Sony STR-DA3300ES Operating Instructions Manual page 18

b)
If you connect only one surround back
speaker, connect it to the SURROUND
BACK SPEAKERS L terminals.
c)
When you connect a sub woofer with an auto
standby function, turn off the function when
watching movies. If the auto standby
function is set to on, it turns to standby mode
automatically based on the level of the input
signal to a sub woofer, then sound may not
be output.
Notes
• When you connect all the speakers with a nominal
impedance of 8 ohms or higher, set "Impedance" in
the Speaker settings menu to "8 Ω." In other
connections, set it to "4 Ω." For details, see "8:
Setting the speakers" (page 41).
• Before connecting the AC power cord (mains
lead), make sure that metallic wires of the speaker
cords are not touching each other between the
SPEAKERS terminals.
Tip
To connect certain speakers to another power
amplifier, use the PRE OUT jacks. The same signal
is output from both the SPEAKERS terminals and
the PRE OUT jacks. For example, if you want to
connect just the front speakers to another amplifier,
connect that amplifier to the PRE OUT FRONT L
and R jacks.
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