ARX Cinema Pro CP550 User manual

Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX® Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX®8 1
Cinema Pro
CP550 and 850
POWER
AMPLIFIERS
OWNER’S
MANUAL
INTERNATIONAL LIMITED WARRANTY
ARXSystems(ARX)warrantstothefirstpurchaserofanyARXequipmentthatitisfree
fromdefects inmaterials andworkmanship undernormal useand service.ARX’s sole
obligation under this warranty shall be to provide, without charge, parts and labour
necessarytoremedydefects,ifany,whichappearwithintwelve(12)monthsfromdateof
purchase,andforafurthertwelve(12)monthssupplypartsonly.
Thisis ouronly warranty.Itdoesnotcoverfinishorappearanceitems,burnedvoice
coils,oriftheequipmenthasbeen,in ARX’ssolejudgement:
•Subjectedtomisuse,abuse,negligenceoraccident;
•Repaired,workedon,oralteredbypersonsnotauthorizedbyARX;
•Connected, installed, adjusted or used for a purpose other than that for which it was
designed.ThisincludesrunningaspeakersystemwiththeISCleadsdisconnected,or
withanon-ARXcrossover,orwiththewrongprocessor.
Thiswarrantygives youandusspecificlegalrightsandyoumayalsohaveotherrights
whichmayapply.
Warranty Service Procedure
Should it become necessary to have your equipment serviced under the
terms of the warranty, please follow these steps:
1. Call your ARX distributor for a Return Authorization (RA) number;
2. Carefully repack the unit, in its original packaging where possible,
including a note with a description of the problem, and a copy of
the receipt showing date of purchase. Attach these to the actual
unit itself. Don’t forget to write your name and address clearly, and
include a phone number where you can be contacted during
normal business hours. Make it easy for our service technicians to
contact you if they have a question. Also, use plenty of packing
material - better to be safe than sorry.
3. Send the unit freight prepaid to ARX Systems, at the address given
you with your RA number. We will pay the return freight when the
serviced unit is returned to you.
4. We strongly recommend you insure the package. We can’t fix it if it
gets lost! Send it by UPS, Fedex, or any similar service that can track
the package. Parcel Post is not recommended
If Warranty Registration Card is missing, please write to ARX in the country of
purchase, stating model and where purchased, or to ARX, PO Box 15, Moorabbin,
Victoria 3189, Australia.
Or you can Email us at: [email protected]
ARXARX
ARXARX
ARX Systems Pty Ltd, PO Box 15,
Moorabbin, Victoria 3189, Australia
PhonePhone
PhonePhone
Phone: [phone] FaxFax
FaxFax
Fax: [phone]
International FaxInternational Fax
International FaxInternational Fax
International Fax: [phone]
On the WebOn the Web
On the WebOn the Web
On the Web: www.arx.com.au
EmailEmail
EmailEmail
Email: [email protected]

Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX® Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX®
27
PowerSupply
ToroidalpowertransformerandHeavydutydiodebridge,toretaindynamicrangeundereven
theheaviestloadconditions.
InputImpedance 20KohmsBalanced
InputSensitivity .775 Vrms (0 dB)
Input CMRR @1KHz >70dB
lnputConnector 1 x XLR ( Female) Pin 3-, Pin 2 +, Pin 1 Electronic Ground
Crossover Filter Type LinkwitzRiley24dBperOctave4thOrder
HighPassFilter 18dBperOctave3rdOrder30Hzuseradjustable
ThieleSmall LF EQ 0dBfactorysetuseradjustable+6dB30Hz-80Hz
HF EQ Internallyswitchable:Flator+6dB10KHz
Output Power (RMS)
CP550 Both channels driven: 200 watts RMS into 8 ohms, 270
wattsRMSinto 4 ohms
CP850 Both channels driven: 300 watts RMS into 8 ohms, 400
wattsRMSinto 4 ohms
Distortion THD @ 100Hz, 8 ohms 0.03%
THD @ 1KHz, 8 ohms 0.05%
SlewRate 35VuS
DampingFactor 200:1
ProtectionFeatures •Outputswitchedthermalsensing
•RelayswitchedDCsensing
•Input/Outputmute at turnonand off
•Variablespeedfanassistedcooling
OutputConnectors NeutrikSpeakons777
Metering LEDstatus indicatorsfor Clipand Protection
Cooling Front to back with ‘UltraFin’ heatsink and 2 x variable speed
thermocontrolledDCfans
Construction All steel chassis and front panel, with Lexan front and rear
print. Rear rack mount ears, front panel power switch, rear
panellowandhighlevelcontrols
ACPower Supplied‘zone-specific’:100/120/220/240VAC
Weight CP550 10 Kg (22 lbs)
CP850 12 Kg (26 lbs)
Size Standard2 rackunits highand19"(482mm)wide
Depth 16"(405mm)Add25mmtodepthbehindfrontpaneltoallowforrear
rackmountearsandhandles;add25mmtodepthbeforefrontpanel
toallowforhandlesandcontrols
This symbol indicates that a Slow Blow fuse is used in this equip-
ment. Replace with same type and value only
This symbol is intended to alert you to the presence of uninsulated
dangerous voltage within the product's enclosure that may be of
sufficient magnitude to constitute a risk of electric shock.
This symbol is intended to alert you to the presence of important
operating instructions contained in this owner's manual
WARNING SYMBOLS USED ON THIS EQUIPMENT
IMPORTANT - This amplifier is designed
to be connected ONLY to the AC voltage
ticked below
100 V AC, 50 - 60 Hz
120 V AC, 50 - 60 Hz
220-240 V AC, 50 - 60 Hz
240 V AC, 50 - 60 Hz
!
It is essential that you check that
this voltage is correct for your
area before connecting it to AC
power. Do not plug power cable
into AC power until voltage has
been checked. If incorrect, contact
your ARX distributor.
Your warranty does not cover
connecting the amplifier to the
wrong voltage AC power!
FUSE
These amplifiers have a removable AC power
lead that connects to an IEC connector (See
Picture at Left) with built in fuse. Replace fuse
with correct value as marked on the rear of the
amplifier
Complies with 89/336/EEC EMC Directive,
amended by 92/31/EEC and 93/68/EEC and
meetsthefollowingstandards:EN55013:1990,
Sections3.2and3.5EN55020:1988,Sections
4.3,5.4, 6.2,7.0,8.0.
ComplieswithAustralianStandardAS/N251053

Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX® Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX®45
Application Notes
Things to check before you plug the amplifier in
Main AC power - check that the voltage marked on your amplifier is the
same as the voltage at the power point. It is a good idea to check this
before plugging the amplifier into the power point. Be especially careful
of plugging into unchecked ‘piggyback’ plugs, power distribution boxes
or extension cables.
Your warranty does not cover damage caused by incorrect wiring.
Make sure the amplifier is connected to the same AC power supply and
Earth/Ground as the rest of the system, otherwise you may set up a
Ground loop hum.
The CP550 weighs approximately 11 kilos/24 lbs, and the CP850 12kilos/
26 lbs. We strongly recommend that you use the rear mounting slots as
well as those on the front panel.
All these amplifiers have cooling fans that force air around and through
the heatsinks. There are 2 fans on each model in the Cinema Pro series
Air flow diagram
It is extremely important that you ensure that there is unrestricted air access
to these fans, and also unrestricted air exit path. Clean the fan filters regular-
ly or at the first sign of becoming clogged.
Front Panel
• EasyGrip Handles
• Protection and Clip LEDs
• 4 mm steel front panel
Rear Panel
• Balanced Jack Input
• Low frequency and High frequency level controls
• Low and High Speakon Outputs, wired to Pin # 1 +
and Pin # 1 –
• AC power connector with integral fuse.
• Heavy Duty Rear rack ears for four point racking
All Cinema Pro amplifiers have sufficient fan cooling capacity built in,
and need no extra external fan cooling to operate normally. Their com-
pact ‘UltraFin’ heatsink provides massive surface areas for rapid cooling
and stable temperatures.
BUT...
When racking up these amplifiers, a you MUST allow space for the air to
exit from the rear of the amplifier. Remember that Power = Heat, and
Maximum air flow = successful heat management.
COLD AIR IN
FROM FRONT
WARM AIR OUT
AT REAR
• Non-scratch Lexan printed panel
• Illuminated power switch
• Fan filters
COLD AIR IN
FROM FRONT
WARM AIR OUT
AT REAR

Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX® Cinema Pro Amplifier Owner's Manual world v 2 ©2000 ARX®63
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 UltraFinTM 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 separate + 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!