Date: 2017-06-28
PPA DSP amplifier user manual
17
Figure 3 Ferrite in Speaker Wires
Figure 5 Lightning Flash Symbol for Speaker
Connectors
Figure 4 Proper Cabling
7.
Loudspeaker Connections
Follow these instructions to connect your speaker chassis to the amplifier module.
For better EMC compliance, use a ferrite on the speaker wires to reduce radiated emissions. For example, a
74270095 from Wuerth can be used. Wind all speaker wires 2 times through the ferrite. Place the ferrite close to
the amplifier module speaker output connector as shown in Figure 3.
All cables shall be kept as far away from the PCB as possible. Avoid running cables across the power amplifier
module and use twisted pair speaker cables (Figure 4). [Information and pictures in this chapter taken from S-
PRO2 Application manual 1.11]
If you intend to make speaker signals accessible externally, you’ll have to print a lightning flash with arrow head
symbol next to the speaker socket to indicate high voltage. See Figure 5.