CH 1
B
ALANCED
LINE INPUT
(T
R
S
)
CH 1
B
A
LANCED
LINE INPUT
(XLR
-F)
LIMITER
LIMITER
ON
OFF
LOW CUT
FIL
TER
LOW P
ASS
FIL
TER
(SUBWOOFER)
+
–
80 VDC
+
–
90 VDC
TO
R
O
ID
AL P
OWER
TRANSFORMER
LAMP
FUSE
MA
CKIE DESIGNS
M•1400i
BL
OCK DIA
G
RAM
(#022598DF)
FREQ
CD EQ
FREQ
OUTPUT
APPLIC
A
TION
SWIT
C
H
AMP
MODE
SWIT
C
H
63 Hz
125 Hz
FREQ
TO
LIMITER
ON
OFF
LOW CUT
FIL
TER
FREQ
CD EQ
FREQ
CH 1
GAIN
S
TEREO
MONO
BRIDGE
CH 2
GAIN
INVER
TING
UNIT
Y
GAIN
AMPLIFIER
ON
OFF
SUB
ON
OFF
SUB
NC
NC
NC
MUTE
CH 1
PR
O
TECT
LED
CH 1
SHOR
T
LED
MUTE
CH 2
PR
O
TECT
LED
P
O
WER
AMPLIFIER
FUSE
–80VDC
FUSE
+80VDC
DC OFFSET
DETECT
SHOR
T
DETECT
METER
DRIVE
P
O
WER
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
SHOR
T
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
(T
O CH 1
METER DRIVE)
SIG
(T
O CH 2
METER DRIVE)
PD's LEASH
HO
T
LED
COLD
LED
TEMP
SENSOR
(ON HEA
TS
INK)
FR
OM CH 1
SHOR
T DETECT
FR
OM CH 2
SHOR
T DETECT
CH 1
MUTE
CONTR
O
L
CH 2
MUTE
CONTR
O
L
4 SEC DELA
Y
(T
URN-ON)
CH 1 AMP OUT
CH 2 AMP OUT
PR
OGRAM
DETECT
AND
OR
60ºC
DETECT
O
R
FA
N
SPEED
CONTR
O
L
HI DCV
LO
DCV
CH 1
MUTE
CH 2
MUTE
P
OWER
SWIT
C
H
TO
CH 1
AND CH 2
MUTE
THERMAL
PR
O
TECT
THR
U
(XLR
-M)
CH 2
B
A
LANCED
LINE INPUT
(T
R
S
)
CH 2
B
ALANCED
LINE INPUT
(XLR
-F)
THR
U
(XLR
-M)
80ºC MUTE
55ºC UNMUTE
FA
N
TO
HUSKY
S
TADIUM
CH 1
SPEAKER
OUT
CH 2
SPEAKER
OUT
OL
–3
–6
–9
–20
–3
–6
–9
–20
SIG
OL
SIG
CH
1
30
28
26
20
22
18
24
16
14
8
0 0
1.23v (+4dBu)
SENSITIVITY
GAIN/dB
CH
2
PROTECT
COLD
HOT
SHORT
TEMP STATUS
INTERNAL STATUS
CH
1
CH
2
CH
1& 2
ON
OFF
POWER
3v
2v
1v
30
28
26
20
22
18
24
16
14
8
0 0
1.23v (+4dBu)
SENSITIVITY
GAIN/dB
3v
2v
1v
PROFESSIONAL POWER AMPLIFIER
FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN
19.00" (48.3cm)
17.25" (43.8cm)
15.25" (38.7cm)
3.50"
(8.9cm)
2U
16.25" (41.3cm)
M•1400i
WEIGHT
36 lbs.
(16.3 kg)
1.25"
(3.2cm)
M•1400i
DIMENSIONS
BLOCK DIAGRAM
DIMENSIONS
®
