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M•800 BLOCK DIAGRAM
CH 1
BALANCED
LINE INPUT
(TRS)
CH 1
BALANCED
LINE INPUT
(XLR-F)
LIMITER
LIMITER
ON
OFF
ON
OFF
LIMITER
SWITCH
LIMITER
DETECTION
LIMITER
DETECTION
ON
OFF
LOW CUT
FILTER
FREQ
CD EQ
FREQ
ON
OFF
LOW CUT
FILTER
FREQ
CD EQ
FREQ
CH 1
GAIN
STEREO
MONO
BRIDGE
STEREO
MONO
BRIDGE
STEREO
MONO
BRIDGE
CH 2
GAIN
INVERTING
UNITY GAIN
AMPLIFIER
DC OFFSET
PROTECT
METER
DRIVE
AMP
AMP
–64VDC
+64VDC
+74VDC
–74VDC
–64VDC
+64VDC
+74VDC
–74VDC
OL
–3
–6
–9
–20
METER
DRIVE
OL
–3
–6
–9
–20
MUTE
MUTE
THRU
(XLR-M)
CH 2
BALANCED
LINE INPUT
(TRS)
CH 2
BALANCED
LINE INPUT
(XLR-F)
THRU
(XLR-M)
MUTE
HOT
LED
NORM
LED
TEMP
SENSOR
(ON HEATSINK)
MUTE
CONTROL
4 SEC DELAY
(TURN-ON)
CH 1 AMP OUT
CH 2 AMP OUT
PROGRAM
DETECT
AND
OR
60ºC
DETECTOR
FAN
SPEED
CONTROL
HI DCV
LO DCV
80ºC MUTE
55ºC UNMUTE
FAN
TO HUSKY
STADIUM
CH 1
SPEAKER
OUT
CH 2
SPEAKER
OUT
+
–
64 VDC
+
–
74 VDC
TOROIDAL POWER
TRANSFORMER
LAMP
FUSE
POWER
SWITCH
MUTE
THERMAL
PROTECT
DC OFFSET
PROTECT