designed for multi-purpose applications due to 2 x 4 ohms double voice-coil, with excellent properties as 8 ohms drivers in series configuration. The long stroke voice-coil in conjunction with the extended rear pole plate, the vented damper, the vented magnet and the capton voice-coil carrier guarantees long strokes and highest power handling. Possible connections: (1) one voice coil not connected (2) both voice coils in series (3) both voice coils in parallel Recommended cabinets: Volume/Principle BR-Channel fb 30 l/bass reflex BR 25.50 40 Hz 50 l/bass reflex BR 25.50 31 Hz 70 l/bass reflex BR 25.50 27 Hz   Used in / Accessories: CASABLANCA III CLASSIC 200 GF ELEVATION 3 FONTANELLA SUB NANO SUB SOLITUDE VIB 2000 GF
sketch waterfall spectrum frequency- and impedance response (1) frequency- and impedance response (2) frequency- and impedance response (3)	Technical Data: Rated power 120 W Maximum power 180 W Nominal impedance Z (1) 4 Ohm (2) 8 Ohm (3) 2 Ohm Frequency response fu–8000 Hz (fu: Lower cut-off frequency depending on cabinet) . Mean sound pressure level (1) 85 dB (1 W/1 m) (2) 88 dB (1 W/1 m) (3) 88 dB (1 W/1 m) Opening angle (-6 dB) 46°/4000 Hz Excursion limit +/−10 mm Resonance frequency fs (1) 34 Hz (2) 30 Hz (3) 35 Hz Magnetic induction 1,3 T Magnetic flux 930 µWb Height of front pole-plate 6 mm Voice coil diameter 38 mm Height of winding 18 mm Cutout diameter 190 mm Net weight 2,5 kg D.C. resistance Rdc (1) 2,9 Ohm (2) 5,8 Ohm (3) 1,4 Ohm Mechanical Q factor Qms (1) 4,51 (2) 4,12 (3) 4,33 Electrical Q factor Qes (1) 0,93 (2) 0,37 (3) 0,44 Total Q factor Qts (1) 0,77 (2) 0,34 (3) 0,39 Equivalent volume Vas (1) 62 l (2) 68 l (3) 57 l Effective piston area Sd 214 cm² Dynamically moved mass Mms 25 g Force factor Bxl (1) 4,6 Tm (2) 9,2 Tm (3) 4,6 Tm Inductance of the voice coil L (1) 0,4 mH (2) 1,1 mH (3) 0,3 mH Similar Products AL 200 8 OHM TIW 200 XS 8 OHM W 200 4 OHM W 200 8 OHM W 200 S 4 OHM W 200 S 8 OHM WS 20 E 4 OHM WS 20 E 8 OHM
directivity pattern