SPL SUB18 Owner's Manual v 1.2 ©2003 ARX®
SPL SUB18 Owner's Manual v 1.2 ©2003 ARX®
6
3
Introduction
Thank you for choosing this ARX SPL SUB18 Integrated Self-Powered Sub-Bass
speaker system. We hope you enjoy using it as much as we enjoyed creating it. As with
all ARX equipment, it has undergone precise factory calibration, testing and ‘burn in’
before shipping. To ensure continued trouble free use, please familiarise yourself with the
contents of this owner’s manual before using your SPL SUB18 system.
About the SPL SUB18
The SPL SUB18 represents a major change in the way we think of a speaker system. Its
internal amplifier is fully integrated with the speaker combination to create a totally
transparent, powerful and efficient ‘building block’ audio module with well defined
coverage parameters.
The subwoofer and amplifier combination uses a single 18” (460mm) long throw driver. It
is designed to provide extended low frequency from 35 Hz to 100 Hz to enhance existing
speaker systems.
The cabinet is built throughout from premium grade void free plywood, with extensive
bracing to reduce unwanted coloration, and is painted in multiple textured coats of
catalysed polyurethane.
Since its control electronics and amplifier are built-in, the SPL SUB18 is the perfect add-
on when more low frequency output is required - for any system! All that’s required to
vary the system setup are some patch leads and an AC power feed.
Inside Information
The all new amplifier design inside the SPL18 uses existing ARX proven analog amplifier
technology for predictable operation in all professional applications.
Its transformer based power supply and Mosfet drive circuitry both enable a reduced
parts count for long term reliability. Plus, with their inbuilt self regulation, Mosfets are
accepted as being the most thermally reliable and predictable amplifier output stage
available.
Benefits
The acoustic and practical benefits of this amplifier/speaker combination are many:
• Improved speaker response. The close-coupled design delivers greater actual power
at the speaker and improves the damping factor. Frequency response is optimised
and phase response is idealised with no potential for mis-adjustment
• Thermal reliability. Thanks to our unique heat exchange/cooling design, the harder
the system is driven, the more efficiently the heat exchanger operates.
• There is no power loss caused by long runs of loudspeaker cable which can typically
be 30 metres (100’) or more. All the amplifier power is delivered to the speaker.
• An elegant all in one solution - amp, processor, speaker are combined in the one
cabinet. There are no amp racks to store and cool, no heavy speaker cabling to run.
• Reduced number of connections contributes to inherent low noise, and greatly
reduces the possibility of ground loops.
To sum up, the SPL series successfully combines state of the art design with practical,
proven technology to deliver an integrated speaker/amplifier solution with all the
dynamic impact and transparent audio that today’s audiences expect.
Other Features
• Locking AC power connectors. By using the Neutrik PowerCon design, the power
connector locks to the cabinet, avoiding the problem of a normal IEC connector
vibrating loose during a performance. This can be a nuisance when the system is
ground stacked, and a
real
problem when the system is flown!
• Noiseless turn on/turn off.
As well, an extra auxiliary AC power output is fitted as standard, so that systems can be
powered in a serial/daisy chain layout rather than radially from a central point, thus
reducing the cabling required, to a maximum of 4 cabinets.
At ARX we have designed the SPL series to be a true ‘building block‘ audio system.
• It is truly cost effective, with no need for speaker cabling, extra amplifiers or amp
racks.
• Ease of installation - simply connect AC power and a signal.
• The modular concept means total flexibility, with system inventory kept at the most
efficient level. To increase or decrease the size of the system, simply add or remove
cabinets as required.
