Connecting an external power amplifier

Set “Amp Assign” to “Preamplifier” 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 preamplifier created by the power amplifier.

You can use the “Connection” setting in the Speaker Layout Menu to disconnect the built-in power circuit of each channel individually and use just your favorite channel as the Preamplifier. link

When using just one surround back speaker, connect it to the left channel (L) terminal.

The output signal for the PRE OUT connector of Height 1, Height 2, Height 3, and Height 4 vary depending on the combination of the Height/Ceiling/Dolby Atmos Enabled speakers that you are using. For the PRE OUT connector that connects each Height/Ceiling/Dolby Atmos Enabled speaker, refer to “Speaker Layout” - “Layout” or “Front Layout / Middle Layout / Rear Layout / TS/CH”link.

You can connect to the subwoofer with either an RCA connection or the XLR terminal.

The XLR terminal of the subwoofer can be used as a speaker other than a subwoofer such as the Front Left, Front Right, or Center channel. To use it as a speaker, assign it to a channel of your choice in “XLR Output Assign”. link