GB
Sound module USM-RC-3
28
BEIER-Electronic
11.10.2021
Loudspeaker
Loudspeakers with an impedance of at least 4
Ω
and a maximum output of at least
8 W can be connected to the USM-RC-3 sound module. We recommend using a full-
range loudspeaker with 4
Ω
or 8
Ω
. Loudspeakers with a higher impedance will of
course also work, but the volume will decrease as the impedance increases.
The maximum power and thus the volume of the sound module depends, in addition
to the impedance, also on the level of the supply voltage.
To reach a perfect level of volume and sound quality, you have to install the
loudspeaker in a suitable resonant body (loudspeaker box). A loudspeaker, which
lies only on the table, never reaches an optimum sound quality.
At every amplifier heat arises through power dissipation. This heat must be
dissipated by a cooling element into the air. Always pay attention to a good air
circulation to prevent overheating. Especially at higher voltages (e.g. above 9,6V) it
might be neccessary to use active cooling of the USM-RC-3 with a little fan.
If the output power is still not enough for your application, it is possible to use a
speaker to RCA line level converter (high/low) mit galvanic separation (used in car
radios) and a small capacitor (10nF) at the input, in order to connect an additional
amplifier.
