SPL 18 Owner's Manual v 1.1 ©1999 ARX®
SPL 18 Owner's Manual v 1.1 ©1999 ARX®
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BALANCED INPUT CONNECTORS 3 pin female XLR type connectors receive the input signal -
typically from the effects rack or mixing console. Internal circuitry will AutoSum to mono if both A
and B inputs are used. Wired Pin 1 Ground, Pin 2 + (Hot) Pin 3 – (Cold)
LOOP OUTPUTS 3 pin male XLR type connector sends the signal on to another cabinet if
required. Wired the same as the input
LEVEL CONTROL Adjusts the volume of the SPL 18; variable from –10 to +6 dB SPL
CABINET SETTINGS SWITCH Switched to Normal if being used with other ARX SPL cabinets
(eg SPL 12), but may need switching the Phase Reverse if used with other brands
SYSTEM PROTECT LED This LED will illuminate if the amplifier has encountered a problem.
Switch off AC power, wait 15 seconds, and switch back on. If the problem was temporary, the
cabinet will now operate. If not, arrange for a service inspection
AC POWER SWITCH and LED This LED illuminates when cabinet is connected to AC Power and
switched ON
CIRCUIT BREAKER This will trip to protect the internals if the cabinet encounters AC power
problems. Press the RED button IN to reset. If it continues to trip, remove the cabinet from use
and arrange for checking by an authorised ARX service centre. Please don’t try to take the
cabinet apart yourself - there are no user-serviceable parts inside, but there are dangerous
voltages, even after the cabinet has been switched off and disconnected
AC POWER INPUT AND OUTPUT The input connector is designed to receive the Neutrik
PowerCon NAC3FA. This is a fully safety approved latching ‘twist-and-lock’ AC connector. For
looping power to another SPL series cabinet, a complementary output connector, the NAC3FB, is
also provided.
WARNING MESSAGES These could save your life and other people’s. Please read them
carefully. Never poke around inside the cabinet, even when it is switched off. The SPL 18 is
designed for floor stacking only; no flying points are fitted. If flying is required, contact ARX
directly or your ARX distributor
SERIAL NUMBER Unique to your SPL 18. Please use it in any correspondence with ARX
AC VOLTAGE This will indicate the voltage that the cabinet is expecting to see on the AC power
connectors. Please ensure that it is correct for your area before plugging it in!
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SPL 18 REAR PANEL
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Setting up and using the SPL 18
The SPL 18 is very straightforward to setup and start using, but a few basic steps should
be followed.
1. Connect the signal and power cables to the SPL18(s) before switching it on.
2. Connect and switch on all preceding equipment (mixer, EQs, etc) before switching
on the SPL 18(s), but make sure their level controls are pulled down. The SPL 18
will switch itself on and off silently, but will reproduce (at very high SPL!) whatever
switch-on noise or signal that is sent to it.
Positioning the cabinet
Being a Bass/Sub-Bass cabinet, the SPL 18 is non-direc-
tional in terms of Low Frequency dispersion. To increase
overall Low Frequency Sound Pressure Level, multiple SPL
18 cabinets can be arrayed side by side or stacked as
required
SPL 12 active 2 way cabinets can be stand mounted on top
of the SPL 18 Sub using the optional pole mounting kit Part
# SPL-PMK-1 (see pic below left).
Do NOT fly the SPL 18
The SPL 18 is not fitted with any flying/rigging points, and is
designed to be ground stacked rather than flown.
Should flying the cabinet be essential, DO NOT FIT FLYING
POINTS YOURSELF, but contact ARX directly or your ARX
distributor for details of the procedure to be followed. See
contact details on page 8.
IMPORTANT SAFETY NOTE
Flying any speaker cabinet is dangerous if done by
inexperienced operators and/or when using the wrong
equipment. Ensure all rigging is safety rated to a minimum
of 5 x the weight of the cabinet to be flown, and is done by
licensed riggers.
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