Impedance Selector Switch - Yamaha RX-V640RDS Owner's Manual

CONNECTIONS
I Connections
Be sure to connect the left channel (L), right channel (R), "+" (red) and "–" (black) in accordance with the markers on
this unit, the speakers, and the speaker cables. If the connections are faulty, no sound will be heard from the speakers,
and if the polarity of the speaker connections is incorrect, the sound will be unnatural and lack bass.
CAUTION
• Use speakers with the specified impedance shown on the rear panel of this unit.
• Do not let the bare speaker wires touch each other or any metal part of this unit. This could damage this unit
and/or the speakers.
10 mm (3/8")
1
Red: positive (+)
Black: negative (–)
Banana plug
(With the exception of U.K. and Europe models)
I IMPEDANCE SELECTOR switch
WARNING
Do not change setting of the IMPEDANCE SELECTOR switch when the unit power is switched on, as doing so may
damage the unit. If this unit fails to turn on when STANDBY/ON (or SYSTEM POWER) is pressed, the
IMPEDANCE SELECTOR switch may not be fully slid to either position. If this is the case, slide the switch all the
way to either position when this unit is in standby mode. Be sure to move this switch only when this unit is in
standby mode.
Select the switch position (left or right) according to the impedance of the speakers in your system.
(General model)
IMPEDANCE SELECTOR
SET BEFORE POWER ON
MAIN A OR B : 4ΩMIN. /SPEAKER MAIN A OR B : 8ΩMIN. /SPEAKER
A+B : 8ΩMIN. /SPEAKER A+B : 16ΩMIN. /SPEAKER
CENTER : 6ΩMIN. /SPEAKER CENTER : 8ΩMIN. /SPEAKER
REAR CENTER : 6ΩMIN. /SPEAKER REAR CENTER : 8ΩMIN. /SPEAKER
REAR : 6ΩMIN. /SPEAKER REAR : 8ΩMIN. /SPEAKER
IMPEDANCE SELECTOR
switch
16
2
4
3
5
Switch Speaker
position
Main
Left
Center,
Rear Center,
Rear
Main*
Right
Center,
Rear Center,
Rear
* [Canada model only]
When the switch is set to right, you cannot use "A+B".
A speaker cord is actually a pair of insulated cables
running side by side. One cable is colored or shaped
differently, perhaps with a stripe, groove or ridge.
1
Remove approximately 10 mm (3/8") of
insulation from each of the speaker cables.
2
Twist the exposed wires of the cable
together to prevent short circuits.
3
Unscrew the knob.
4
Insert one bare wire into the hole in the side
of each terminal.
5
Tighten the knob to secure the wire.
y
(With the exception of U.K. and Europe models)
• You can also use banana plug connectors. First, tighten the
knob and then insert the banana plug connector into the end of
the corresponding terminal.
Impedance level
If you use one/two set(s) of main speakers, the impedance of
each speaker must be 4 Ω/8 Ω or higher.
The impedance of each speaker must be 6 Ω or higher.
If you use one/two set(s) of main speakers, the impedance of
each speaker must be 8 Ω/16 Ω or higher.
The impedance of each speaker must be 8 Ω or higher.