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HR84 MK
HR824 MK2
+2 dB
0
2
3
1
–2 dB
HIGH FREQ.
CLIP SENSE
CLIP SENSE
CIRCUIT
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
TO CLIP
SENSE
HI-FREQUENCY
POWER AMPLIFIER
HI-FREQUENCY
DRIVER
LO-FREQUENCY
DRIVER
TWEET
HF OUT
LF OUT
MUTE
37Hz (NORMAL)
80Hz
LOW FREQ
47Hz
TO CLIP
SENSE
LO-FREQUENCY
POWER AMPLIFIER
MUTE
SENSE
RESISTOR
BASS CONTROL SERVO LOOP
MOTION DETECTOR
WOOF
+
–
MID VDC
+
–
LO VDC
+
–
HI VDC
TOROIDAL POWER
TRANSFORMER
FUSE
V
ref
ON
AUTO
STANDBY
+15VDC
SIGNAL
SENSE
MUTE
ON/OFF
CONTROL
MUTE
THERMAL
SWITCH
LOW AC
VOLTS SENSE
POWER SWITCH
(FRONT PANEL)
POWER
MODE
SWITCH
POWER RING
(POWER = WHITE
OVERLOAD = RED)
HIGH = MUTE OFF
LOW = MUTE ON
MACKIE
HR824 MK2
BLOCK DIAGRAM
(030207)
OUTER SPACE
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 jurisdications. 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.
HR824 MK2 design protected under the following pat-
ent: DES. 387,351
HR84 MK Block Diagram
©2007 LOUD Technologies Inc. All Rights Reserved.