Onkyo HT-R640 - Manual (Page 20)

20
Connecting the AV Receiver —Continued
Speaker Connection Precautions
Read the following before connecting your speakers:
• Only connect speakers with an impedance of 6 ohms
or higher. If you use speakers with a lower impedance,
and use the amplifier at high volume levels for a long
period of time, the built-in protection circuit may be
activated.
• Disconnect the power cord from the wall outlet before
making any connections.
• Read the instructions supplied with your speakers.
• Pay close attention to speaker wiring polarity. In other
words, connect positive (+) terminals only to positive
(+) terminals, and negative (–) terminals only to nega-
tive (–) terminals. If you get them the wrong way
around, the sound will be out of phase and will sound
unnatural.
• Unnecessarily long, or very thin speaker cables may
affect the sound quality and should be avoided.
• Be careful not to short the
positive and negative wires.
Doing so may damage the AV
receiver.
• Make sure the metal core of the
wire does not have contact with
the AV receiver’s rear panel.
Doing so may damage the AV
receiver.
• Don’t connect more than one cable to each speaker
terminal. Doing so may damage the AV receiver.
• Don’t connect one speaker to several terminals.
Connecting the Speaker Cables
The following illustration shows which speaker should
be connected to each pair of terminals.
1 Strip about 5/8" (15 mm)
of insulation from the
ends of the speaker
cables, and twist the bare
wires tightly, as shown.
2 Unscrew the terminal.
3 Fully insert the bare
wires.
4 Screw the terminal tight.
5/8" (15 mm)
Center
speaker Front left
speaker Front right
speaker
Surround
right
speaker Surround
left
speaker