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Thumbnail Filmstrip of BG 20 - 8 Ohm Images
Visaton Speaker Driver - BG 20 - 8 Ohm Full Range with Tweeter Dome
Art. No. 3020
Visaton BG20 - 8 Ohm
Characteristics and Sound Properties
20 cm (8") full-range speaker with tweeter dome. High efficiency. Suitable for full-range units as vocal or guitar monitors or as a mid-range unit for full-scale or musicians' PA systems.
Typical applications:-
- Midrange unit for full scale or musicians' PA systems
-
Vocal or guitar monitors
-
Fullrange speaker for electronic organs and keyboards
Technical Specifications
Rated power | 40 W |
Maximum power | 70 W |
Nominal impedance Z | 8 Ohm |
Frequency response (fu: Lower cut-off frequency depending on cabinet) |
fu-18000 Hz |
Mean sound pressure level | 92 dB (1W/1m) |
Dispersion angle (-6 dB) | 45°/4000 Hz |
Excursion limit | ± 4 mm |
Resonance frequency fs | 38 Hz |
Magnetic induction | 1.2 T |
Magnetic flux | 380 µWb |
Height of front pole-plate | 4 mm |
Voice coil diameter | 25 mm |
Height of winding | 8 mm |
Cutout diameter | 184 mm |
Net weight | 1.3 kg |
DC resistance Rdc | 6.2 Ohm |
Mechanical Q factor Qms | 3.47 |
Electrical Q factor Qes | 0.51 |
Total Q factor Qts | 0.44 |
Equivalent volume Vas | 110 litres |
Effective piston area Sd | 214 cm2 |
Dynamically moved mass Mms | 10 grams |
Force factor Bxl | 6.1 Tm |
Inductance of the voice coil L | 0.8 mH |
Temperature range | −25 ... 70 °C |
Recommended Cabinet Sizes
Volume / Principle | BR Channel | fb | fc / QTC |
30 litre / closed | - | - | 82 Hz/0.96 |
30 litre / bass reflex | BR 15.34 | 42 Hz | - |
50 litre / bass reflex | BR 15.34 (length 7 cm) |
42 Hz | - |
fc = System resonance (sealed box system)
QTC = The system's Q at resonance (fc)
Driver Dimensions
Loudspeaker Driver Dimensions and Measurements - all dimensions in mm (approx.)
Frequency and Impedance Response
Loudspeaker Frequency and Impedance Response Graph
Directivity Pattern
Loudspeaker Directivity Pattern (on and off axis response)
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