Yamaha A-S801 Owner's Manual page 9

A IMPEDANCE SELECTOR switch
CAUTION
Do not change the IMPEDANCE SELECTOR switch
while the power is turned on, as doing so may damage
the unit.
If the IMPEDANCE SELECTOR switch may not be
fully slid to either position, remove the power cable
and slide the switch all the way to either position.
Select the switch position according to the impedance
of the speakers.
Speaker Speaker
connection impedance
6 Ω or higher
8 Ω or higher
SPEAKERS A
(Asia model only)
or
SPEAKERS B
4 Ω or higher
12 Ω or higher
(U.K. model only)
SPEAKERS A
16 Ω or higher
and
(Asia model only)
SPEAKERS B
8 Ω or higher
6 Ω or higher
8 Ω or higher
(Asia model only)
Bi-wiring
4 Ω or higher
B AC IN
Used to connect the supplied power cable to an AC
wall outlet (see page 10).
Switch
position
HIGH
LOW
HIGH
LOW
HIGH
LOW
CONTROLS AND FUNCTIONS
5
En