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TECHNICAL INFORMATION
HRS120 Block Diagram
2
3
1
RIGHT
LINE INPUT
2
3
1
LEFT/MONO
LINE INPUT
CROSSOVER
FREQ
CROSSOVER
FREQ
FILTER
SELECT
FILTER
BYPASS
55Hz-110Hz
24 dB/OCT LINKWITZ-RILEY
CENTER POSITION (80Hz) FOR THX
110Hz
42 dB/OCT ELLIPTICAL
LPF (FOR AC-3/DTS)
15Hz
18 dB/OCT
BUTTERWORTH
LPF
A
B
CTL
OUT
A
B
CTL
OUT
A
B
CTL
OUT
2
3
1
LEFT/MONO
LINE OUTPUT
2
3
1
RIGHT
LINE OUTPUT
55Hz-110Hz
FILTER IN
SUBSONIC
FILTER
LFE
GAIN
15Hz
FLAT (THX)
+10 dB
Av = 10 dB
0 dB (THX)
POLARITY
COMPRESSOR
ACE-BASS EQ
POWER
AMPLIFIER
INPUT
SENSITIVITY
(CW = THX)
180º
0º (THX)
INOUT
POWER SUPPLY TRACKING/
PEAK POWER LIMITER
FAST ATTACK/SLOW RELEASE
FULL RANGE
(THX)
110Hz
ELLIPTICAL
+70V
+60V
–60V
–70V
SENSE
RESISTOR
SUBWOOFER
2
3
1
MASTER
OUTPUT
2
3
1
SLAVE
INPUT
SUBWOOFER
BYPASS
FOOTSWITCH
NOTE: WHEN USED AS A SLAVE,
THE MASTER OUTPUT OF THE FIRST
SUB DRIVES THIS INPUT.
"POLARITY" AND "INPUT SENSITIVITY"
ONLY ARE ACTIVE ON THIS INPUT.
OPEN = HPF FROM CROSSOVER AT LEFT AND RIGHT OUTPUTS
SUBWOOFER ACTIVE
REMOTE INDICATOR SWITCH OPEN
CLOSED = FULL-RANGE SIGNAL FROM INPUTS AT LEFT AND RIGHT OUTPUTS
SUBWOOFER MUTED
REMOTE INDICATOR SWITCH CLOSED
FUSE
SUBWOOFER
BYPASS
REMOTE
INDICATOR
CLOSED WHEN SUBWOOFER IS MUTED
MAXIMUM VOLTAGE ALLOWED ACROSS
OPEN CONTACTS = 24V
MAXIMUM CURRENT ALLOWED THROUGH
CLOSED SWITCH = 1A
THE POTENTIAL ON THESE TERMINALS MUST BE
FLOATING OR REFERENCED TO SAFETY GROUND
SUB
BYPASSED
+5V
POWER
INPUT SIGNAL DETECTOR
WHEN SIGNAL IS PRESENT THE OUTPUT IS ACTIVE.
OUTPUT REMAINS ACTIVE FOR SEVERAL MINUTES AFTER
SIGNAL IS REMOVED.
OUTPUT IS INACTIVE WHEN NO SIGNAL IS PRESENT AND
BECOMES ACTIVE AFTER SIGNAL RETURNS.
IN OUT
MACKIE DESIGNS
HRS120 THX
BLOCK DIAGRAM
(#110501DF)