Rear Panel Description - Mackie SWA1801z User Manual

REAR PANEL DESCRIPTION

POWER Switch
Use this switch to turn the SWA1801z on and
off. Make sure the signal source's level control is
turned down before you turn it on.
AC Receptacle
This is where you connect the AC linecord to
provide AC power to the SWA1801z's built-in pow-
er amplifiers. Plug the linecord into an AC socket
properly configured for your particular model.
LIMIT Indicator
The SWA1801z has a built-in limiter that pre-
vents the amplifier outputs from overdriving the
transducers. The LIMIT indicator lights when the
limiter is activated. It's okay for the LIMIT indica-
tor to blink occasionally, but if it blinks frequently
or lights continuously, turn down the level control
until the LIMIT indicator only blinks occasionally.
SIGNAL Present Indicator
This LED illuminates whenever there is a
signal present at the FULL RANGE INPUT con-
nector on the rear panel.
THERMAL Indicator
The SWA1801z has a thermal protection
circuit that monitors the internal temperature
of the amplifiers and heatsink. If the internal
temperature should exceed a safe operating level,
this indicator lights and the signal is muted to al-
low the amplifier to cool. When the temperature
cools to a safe level once again, the thermal pro-
tection circuit deactivates and normal operation
resumes.
Note: Activation of the thermal protection cir-
cuit is an indication that you should take steps to
avoid continued thermal problems. See "Thermal
Considerations" on page 7.
POWER
SWA1801z
ACTIVE SUBWOOFER
60Hz-115V-AC FUSE AC125V-T8AL
DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA
©2005 LOUD TECHNOLOGIES INC.
"MACKIE" AND THE "RUNNING MAN" FIGURE ARE REGISTERED TRADEMARKS OF
LOUD TECHNOLOGIES INC.: • PATENT PENDING
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
REPLACE WITH THE SAME TYPE FUSE AND RATING.
DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE
SERIAL NUMBER
4
the linecord is connected to an active AC power
supply, this indicator lights green to let you know
that you're ready to rock and roll. The cool blue
LED on the front of the cabinet works in the
same way.
accept a balanced line-level signal from a mixing
console or other signal source.
duce exactly the same signal that is connected
to the FULL RANGE INPUT jack. Use it to daisy-
chain several SWA1801z's together off the same
signal source.
produce the frequencies above 120Hz. Connect
these to a pair of full-range active speakers or to
an amplifer/passive speaker combination. The
SWA1801z reproduces the frequencies below
120Hz.
detent position provides 15 dB of headroom with
a nominal +4 dBu input signal. Use this as a
starting point for setting the balance between the
subwoofer and the main speakers.
woofer output. Depending on the placement of
the SWA1801z subwoofer relative to the full-range
speakers, you may get a better low-frequency re-
sponse in the room if you reverse the polarity of the
subwoofer's signal. Experiment with this switch to
determine which position sounds best.
ON
WARNING:
THIS SURFACE MAY REACH HIGH TEMPERATURE DURING
STANDARD USE. TO ENSURE PROPER OPERATION ALLOW A MINIMUM OF 6 INS.
OF CLEARANCE FROM THIS SURFACE AND ADEQUATE VENTILATION. TO REDUCE
THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THIS PANEL OR ANY ATTACHED
COMPONENT. NO OPERATOR SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL. TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
AVIS:
RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR
UTILISE UN FUSIBLE DE RECHANGE DE MÊME TYPE.
DEBRANCHER AVANT DE REMPLACER LE FUSIBLE
MANUFACTURING DATE
POWER Indicator
When the POWER switch is turned on and
FULL RANGE INPUT
These are female XLR-type connectors that
THRU (FULL RANGE OUTPUT)
These are male XLR-type connectors that pro-
HIGH PASS (MID/HIGH FREQ) OUTPUT
These are male XLR-type connectors that
SUBWOOFER LEVEL Control
This adjusts the subwoofer level. The center
PHASE
This switch reverses the polarity of the sub-
LIMIT SIGNAL THERMAL
PARALLEL
SUBWOOFER
THRU FULL RANGE CONTROL
(FULL RANGE OUTPUT) INPUT
NORMAL
(+4dBu )
L
+15
O O
SUBWOOFER
LEVEL
IN
REV 180
PHASE
R
NORMAL
POWER
HIGH PASS
(MID/HIGH FREQ)
OUTPUT
120Hz
L
OUT
R