BG 20 - 8 Ohm

Art. No. 3020

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
Volume/Principle BR-Channel fb fc/QTC
30 l/closed - - 82 Hz/0,96
30 l/bass reflex BR 15.34 42 Hz -
50 l/bass reflex BR 15.34 (length 7 cm) 42 Hz -

Technical Data

Rated power
40 W
Maximum power
70 W
Nominal impedance Z
8 Ohm
Frequency response
fu–18000 Hz
(fu: Lower cut-off frequency depending on cabinet)
.
Mean sound pressure level
92 dB (1 W/1 m)
Opening 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
D.C. 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 l
Effective piston area Sd
214 cm²
Dynamically moved mass Mms
10 g
Force factor Bxl
6.1 Tm
Inductance of the voice coil L
0.8 mH
Temperature range
−40 ... 80 °C
Frequency- and impedance response
Directivity pattern
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