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HD1801
HIGH-DEFINITION POWERED
SUBWOOFER
18 -INCH HIGH DEFINITION POWERED SUBWOOFER
SETTINGS
POWER
LIGHT ON
SIG/ LIMIT
THERMAL
LEVEL
POLARITY
INVERT
FULL RANGE
HIGH PASS
OUTPUTS
A
B
A
B
A
B
INPUTS
+
6dB
6dB
-
HD1801
Relative Magnitude (dB)
Frequency (Hz)
10
100
1000
+10
0
-10
-20
-30
-40
-50
LEVE
L
+
6d
B
6d
B
-
Input
XLRs
High P
ass
Output XLRs
F
ull R
ange
Output XLRs
C
ro
ss
o
ve
r
Signal /
Limit LED
Thermal
LED
Polarity
In
ve
rt
LED
LPF
100 Hz
O
ve
re
xcursion
Pr
otec
tion
HPF
40 Hz
Thermal
Monitoring
A
m
p
Limiter
Polarity
In
ve
rt
Thermal
M
u
te
Normal
In
ve
rt
ed
Gain
HD
Su
b
w
o
o
fer
Pr
ocessing
C
ro
ss
o
ve
r
HPF
100 Hz
C
ro
ss
o
ve
r
HPF
100 Hz
HD1801 BLOCK DIAGRAM
HD1801 FREQUENCY RESPONSE
HD1801 INPUT PANEL
