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POWER PROCESSING
AMPLIFIERS
Protect ACL ACL
On
Off Ch A Ch B
Remote Active Signal Signal CKS 800
Professional Power Amplifier
On Protect ACL ACL
Ch B
Off Ch A
Remote
Active Signal Signal CKV 80 0
Professional Power Amplifier
On Protect ACL ACL
Off Ch A Ch B
Remote
Active Signal Signal CKX 500
Professional Power Amplifier
OWNER’S MANUAL
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Important Precautions 10. Power down & disconnect units from 20. Non-use periods. The power cord of This symbol is used to alert the oper- ator to follow important operating mains voltage before making connec- equipment should be unplugged from procedures and precautions detailed tions. the outlet when left unused for a long in documentation. period of time. 11. Never hold a power switch in the “ON” position if it won’t stay there 21. Service Information Equipment This symbol is used to warn ope
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Power Amplifier Owner’s Manual Table of Contents. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Quick Set-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installation and Mounting . . . . . . . . . . . . . . . . . . . . . . . . 3 Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Side Panels. . . . . . . . . . . . . .
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Introduction. Congratulations on your purchase of a Crest Audio CK family of By combining legendary Crest performance with three unique plug-in Power Processing amplifiers. Please read this manual carefully (espe- module bays located on the rear panel, these amplifiers can become cially the the “Important Precautions” section located inside the front very sophisticated audio processors. The CK family is everything that cover) as it contains information vital to the safe operation of the you expe
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Unpacking. Front Panel. Upon unpacking, inspect the amplifier. If you find any damage, noti- 1. Rack Mounting Ears. fy your supplier immediately. Only the consignee may institute a Two to four mounting holes are provided on each front mounting claim with the carrier for damage incurred during shipping. Be sure ear. to save the carton and all packing materials. Should you ever need to 2. Three-position AC Power Switch. ship the unit back to Crest Audio, one of its offices, service centers, A thre
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A barrier strip is provided for connection of loudspeakers with bare Rear Panel. wire or spade lug connectors. A signal ground lift jumper permits the Module Bays & Modules. audio ground to be lifted from the chassis ground. For more informa- The rear panel of CK Power Processing amplifiers provides three tion see the sections on Signal Ground Lift Jumper, Module bays (Input, Network and Output/Power) configured to accept inter- Removal, and Sequential Turn-On/Turn-Off. changeable plug-in module
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PowerSave. Parallel Mode Diagram All CK Power Processing amplifiers come standard with PowerSave - + circuitry. This effectively reduces current draw and thermal emis- CLASS 2 WIRING sions to a minimum when the amplifier is at idle. PowerSave oper- MAY BE USED Output 5 Level 4 6 – A 3 7 +8 to 18VDC 2 ates by cutting off the bias current to the output stage after signal 20 mA 8 A 1 9 LISTED 8B42 COMMERCIAL + 0 10 POWER AMPLIFIER In Level 4 5 absence is sensed at the input. Once signal is
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all input NC modules), labeled “W1 W2 W3”, are used to set the Input Bay. overall gain of the amplifier. The 3 positions allow the amplifier to Input Module Connections and Controls. be set for constant gain of X20 (26 dB), X40 (32 dB), OR constant Input barrier strips have a 0.325" (8.3mm) center and 0.270" sensitivity for full output (.775V) at 0 dBu input. The standard facto- (6.9mm) lug space. For connecting to the input barrier strips, a wire ry setting is for X40 (32dB). (Refer to the spec
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9 9 A A B B C C D D E E F F Network Bay. Network Module Controls/Connections. CK Power Processing amplifiers come standard with a blanking panel fixed over the Network bay. When a Network module is installed in this bay, network connection is made via a pair of three- pin connectors. They are wired in parallel, and form a loop-through connection. (Mates for these connectors are shipped with the If Load Monitoring is Network module.) Network bus addressing is accomplished through employed, an add
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9 9 9 9 A A A A B B B B C C C C D D D D E E E E F F F F Input Module Replacement Diagram - NC-IPN. IMPORTANT: Designed & manufactured in the USA by: Crest Audio Inc. THE POWER/OUTPUT 100 Eisenhower Dr. WIRING E USED Paramus, New Jersey 07652 USA ut Model Output Power Model Output Power Name @70.7V Name @8W /Ch. CKV 100 50W CKS 100 50W CKS 200 100W MODULE IS NOT REMOVABLE. DO NOT CKV 200 100W CKS 400 200W CKV 400 200W CKS 800 400W CKV 800 400W CKS 800-2 400W CKV 1600 800W CKS 1200-2 600W CKV 24
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® TourClass Protection Features. Every model in the CK Power Processing incorporates TourClass protection features. Derived from Crest’s extensive experience with the world’s largest sound rental companies, the TourClass group of circuits sets new standards in load and amplifier protection. ACL (Active Clip Limiting). At the amplifier’s full power, or clipping point, ACL will be activat- ed. This is indicated by illumination of the Clip/ACL LED. The channel gain will automatically be reduced, gu
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Sequential Turn-On/Turn-Off. CK Power Processing amplifiers come standard with the CC-STL Sequential Turn-On/Turn-Off (STO) Output/Power module installed. If the amplifier front power switch is set to “remote” and a voltage of between +8 to +18 VDC is applied across the “Com” and “+8 to +18V” termi- nals, a closure between the “In” and “Com” terminals will turn the amplifier on. Additional amplifiers are added to the chain by looping from the "Out" terminal of one amplifier into the "In" termina
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Appendices
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Appendix A - CKS Series Specifications. CKS100 CKS200 CKS400 CKS800 CKS800-2 CKS1200-2 CKS1600-2 8Ω Stereo Power, 20Hz-20kHz, 0.1% THD+N 50 Watts 100 Watts 200 Watts 400 Watts 400 Watts 600 Watts 700 Watts 8Ω Stereo Power, 1kHz, 0.01% THD+N 60 Watts 120 Watts 255 Watts 440 Watts 420 Watts* 620 Watts* 715 Watts* 4Ω Stereo Power, 20Hz-20kHz, 0.1% THD+N 75 Watts 150 Watts 300 Watts 600 Watts 600 Watts 900 Watts 1100 Watts 4Ω Stereo Power, 1kHz, 0.01% THD+N 90 Watts 175 Watts 320 Watts 670 Watts 670
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Appendix B - CKV Series Specifications. CKV100 CKV200 CKV400 CKV800 CKV1600 CKV2400 Output Power, 70.7 Volt 50 Watts 100 Watts 200 Watts 400 Watts 800 Watts 1200 Watts Max RMS Output Voltage (each channel) 92V Peak Output Voltage (each channel) 130V Frequency Response (+0 / -0.3dB, 1W/70.7V) 10Hz –20kHz, -3dB @ 148kHz Power Bandwidth (full power, 1% THD+N) 10Hz –20kHz, +0/-0.2dB ® TourClass Protection ACL, IGM, AutoRamp, short circuit, DC voltage, turn-on/off transient, current inrush, and sub/u
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Appendix C - CKX Series Specifications. CKX150 CKX300 CKX500 CKX800 Output Power, 100 volt (50 or 70.7 volt option) 40Hz–20kHz, 0.1% THD+N 75 Watts 150 Watts 250 Watts 400 Watts Max RMS Output Voltage (each channel) 105V Peak Output Voltage (each channel) 150V Frequency Response (1W/100V) 38Hz–38kHz, +0/-3dB Power Bandwidth (rated power, 1% THD+N) 40Hz–16kHz, +0/-1dB ® TourClass Protection ACL, IGM, AutoRamp, short circuit, DC voltage, turn-on/off transient, current inrush, and sub/ultrasonic i
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Appendix D - Wire Gauge Charts Stranded Cable Lgth. Wire Gauge (AWG) Power Loss Power Loss Power Loss (ft.) (8 ohm load) (4 ohm load) (2 ohm load) 5 18 0.81% 1.61% 3.2% 16 0.51 1.02 2.0 14 0.32 0.64 1.28 12 0.20 0.40 0.80 10 0.128 0.25 0.51 10 18 1.61% 3.2% 6.2% 16 1.02 2.0 4.0 14 0.64 1.28 2.5 12 0.40 0.80 1.60 10 0.25 0.51 1.01 40 18 6.2% 11.9% 22% 16 4.0 7.7 14.6 14 2.5 5.0 9.6 12 1.60 3.2 6.2 10 1.01 2.0 4.0 8 0.60 1.20 2.4 18 11.9% 22% 37% 80 16 7.7 14.6 26 14 5.0 9.6 17.8 12 3.2 6.2 11.8 1
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Appendix E - Distributed / Constant Voltage Systems. A distributed or constant voltage system, as shown in the figure below, uses Z = 5000/ P loudspeaker step-down transformers for each speaker. The transformers are For example, if the total power demanded by the speakers is 200 watts, then: designed to deliver a specific power level into a specific load impedance 2 V /P = 25 when a specific voltage (the example here uses 70.7 volts) appears at the pri- mary. A speaker transformer usually has t
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Crest Audio CK Power Processing Amplifiers
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Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652 USA TEL: 201.909.8700 FAX: 201.909.8744 http://www.crestaudio.com Printed in USA v. 1.9 11/26/97 © 1997 Crest Audio, Inc. Power is serious business. *C1000020*
