1
HR64 MK
HR624 MK2
+2 dB
0
2
3
1
–2 dB
HIGH FREQ.
HF TRANSDUCER
THERMAL MODELER
BALANCED
LINE
INPUTS
UNBALANCED
LINE
INPUT
SENSITIVITY
COMPRESSOR
CROSSOVER
HI-FREQ
WHOLE
HALF
QUARTER
ACOUSTIC
SPACE
LO-FREQ
SENSITIVE
CALLOUS
HF OUT
LF TRANSDUCER
THERMAL MODELER
LF OUT
HI-FREQUENCY
POWER AMPLIFIER
HI-FREQUENCY
DRIVER
LO-FREQUENCY
DRIVER
TWEET
HF OUT
LF OUT
MUTE
49Hz (NORMAL)
80Hz
LOW FREQ LO-FREQUENCY
POWER AMPLIFIER
MUTE
SENSE
RESISTOR
BASS CONTROL SERVO LOOP
MOTION DETECTOR
WOOF
+
–HI VDC
+
–LO VDC
TOROIDAL POWER
TRANSFORMER
FUSE
Vref
ON
AUTO
STANDBY
+15VDC
SIGNAL
SENSE
MUTE
ON/OFF
CONTROL
MUTE
THERMAL
SWITCH
LOW AC
VOLTS SENSE
POWER SWITCH
(FRONT PANEL)
POWER
MODE
SWITCH
HIGH = MUTE OFF
LOW = MUTE ON
MACKIE
HR624 MK2
BLOCK DIAGRAM
(030507)
OUTER SPACE
120V ↔ 240V
FUSE
POWER RING
(POWER = WHITE
OVERLOAD = RED)