Mackie 406M, Owner'S Manual

Page: 24 / 36

24
When a 1/4" plug is inserted in the POWER
AMP IN jacks, the internal connection between
the mixer section and the amplifier section is
cut.
This completely separates the mixer from
the amplifiers, and it allows you to connect an
external equalizer, compressor or effects pro-
cessor in-line between them as shown.
With a plug inserted in the POWER AMP IN
jacks, the amplifiers will only play the external
signals plugged into them. With no plug in-
serted, the mixer section and the amplifier
section are joined and the amplifiers play the
mixer signals as normal.
External equalizer,
compressor, or processor
OUT IN
L MIXER OUT R MIXER OUT COMPRESSOR
L POWER
AMP IN
R POWER
AMP IN
MONITOR
MAINS
TAPE IN
TAPE OUT
LEVEL
+15
U
O O
LINE
L R
R
L
OUT
408S
IN
OUT
2 X 250W STEREO
If you have an external device in-line as
shown in the diagram above, make sure it does
not increase the signal gain too much, or it may
overload the amplifier section. The PPM
meters only show the signal level coming from
the internal mixer section; they will not show
any changes in gain due to the external device.
You might use these inputs to connect the
outputs from the opening band’s mixing board.
This way you don’t have to set up two sets of
speakers; the other band can plug right into
the PPM Series and use its amplifiers and con-
nected speakers (see application diagram on
page 13).
MIXER LINE OUT
This is a 1/4" connector that produces an
unbalanced line-level signal. This signal is fed
from the internal mixer bus, just after the
MAIN MASTER
control and
MAIN EQUALIZER
,
and just before the
POWER AMP IN
jacks.
You can use the
MIXER
LINE OUT
s to connect a sec-
ond power amplifier, giving
you the option of adding more
power and more speakers
(see application diagram on
page 10).
MONITOR LINE OUT
This is a 1/4" connector
that produces an unbalanced
line-level signal. This signal is
fed from the internal monitor
bus, just after the
MONITOR MASTER
control
and
MONITOR EQUALIZER
.
Use this connection to drive an external
monitor amplifier and speakers, or to supple-
ment the PPM Series’ monitor amplifier (when
the
POWER AMP ROUTING
switch is
pushed in) with another amplifier and speakers
(see application diagram on page 8).
TAPE IN and TAPE OUT
These are unbalanced RCA-type connectors
that match those typically used on tape decks
and CD players. Use RCA-to-RCA patch cables
to make these connections.
EFX FOOT
SWITCH
RETURN
SEND
MIXER LINE OUT
POWER
AMP 1 IN
POWER
AMP 2 IN
EFFECTS
(OVERRIDES INTERNAL EFX) MONITOR
MAINS
TAPE IN
TAPE OUT
LEVEL
+15
U
O O
LINE
L
R
R L
OUT
POWER AMP ROUTING
AMP 1
MAIN
MAIN MONITOR
AMP 2
MAIN
COMPRESSOR
IN
OUT
2 X 250 WATTS
408M
Mono Version Connector Section