MACKIE 18" Powered Subwoofer HD 1801 - Manual (Page 19)

LEVEL
+
6d
B
6d
B
-
Input XLRs
High P
ass
Output XLRs F
ull R
ange
Output XLRs
Crossove
r
Signal / Limit LED
Thermal LED
Polarity In
ve
rt
LED
LPF 100 Hz
O
verex
cursion
Pr
otec
tion
HPF 40 Hz
Thermal
Monitoring
A
m
p
Limiter
Polarity
In
ve
rt
Thermal Mute
Normal In
ve
rt
ed
Gain
HD Subwoof
er
Pr
ocessing
Crossove
r
HPF 100 Hz
Crossove
r
HPF 100 Hz
19
Owner’s Manual
Owner’
s Manual
HD1801 Block Diagram