Connecting an external power amplifier
You can use this unit as a pre-amp by connecting an external power amplifier to the PRE OUT connectors. By adding a power amplifier to each channel, the realness of the sound can be further enhanced.
Select the terminal to use and connect the device.
Set “Assign Mode” to “Pre Amplifier” if connecting all channels to the Pre-out connectors using an external amplifier. link
This stops operation of the internal power amplifier of this unit, reducing interference in the pre amplifier created by the power amplifier.
When using just one surround back speaker, connect it to the left channel (L) terminal.