G 20 SC - 8 Ohm

Art. No. 1185

Magnetically shielded 20 mm (0.8") High-end textile dome unit for use at tweeter frequencies of 3,000 Hz and above. The optimised dome shape and damping felt on the pole piece ensures a very balanced frequency response without resonance and excellent omnidirectional sound distribution. The powerful magnet drive and ferro-fluid cooled voice coil guarantee both high efficiency and excellent power handling capabilities.

Technical Data

Nominal impedance Z
8 Ohm
Frequency response
1200–30000 Hz
Mean sound pressure level
88 dB (1 W/1 m)
Opening angle (-6 dB)
180°/8000 Hz
Resonance frequency fs
1890 Hz
Magnetic induction
1.3 T
Magnetic flux
200 µWb
Height of front pole-plate
2.5 mm
Voice coil diameter
20 mm
Height of winding
2 mm
Cutout diameter
66 mm
Net weight
0.39 kg
D.C. resistance Rdc
4.8 Ohm
Mechanical Q factor Qms
0.36
Electrical Q factor Qes
1.34
Total Q factor Qts
0.28
Effective piston area Sd
4 cm²
Dynamically moved mass Mms
0.15 g
Inductance of the voice coil L
0.02 mH
Peak power handling with high pass
140 W (12 dB/Okt.; 2000 Hz)180 W (12 dB/Okt.; 4000 Hz)
Nominal power handling with high pass
80 W (12 dB/Okt.; 2000 Hz)120 W (12 dB/Okt.; 4000 Hz)
Frequency- and impedance response
Directivity pattern