LENCO LS-410WA Manuel De L'utilisateur page 16

Align the settings for the pre-amplifier selector switch and
connect the RCA audio cable to an input jack that is
compatible with the connectable equipment you are using
(amplifier, active speakers, etc.).
The RCA audio cable's red jack is for the right (R) channel, and
•
the white jack is for the left (L) channel.
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