Rear Panel - Yamaha EMX640 Owner's Manual

The nominal input level and impedance are –
10 dB/600 for the AUX IN jack, and –10 dBV/
600 for the TAPE IN jacks.
6
External output jacks (REC OUT/MONI-
TOR/MAIN)
These are output jacks which send line level sig-
nals from the EMX640 to external devices. A ste-
reo recording device such as a cassette recorder or
MD recorder can be connected to the REC OUT
jacks, and a playback device such a power amp
can be connected to the MONITOR and MAIN
jacks. The signals sent from each jack are as fol-
lows.

Rear panel

1
Speaker output jacks (POWER AMP 1 A/B,
POWER AMP 2 A/B, BRIDGE)
Speakers can be connected to these jacks. The
EMX640 contains a two-channel power amp, and
the two channels can be used independently
(maximum output 200 W+200 W) or in bridge
connection (maximum output 400 W).
If the two channels are used independently, two
speakers can be connected to the POWER AMP 1
A/B jacks and two more to the POWER AMP 2 A/
B jacks, for a total of four speakers. If the two
channels are used in a bridge connection, only
one speaker can be connected to the BRIDGE
jack.
If you wish to use the two channels indepen-
dently, but only connect a speaker to the A jack or
B jack, use a 4~8 speaker. When using the A
and B jacks simultaneously, connect 8~16
speakers. In this case, be careful not to connect a
speaker to the BRIDGE jack.
The nominal output level and impedance are –
10 dBV/10 k for the REC OUT jacks, and
+4 dB/10 k for the MONITOR/MAIN jacks.
1
SPEAKERS
B A
POWER AMP 2 BRIDGE
POWER
2
ON / OFF
If you are connecting a speaker to the BRIDGE
jack, use a 8~16 speaker. In this case, be careful
not to connect a speaker to the POWER AMP 1/2
A/B jacks.
Caution:
When using a bridge connection, do not con-
nect anything to the POWER AMP 1 and
POWER AMP 2 jacks. Likewise, when using the
POWER AMP 1 and/or POWER AMP 2 jacks,
do not connect anything to the BRIDGE jack.
2
Power switch
This switch turns the power of the EMX640 on/
off.
• REC OUT jacks: The MAIN bus signal
before it has passed through the MASTER
control and graphic equalizer
• MONITOR jack: The MONITOR bus signal
which has passed through the Monitor MAS-
TER control and graphic equalizer
• MAIN jack: The MAIN bus signal which has
passed through the Main MASTER control
and graphic equalizer
B A
POWER AMP 1
Note: Use the power amp select switch (control
panel J) to select the signal which is sent to the
jacks, or to activate the bridge connection.
Note: Before turning the EMX640 on/off, turn
down the MASTER controls of the MONITOR
and MAIN section.
7
Rear panel
EMX640—Owner's Manual