GB Sound speed controller SFR-1
06.02.2019 BEIER-Electronic 17
Loudspeaker
You can connect every loudspeaker to the SFR-1, which has an impedance of at
least 4 Ω and is designed for the respective maximal power. We recommend using
full range loudspeakers with 4 or 8 Ω. Higher impedances are also possible, but the
volume decreases with higher impedances.
The maximum power and thus the volume of the sound module, is also heavily
dependent on the height 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 SFR-1 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.
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