Visaton G 20 SC 8 Ohm, 0.8 Inch, High-End Dome Tweeter
Product photo · Enlarge image
Product photo
Rear view and connections
Dimension drawing
Response and impedance
Directivity pattern
Product photographs and manufacturer drawings. Images are not to scale.
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The G 20 SC has an optimised textile dome with damping felt on the pole piece, giving a balanced, resonance-free response and wide dispersion. Its ferrofluid-cooled voice coil and strong magnet drive give high efficiency, and the shielded magnet allows use close to a screen. This 8 Ω version takes 80 W with a 12 dB/oct. high-pass from 2000 Hz and resonates at 1890 Hz.
Typical applications
- High-end hi-fi systems
- Tweeter for multi-way hi-fi speakers
- Speaker kit builds
Full specifications
| Rated power | 80 W (12 dB/oct. high-pass from 2000 Hz) / 120 W (12 dB/oct. high-pass from 4000 Hz) |
|---|---|
| Maximum power | 140 W (12 dB/oct. high-pass from 2000 Hz) / 180 W (12 dB/oct. high-pass from 4000 Hz) |
| Nominal impedance | 8 Ω |
| Frequency response (−10 dB) | 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 |
| Cut-out | 66 mm |
| Net weight | 0.39 kg |
| D.C. resistance Rdc | 4.8 Ω |
| 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 |
| Terminals | 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) |
Dimensions and drawings

Dimension drawing · Open original image
Installation and cabinet guidance
Allow a 66 mm panel opening. The round faceplate is 94 mm in diameter, with 4 mm fixing holes on an 82 mm circle; mark them from the unit itself rather than assuming the spacing. Behind the panel allow about 27 mm for the 64 mm rear housing, plus room for the terminals and the wiring.
Mount it on a rigid baffle with a continuous seal between the faceplate and the panel, tighten the fixings evenly and only enough to seal so the faceplate is not distorted, and keep the dome clear of any grille. Connect to the 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) blade terminals with matching push-on connectors and observe polarity; the two blade widths identify it. The power ratings apply only with a 12 dB/oct. high-pass filter, and they depend on where it is set: 80 W from 2000 Hz, or 120 W from 4000 Hz. Feed it through the system crossover or a high-pass filter that gives at least that protection; never connect it directly to a full-range signal. Use an amplifier suitable for the 8 Ω load. The magnet system is shielded.
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