Technical data

GB Sound module USM-RC
28.07.2008 BEIER-Electronic 19
Loudspeaker
You can connect every loudspeaker to the sound module USM-RC, which has an
impedance of 8 - 32 Ω and was designed for the respective maximal power. The
maximum power and the volume of the sound module, is depending very much from
the height of the supply voltage and the loudspeaker impedance.
The following table shows which maximum sine-wave power at different voltages and
loudspeaker impedances can be reached.
U=6V U=7,2V U=8,4V U=9,6V U=12V
Power at 8 Ω
1,3W 2,0W 3,0W 4,1W -
Power at 16 Ω
0,6W 1,0W 1,5W 2,1W 3,5W
Power at 32 Ω
0,3W 0,5W 0,7W 1,0W 1,7W
If the supply voltage of the sound module is over 9,6V, only loudspeakers with an
impedance of 16 Ω may be connected. Otherwise the amplifier circuit could become
too hot.
If only loudspeakers with 8 Ω are available to you, you can connect also 2 pieces in
series to get 16 Ω.
To reach an optimal volume and sound quality, the loudspeaker must be installed in a
suitable resonating body.
If the volume of the built-in amplifier does not suffice, or you would like to use lower
ohm-leveled loudspeakers (2 - 4 Ω), also an external, more efficient amplifier (e.g.
our PV-20W) can be connected.
At every amplifier a certain heat arises through power dissipation that must be
mentioned by a cooling element into the air. Generally attention should always be
paid to a heat dissipation as good as possible (air circulation).