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Mackie TH-18s Features
2. POWER
Press up on this switch to turn the TH-18s subwoofer
on. The power LED [11] above the LEVEL knob [7]
illuminates when the POWER switch is on and AC power
is available at the linecord socket.
Press the bottom of this switch to put the subwoofer
into standby mode. It will not function, but the circuits
are still live. To remove AC power, either turn off the
AC mains supply, or unplug the power cord from the
subwoofer and the AC mains supply.
As a general guide, powered
subwoofers should be turned on after
the mixer and other sources, but prior
to full-range speakers. Additionally, they
should also be powered off after the tops,
but before the mixer and other sources. This will reduce
the possibility of any turn-on, or turn-off thumps in your
speakers.
The rear panel is where you connect AC power
and your signals to and from the subwoofer. You may
also adjust the level and polarity to match the other
loudspeakers in your system and account for the
subwoofer’s location and your room’s environment.
1. IEC AC Receptacle and Fuse
Connect the detachable line cord to this IEC socket
securely, and plug the other end into an AC outlet.
Make sure the AC power is matched to the AC power
indicated on the rear panel above the IEC socket.
The fuse is located behind the fuse cover, at the
bottom of the IEC socket. See the “Troubleshooting”
section on page 13 for information about replacing the
fuse.
Always turn off the power and disconnect
the power cord before inspecting or
changing the fuse. Always replace the fuse
with the exact same type and rating as the
original fuse.
TH-18s
ACTIVE SOUND
REINFORCEMENT SUBWOOFER
RE VI SI ON
SE RI AL N UM B ER
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR
MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
AVIS:
RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR
POWER
ON
BA
INPUTS
B
A
B
A
OUTPUTS
HIG H PASS
FUL L RANGE
LEVEL
OL SIGNAL POWER
POLARITY
NORMAL
INVERT
THERMAL
R
+6dB 6dB
-
118
7
6
5
4
3
9 10
2 1