Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX®
Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX®
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Introduction
Thank you for choosing this Cinema Pro amplifier. We hope you enjoy using it as
much as we enjoyed creating it. It is a precision engineered product designed for
professional use in all pro-audio applications, and as such, a working knowledge of
basic electronic safety procedures is assumed on the part of the operator.
This amplifier has undergone extensive factory calibration, testing and ‘burn in’
before shipping. To ensure continued trouble free use, please familiarise yourself
with the contents of this manual before using.
About the Cinema Pro amplifiers
The
CP550 and CP850
amplifiers are designed for the intensive duty cycle that
today’s high standard of cinema sound demands, with the power and the protec-
tion to ensure that the show goes on. These amplifiers represent significant break-
throughs in the the art of providing effortless, reliable power from compact, efficient
amplifier designs. They incorporate rear panel level controls, toroidal transformers,
onboard crossovers, and safety approved Speakon output connectors.
For the all-important amplifier output stage, the Cinema Pro amplifiers use the new
generation Lateral Mosfet devices . These provide ultra fast high current-to-load
capability, switching many amperes of high frequency current in nanoseconds, up
to 100 times faster than amplifiers using conventional Bipolar transistors.
Our massive precision engineered UltraFin
TM
heat exchanger rapidly and evenly
dissipates heat from the amplifier. Twin cooling fans supply a high c.f.m forced air
supply to ensure optimum temperature of the output devices.
‘Headroom Enhance’
circuitry based on the core ISC error correction technology
developed for our new range of ISC Loudspeaker Processors. This provides Maxi-
mum power output levels under all AC mains supply voltages and rated load
conditions, eliminating Output Stage clipping.
All Cinema Pro amplifiers have new re-settable High Current relay switched
protection circuits that instantly disconnect the speakers if a potentially damaging
signal is detected. New Input delay muting circuitry eliminates switch on/switch off
noise. The onboard crossovers feature current “state of the art” Linkwitz Riley 24dB
per octave filter circuitry. This provides seamless filtering, low noise, ultra low
distortion, without the need for external processing.
As a company we are committed to producing amplifiers that keep going day after
day, night after night, because we know that audio professionals like yourself
depend on them to earn a living.
The Cinema Pro series is proof of that commitment.
WARNING!
THERE ARE NO USER SERVICEABLE PARTS INSIDE THE
AMPLIFIER, SO PLEASE DON’T TAKE THE LID OFF AND POKE
AROUND!
Amplifiers run on DC voltages provided by the amplifier’s internal
power supply. The Cinema Pro series have se and - DC fuses
for both channels, mounted internally on the power supply circuit
board. The power Mosfets used in the amplifiers are extremely rugged
devices, and the correct rating fuses in the power supply ensure that
the amplifier circuitry is protected from short circuit damage.
A blown DC fuse will be indicated by a very distorted low volume
output from that side of the amplifier. A blown AC fuse will be indicat-
ed by nothing working at all - check to see if the fans are turning.
Any blown fuse should be investigated. It doesn’t necessarily mean that
something is wrong with the amplifier, but indicates that there is
something wrong in the complete signal path, from the mixing console
to the speakers.
If an AC fuse blows:
• Switch the power off, replace the fuse with another of the same
rating.
• Switch the power back on.
• If it blows again, switch the power off and replace the fuse with
another of the same rating.
• If it blows again, then contact your nearest ARX service centre or the
dealer where you bought the amplifier.
If a DC fuse blows:
• Get a qualified service person to inspect inside the amplifier. Please
don’t do it yourself! There are
very
dangerous voltages inside amplifi-
ers, even when they have been turned off!
