Crest Audio 8002 Owner'S Manual Download Page 33 | Manualshive

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p. 31

safety

6

DC Voltage

If an amplifier channel detects

DC

voltage at its output terminals, the out-

put relay will immediately open to prevent loudspeaker damage.The

Status

LEDs

will turn red.

Subsonic Frequencies

Built-in high pass filtering provides subsonic frequency protection for each
channel. In addition, a relay will open if excessive subsonic energy appears
at the output.

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Summary of Contents for 8002

Page 1: ...owner s manual Ch A Ch B 80 30 15 10 6 3 1 ØdB 80 30 15 10 6 3 1 ØdB 8002 Professional Power Amplifier Status Signal ACL 8002 power amplifier ...

Page 2: ......

Page 3: ...ing maintenance features overview p 11 front panel rear panel operation modes p 17 stereo parallel bridged connections p 21 input output safety p 27 tourclass protection precautions user responsibility service and support p 33 support contact us registration specifications p 36 block diagram p 37 wire gauge charts p 38 a b c contents appendixes ...

Page 4: ...ks are broken down into steps 1 2 3 warnings indicators tips see see refers to other sections of the manual containing supplementary information on the current topic or a related issue note note supplimentary feature information Prefered methods Helpful hints Feature insights Procedures not to attempt Issues or hazards to keep in mind when operating the equipment a What to look for on the equipmen...

Page 5: ...stAudio s unique implementation of Power Factor Correction which allows current to be drawn throughout the entire cycle of the AC line frequency providing maximum output power while drawing significantly smaller peak currents from the AC line Compared with an amplifier using a conventional power supply PowerLok requires less peak power to produce identical output power and because PowerLok s curre...

Page 6: ...p 4 ...

Page 7: ... mounting cooling and ventilation powering maintenance what to do with the shipping carton proper rack mounting technique keeping the amplifier cooled grounding the amplifier required AC line voltages routine maintenance practices ...

Page 8: ... 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 CrestAudio or an authorized ser vice center you should use only the original factory packing For replacement pack aging call Crest Audio s Customer Service Department ...

Page 9: ...onal support and use of rear supports is highly recommended in all mobile and touring sound systems Handles are fitted standard Ch A Ch B 80 30 15 10 6 3 1 ØdB 80 30 15 10 6 3 1 ØdB 8002 Professional Power Amplifier Status Signal ACL front height 5 25 133mm front width 19 483mm 8002 shown 8002 shown 35mm rear width 17 432mm 19 483mm to rack ears depth 18 457mm rear height 5 25 133mm ...

Page 10: ...main tain a low even operating temperature Drawn in by dual 105 CFM cubic feet per minute DC fans on the rear panel air flows through the cooling fins of the channel heat sinks dissipating power transistor heat then exhausts through the front panel slots Heat sink temperature sensing circuits control the intelligent variable speed fans Fan speed increases only as required by heat sink temperatures...

Page 11: ...sure proper ventilation through the unit If the amplifier is used in an extremely dusty or smoky environment the fil ter should be cleaned or changed frequently and the unit should be period ically blown free using compressed air of any foreign matter that may have penetrated the filter Users will not need to make any internal adjustments to the amplifier dur ing its lifetime There are no user ser...

Page 12: ...p 10 ...

Page 13: ...p 11 features overview 3 front panel rear panel location of connectors and controls legend of panel symbols ...

Page 14: ...Pro II owner s manual p 12 features overview 3 Ch A Ch B 80 30 15 10 6 3 1 ØdB 80 30 15 10 6 3 1 ØdB 8002 Professional Power Amplifier Status Signal ACL 8002 shown 1 2 3 8 4 7 5 6 ...

Page 15: ...fier chan nels In Bridged Mono mode the channel A attenuator controls signal level 6 Status LED A bi color LED When green it indicates that AC power is connected and the amplifier is turned on When red the channel is in Protect mode speakers disconnected by output relay 7ACL LED Illuminates at the clipping threshold Continuous illumination also indi cates that ACL ACTIVE CLIP LIMITING protection c...

Page 16: ...o or Parallel mode or to the Bridged mode connector s for Bridged Mono mode see operation modes 2 Mode Selection Switch This recessed three position switch configures the amplifier for Stereo Parallel or Bridged Mono mode operation Amplifiers are factory config ured for Stereo mode see operation modes Do not adjust the mode selection switch while the amplifier is turned on a rear panel legend 1 3 ...

Page 17: ...tandard with the XLR configured as Pin 2 hot Use the XLR polarity switch to change this setting to Pin 3 hot if desired 8 Signal Ground Lift Switch The recessed signal ground lift switch electrically connects signal ground to the chassis AC ground This switch is factory set to the ground position bottom The top position lifts the amplifier s signal ground In a properly designed system for safety p...

Page 18: ...p 16 ...

Page 19: ...p 17 operation modes 4 stereo parallel bridged choosing the appropriate mode switching between operation modes keeping the amplifier cooled special considerations when using bridged mode ...

Page 20: ...ral amplifier One channel pushes and the other pulls equally doubling the power over that of either channel alone Signal is applied to the Channel A input only Channel A s attenuator is used to con trol signal level Either male or female XLR input may be used The channel B input connectors male or female XLR may be used to daisy chain the channel A signal when in parallel or bridged mono mode Use ...

Page 21: ...p 19 operation modes 4 ...

Page 22: ...p 20 ...

Page 23: ...p 21 connections 5 input output proper wiring schemes for connectors XLR speakon binding post correct signal paths stereo parallel and bridged ...

Page 24: ...urrent five way binding posts or speakon connectors or both depending on preference and model see operation modes Some other Crest Audio amplifiers are configured with pin 3 hot a Very high current is available at the outputs Please connect your output cable to the and terminals of each section precisely as shown a The unused connector can be used to jumper the audio input to another amplifier inp...

Page 25: ...no mode five way binding post connectors Unused XLR connectors can be utilized to daisy chain a signal source to additional amplifiers Unused XLR connectors can be utilized to daisy chain a signal source to additional amplifiers Unused XLR connectors can be utilized to daisy chain a signal source to additional amplifiers ...

Page 26: ...idged mono mode speakon output connectors Unused XLR connectors can be utilized to daisy chain a signal source to additional amplifiers Unused XLR connectors can be utilized to daisy chain a signal source to additional amplifiers Unused XLR connectors can be utilized to daisy chain a signal source to additional amplifiers ...

Page 27: ...p 25 connections 5 ...

Page 28: ...p 26 ...

Page 29: ...p 27 safety 6 user responsibility speaker protection TourClass the owner s role in amplifier safety description ofTourClass protection features protecting your speakers ...

Page 30: ...e the inside front cover and make sure that the amplifier is installed wired and operated properly as instructed in this manual Many loudspeakers can be easily damaged or destroyed by overpow ering especially with the high power available from a bridged amplifier Always be aware of the speaker s continuous and peak power capabil ities Crest Audio is not responsible for damage to loudspeakers for a...

Page 31: ... adjusted external limiter or a compres sor with a ratio of 10 1 or higher to control power output Use one com pressor limiter for each frequency band in systems with active electronic crossovers The ACL clip limiting circuit will automatically limit the duration of squared off continuous waveforms applied to the speakers The amplifier will however allow normal musical transient bursts to pass Of ...

Page 32: ...nel gain to a safe level Like ACL the IGM circuit is inaudible in normal use In addition if extreme and sustained low impedance is encountered the amplifier s output relay will open AutoRamp Auto Ramp operates every time the amplifier is turned on or is reactivated after a protect condition is corrected This exclusive Crest Audio feature gradually increases gain to the attenuator setting avoiding ...

Page 33: ...als the out put relay will immediately open to prevent loudspeaker damage The Status LEDs will turn red Subsonic Frequencies Built in high pass filtering provides subsonic frequency protection for each channel In addition a relay will open if excessive subsonic energy appears at the output ...

Page 34: ...p 32 ...

Page 35: ...p 33 service and support 7 when to get support ways to contact CrestAudio support contact us ...

Page 36: ...vice phone 201 909 8700 USA fax 201 909 8744 USA email customerserve crestaudio com technical support phone 201 909 8700 USA fax 201 587 0550 USA email techserve crestaudio com website www crestaudio com mail CrestAudio Inc 100 Eisenhower Drive Paramus NJ 07652 USA Because of the complexity of the design and the risk of electrical shock all repairs should be attempted only by qualified technical p...

Page 37: ...p 35 service and support 7 ...

Page 38: ...reaker rear panel signal ground lift mode select input sensitivity pin 2 3 acl signal status bi color active protect acl igm autoramp short circuit dc voltage turn on off transient current in rush sub ultrasonic input aluminum chassis double thickness in rack ear areas 5 25 x 19 x 18 133 x 483 x 457mm height x width x depth gross 47lbs 21 7kg net 42lbs 19 1kg five years USA Canada United Kingdom a...

Page 39: ...p 37 block diagram b ...

Page 40: ...0 75 1 5 2 5 4 6 4 3 2 9 1 45 0 87 0 55 0 37 8 2 5 6 2 9 1 74 1 09 0 73 15 5 10 8 5 6 3 4 2 2 1 45 0 5mm2 0 75 1 5 2 5 4 6 8 24 5 6 2 9 1 74 1 09 0 73 5 5 10 8 5 6 2 9 1 74 1 09 28 19 9 10 8 6 7 4 3 2 9 0 75mm2 1 5 2 5 4 6 10 15 5 8 2 5 1 3 2 2 2 1 31 0 73 15 5 9 8 6 3 4 3 2 6 45 28 18 2 12 0 8 2 5 1 2meters 5 meters 10meters 30meters wire gauge power loss 8Ω load 4Ω load 2Ω load ...

Page 41: ...14 12 10 1 61 1 02 0 64 0 40 0 25 3 2 2 0 1 28 0 80 0 51 6 2 4 0 2 5 1 60 1 01 18AWG 16 14 12 10 8 6 2 4 0 2 5 1 60 1 01 0 60 11 9 7 7 5 0 3 2 2 0 1 20 22 14 6 9 6 6 2 4 0 2 4 18AWG 16 14 12 10 8 11 9 7 7 5 0 3 2 2 0 1 20 22 14 6 9 6 6 2 4 0 2 4 37 26 17 8 11 8 7 7 4 7 5feet 10feet 40feet 80feet wire gauge power loss 8Ω load 4Ω load 2Ω load ...

Page 42: ......

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