7
M1224FX / M1424 / M1624FX / M1824 Front Panels
(12). CTRL ROOM /PHONES CONTROL
Controls the level of the signal output to the
PHONES jack and the CTRL ROOM L and R
jacks.
(13). TAPE IN CONTROL
This control adjusts the level of the playback sig-
nal that is inserted to the master mixing bus from
the TAPE IN RCA jacks on the top panel.
14. MASTER SEND
* Master AUX Control
Adjust the level of the signal on the AUX bus to
the corresponding AUX SEND jack.
* Master EFX Control
Adjust the level of the signal on the EFX bus.
This is the signal that is output through the EFX
SEND jack.
15. PFL INDICATOR
This indicator lights when the PFL switch is
turned on.
16. OUTPUT LEVEL METER
A vertical row of ten LED show the continuous
output level of main Output L/R or monitor 1/2 by
signal select switch.
This type of display is free from over shoot prob-
lem of mechanical meters and is highly visible
under poor lighting conditions. The 0 LED means
an output level of +4dB, for +4dB output-that’s
the rated level.
17. STEREO RETURN CONTROL
* AUX CONTROL
Adjust the level of the mixed L/R signal sent from
the RETURN jack (L (MONO) and R) to the AUX
bus.
* MAIN CONTROL
Adjust the level of the mixed L/R signal sent from
the RETURN jack (L (MONO) and R) to the Main
L/R bus.
18. POWER INDICATOR
This indicator lights when the power switch is
turned on.
19. PHANTOM POWER SWITCH
This switch toggles phantom power on/off. If you
set the switch on, the mixer supplies power to all
channels that provide XLR mic input jacks.
Set this switch on when using one or more con-
denser microphones.
NOTE:When this switch is on, the mixer supplies
DC +48V power to pins 2 and 3 of all XLR-type
MIC INPUT jacks.
Front Panels Controls
11. Level-Meter Signal Switches (MAIN-ALT3/4
Toggle Switch and TAPE IN Switch)
These level-meter switches, together with the
channel PFL switches, select the signal that is
sent through the CTRL ROOM/PHONES control
to the CTRL ROOM OUT jacks, the PHONES
jack, and the level meter.The following illustration
shows how the switch settings correspond to the
signal selection.
Signal Switch PFL TAPEIN ALT3 / 4
PFL ON
TAPE IN
OFF
OFF
OFF
ALT3/4
MAIN
ON
ON
C-R OUT
&
PHONES
Be sure to leave this switch off ( ) if you
do not need phantom power.
When tuning the switch on ( ), be sure
that only condenser mics are connected to
the XLR input jacks.
Devices other than condenser mics may
be damaged if connected to the phantom
power supply. Note, however, that the
switch may be left on without problem
when connecting to balanced dynamic
microphones.
To avoid damage to speakers, be sure to
turn off amplifier (on powered speakers)
before turning this switch on or off. We
also recommend that you turn all out con-
trols (MAIN master fader, ALT3/4 fader,
etc.) to minimum settings before operat-
ing the switch, to avoid risk of loud noises
that could cause hearing loss or device
damage.
(20).PHANTOM POWER INDICATOR
This indicator lights when the phantom power
switch is turned on.
*
*
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