Epson LS57P1 - Manual (Page 28)

28 Setting Up the TV
Audio Receiver Connection
1 Connect one end of a standard, red/white audio cable to the R and L Audio Output
Variable connectors on the back of your TV.
2 Connect the other end of the audio cable to the R and L Audio Line Input connectors
on your audio receiver.
Note
You can’t connect external
speakers to the TV directly;
you must connect them to
an audio receiver and then
connect the receiver to
the TV.
Audio receiver
Audio cable