L+ and L- is for the left channel.
R+ and R- is for the right channel.
It doesn’t matter much if the connections are reversed because the left and right headphones don’t interfere with each other.
Hi Rohane,
It is important that the Red and White wires are connected to the correct earphone terminal.
You should have the Left and Right ears being driven in phase with the audio signal.
eg: both sending the air compression and air rarefaction signals to the ears in phase
E