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O F 8 P A G E S
M•1400/M•1400i
High-Current Power Amplier
O F 8 P A G E S
M•1400/M•1400i
High-Current Power Amplier
O F 8 P A G E S
M•1400/M•1400i
High-Current Power Amplier
M•1400/M•1400i
High-Current Power Amplifer
O F 8 P A G E S
4
M•1400/M•1400i
Block Diagram
CH 1
BALANCED
LINE INPUT
(TRS
)
CH
1
BALANCED
LINE INPUT
(XLR-F)
LIMITER
LIMITER
ON
OFF
LOW CUT
FILTER
LOW PASS
FILTER
(SUBWOOFER)
+
–
80 VDC
+
–
90 VDC
TO
ROIDAL POWER
TRANSFORMER
LAMP
FUSE
MACKIE DESIGNS
M•1400i
BLOCK DIAGRAM
(#022598DF)
FREQ
CD EQ
FREQ
OUTPUT
APPLICATION
SWITCH
AMP
MODE
SWITCH
63 Hz
125 Hz
FREQ
TO
LIMITER
ON
OFF
LOW CUT
FILTER
FREQ
CD EQ
FREQ
CH 1
GAIN
STEREO
MONO
BRIDGE
CH
2
GAIN
INVERTING
UNITY GAIN
AMPLIFIER
ON
OFF
SUB
ON
OFF
SUB
NC
NC
NC
MUTE
CH 1
PR
OTECT
LED
CH 1
SHOR
T
LED
MUTE
CH
2
PR
OTECT
LED
POWER
AMPLIFIER
FUSE
–80VDC
FUSE
+80VDC
DC OFFSET
DETECT
SHORT
DETECT
METER
DRIVE
POWER
AMPLIFIER
FUSE
–80VDC
FUSE
+80VDC
DC OFFSET
DETECT
TO CH 1
MUTE
OL
–3
–6
–9
–20
SIG
CH 1
SIG
CH 2
SHOR
T
LED
SHORT
DETECT
METER
DRIVE
TO CH 2
MUTE
TO CH
1
MUTE
TO CH
2
MUTE
OL
–3
–6
–9
–20
SIG
CH 2
SIG
SIG
(TO CH
1
METER DRIVE)
SIG
(TO CH
2
METER DRIVE)
PD's LEASH
HOT
LED
COLD
LED
TEMP
SENSOR
(ON HEA
TSINK)
FROM CH 1
SHORT DETECT
FROM CH
2
SHORT DETECT
CH
1
MUTE
CONTROL
CH
2
MUTE
CONTROL
4 SEC DELA
Y
(TURN-ON)
CH 1 AMP OUT
CH 2 AMP OUT
PROGRAM
DETECT
AND
OR
60ºC
DETECTOR
FAN
SPEED
CONTROL
HI DCV
LO DCV
CH 1
MUTE
CH 2
MUTE
POWER
SWITCH
TO CH 1
AND CH 2
MUTE
THERMAL
PROTECT
THR
U
(XLR-M)
CH 2
BALANCED
LINE INPUT
(TRS
)
CH
2
BALANCED
LINE INPUT
(XLR-F)
THRU
(XLR-M)
80ºC MUTE
55ºC UNMUTE
FA
N
CH 1
SPEAKER
OUT
CH 2
SPEAKER
OUT