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owner’s manual
8002 power amplifier
Professional Power Amplifier 8002
ACL
Signal
Status
-6 -6
-10 -3 -10 -3
-15 -15
-1 -1
-30 -30
-80 ØdB -80 ØdB
Ch A Ch B
Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
TEL: 201.909.8700 FAX: 201.909.8744
v. 1.0 4/29/98
*A4400076*
http://www.crestaudio.com
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important precautions Service Information Save the carton and packing materials! Do not run the output of any ampli- 1 Á Should you ever need to ship the unit, fier channel back into another Do not remove the cover! use only the original factory packing. channel’s input. Removing the cover will expose you to potentially dangerous voltages.There are For replacement packaging,call Crest Audio’s Do not parallel- or series-connect no user serviceable parts inside. Customer Service Department direct
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table of contents p.2 how to use this manual 1 p.3 introduction p.5 installation 2 unpacking mounting cooling and ventilation powering maintenance p.11 features overview 3 front panel rear panel p.17 operation modes 4 stereo contents parallel bridged p.21 connections 5 input output p.27 safety 6 tourclass protection precautions user responsibility p.33 service and support 7 support contact us registration p.36 specifications a appendixes p.37 block diagram b p.38 wire gauge c
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1 how to use this manual Pro II owner’s manual conventions terms official Crest Audio features and each indicator or control on the amplifier will appear as: terms actions specific actions or selections the user can execute will appear as: actions tasks are broken down into steps 1 2 3 warnings Procedures not to attempt. Issues or hazards to keep in mind when operating the equipment. indicators What to look for on ¨ the equipment display. Alerts, indicators, or prompts that may appear. tips
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1 introduction welcome Congratulations on your purchase of a new Pro II Series professional power amplifier, and thank you for your confidence in Crest Audio prod- ucts.You are among the growing number of audio professionals who have made Crest Audio one of the world’s leading suppliers of professional and commercial/industrial audio systems. For your safety, please read the Important Precautions section before installing and operating the amplifier.The Crest Audio Pro II Series is based on the
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p.4
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installation 2 / what to do with the shipping carton unpacking / proper rack-mounting technique / mounting keeping the amplifier cooled / grounding the amplifier cooling and / required AC line voltages ventilation / routine maintenance practices powering maintenance p.5
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installation 2 Pro II owner’s manual unpacking Please inspect the amplifier carefully immediately after unpacking. If you find any damage, notify your supplier/dealer immediately. Only the shipper may file a damage claim with the carrier for damage incurred during shipping. Be sure to save the carton and all packing materials for the carrier’s inspection. If the packing materials are in good condition, please save them. If you ever need to ship the unit back to Crest Audio or an authorized ser-
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installation 2 mounting All Pro II Series amplifiers mount in standard 19-inch racks.Four front-panel mounting holes are provided on each amplifier.Rear mounting ears give addi- tional support,and use of rear supports is highly recommended in all mobile and touring sound systems.Handles are fitted standard. 8002 shown Professional Power Amplifier 8002 ACL front Signal height Status 5.25"/ - - 133mm 6 6 -10 - -10 - 3 3 -15 -15 -1 -1 -30 -30 - - 80 ØdB 80 ØdB Ch A Ch B front width 19"/483mm 8002 s
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installation 2 Pro II owner’s manual cooling and ventilation Pro II Series amplifiers use a twin-tunnel forced-air cooling system to main- tain a low, even operating temperature. To ensure optimum cooling of the amplifier, Drawn in by dual 105 CFM (cubic feet-per-minute) DC fans on the rear panel, periodically clean its fan filters. These are removable air flows through the cooling fins of the channel heat-sinks,dissipating power without tools. transistor heat—then exhausts through the front
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installation 2 powering Unless otherwise specified when ordered, Pro II amplifiers shipped to cus- tomers are configured as follows: @ North America 90–255 VAC 50–60Hz Always turn off and dis- connect the amplifier from @ Europe 180–255 VAC 50–60Hz mains voltage before mak- ing audio connections. @ Asia 180–255 VAC 50–60Hz As an extra precaution, have the attenuators turned down @ Australasia 180–255 VAC 50–60Hz during power-up. @ South America 90–255 VAC 50–60Hz @ Japan 90–255 VAC 50–60Hz main
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features overview 3 / location of connectors and controls front panel / legend of panel symbols rear panel p.11
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features overview 3 Pro II owner’s manual 8002 shown 1 2 3 4 5 6 7 8 Professional Power Amplifier 8002 ACL Signal Status -6 -6 - - 10 -3 10 -3 -15 -15 -1 -1 -30 -30 - - 80 ØdB 80 ØdB Ch A Ch B p.12
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features overview 3 front panel Rack Mounting Ears 1 Two front-panel mounting holes are provided on each mounting ear. Rack Handles 2 Fan Outlet Grills 3 Pro II Series amplifiers are cooled by two, rear-mounted fans.Cool air flows over the heat sinks and exhausts through the front grills. Make sure these outlets remain clear to allow unrestricted airflow. Signal LED 4 A variable-intensity LED that illuminates to indicate that a signal (above a minimum threshold) is present at the amplifier input
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features overview 3 Pro II owner’s manual 8002 shown 1 2 3 4 5 6 7 8 rear panel Output Connectors rear panel legend 1 input connection Pro II Series power amplifiers are supplied with both high-current five- 1 2+ XLR connector polarity 3- way binding posts and Speakons installed. Binding posts: one pair per TRS connector polarity channel. Speakons: one connector per channel, plus a third connector configured for bridged-mono operation. A bridged mono mode AB A Connection to the binding post
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features overview 3 rear panel Female Balanced XLR Input Connectors 3 Male Balanced XLR Input Connectors 4 These connectors accept input signals on balanced male and female XLR input plugs. Connectors for each channel are in parallel; any unused XLR connectors may be used for daisy-chaining input connec- tions to other amplifiers. Never connect a hot (red) In Parallel and Bridge Mono mode a signal applied to channel A’s input output to ground or to another hot (red) output! connectors will appe
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operation modes 4 / choosing the appropriate mode stereo / switching between operation modes / parallel keeping the amplifier cooled / special considerations when using bridged mode bridged p.17
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operation modes 4 Pro II owner’s manual mode selection The three-position,recessed Mode Select switch (located on the rear panel) configures the amplifier for Stereo, Parallel or Bridged mode. Amplifiers are factory-configured for Stereo mode. stereo In Stereo mode,both channels operate independently,with their input atten- uators controlling their respective levels.Signal at Channel A’s input produces output at Channel A’s output,while signal at Channel B’s input produces out- put at Channel
