(/
?I-)+DB)
?I-
)+DB)
+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)
The following are trademarks or registered trade-
marks of LOUD Technologies Inc.: The Mackie logo, HR
Series, Zero Edge Baffle, and the Running Man.
THX and pm3 are trademarks of THX Ltd. which may
be registered in some jurisdictions. All rights reserved.
Lucasfilm is a trademark of Lucasfilm Ltd.
This manual also contains names and marks of other
companies which belong to those respective companies,
and are hereby acknowledged.
HR624 MK2 design protected under the following pat-
ent: DES. 387,351
?I-)+DB)9cfZb;`X^iXd
©2007 LOUD Technologies Inc. All Rights Reserved.
