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  

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

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 <br> (2) 5.8 Ohm <br> (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
Frequency- and impedance response
Directivity pattern
Waterfall spectrum