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Manual Crest Audio CA12

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  • Crest Audio CA12 - page 1

    O WNER’ S MANU AL PROFESSIONAL PO WER AMPLIFIERS Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier ...

  • Crest Audio CA12 - page 2

    1. Save the carton and packing material even if the equipment has arrived in good condition. Should you ever need to ship the unit, use only the original factory packing. 2. Read all documentation before oper- ating your equipment. Retain all doc- umentation for future reference. 3. Follow all instructions printed on unit chassis for proper operati ...

  • Crest Audio CA12 - page 3

    Crest Audio CA Series Power Amplifiers Page 3 Models CA2, CA4, CA6, CA9, CA12, CA18 Introduction Unpacking Installation and Mounting Front Panel Rear Panel Internal Configuration and Control Operation Connecting Po wer / Circuit Size Requirements Cooling Requirements Connecting Inputs Connecting Outputs Mode Selection Stereo /Parallel/Bridged Mono ...

  • Crest Audio CA12 - page 4

    Page 4 Crest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 Professional Power Amplifier Front height 5.25" 133mm Front width 19" / 483mm CA12, CA18 Front Vie w Professional Power Amplifier Front height 3.5" 89mm CA2-9 Front Vie w Rear & Side Views Front width 19" / 483mm *Note: see Appendix E f or de ...

  • Crest Audio CA12 - page 5

    Intr oduction Congratulations on your purchase of a ne w CA Series professional po wer amplifier , and thank you for your confidence in Crest Audio products. Y ou are among the gro wing number of audio professionals who hav e made Crest Audio one of the world’ s leading suppliers of professional and commercial/industrial audio sys- tems. For your ...

  • Crest Audio CA12 - page 6

    Fr ont P anel 1. Rack Mounting Ear s. T wo front panel mounting holes are provided on each mounting ear . 2. Optional Rack Handles. A v ailable from your authorized Crest Audio supplier . 3. Fan Outlet Grills. CA Series amplifiers are cooled by tw o, rear -mounted fans. Cool air flo ws o ver the heat sinks and e xhausts through the front grills. Ma ...

  • Crest Audio CA12 - page 7

    Rear P anel See Appendix E for information specific to model CA18. 10. Output Connectors (T wo versions, market dependent) CA Series amplif iers are supplied with either 5-way Binding Posts or Speakon connectors. Connection to the binding posts can be made with bare wire, banana plugs, or spade lug terminations. Make connections to both the Channel ...

  • Crest Audio CA12 - page 8

    13-14. Balanced 1/4" (TRS) & XLR Input Connectors. These connectors accept input signals on balanced TRS and XLR input plugs. See the figure at the left for information on polarity . Connectors for each chan- nel are in parallel; the unused connectors may be used for “loop through” con- nection to other amplifiers. NO TE: Unbalanced ? ...

  • Crest Audio CA12 - page 9

    Operation Connecting P o wer / Cir cuit Size Requirements. CA Series amplifier po wer requirements are rated at: a) “idle” b) 1/8th po wer (“typical” music conditions) c) 1/3rd po wer (“continuous” music conditions) d.) maximum rated po wer (circuit breaker limited). The maximum po wer current draw rating is limited only by the front pa ...

  • Crest Audio CA12 - page 10

    Connecting Inputs. Use either the XLR or 1/4-inch input connectors on the rear to supply audio signals to your Crest Audio CA Series amplifier . Both connectors accept balanced and unbalanced audio connections. (The CA Series amplifiers are conf igured standard with “Pin 2 hot” on XLR inputs. Please note that some other Crest Audio amplifiers a ...

  • Crest Audio CA12 - page 11

    Mode Selection. The three-position, recessed Mode Select switch (located on the rear panel) configures the amplif ier for either Stereo, Parallel or Bridged Mono Mode. Amplif iers are factory-conf igured for Stereo Mode. Stereo Mode. In Stereo Mode, both channels operate independently , with their input attenuators controlling their respec- ti ve l ...

  • Crest Audio CA12 - page 12

    Page 12 Crest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 A A B AB A 1 3- 2+ + A A B B •• • • + + + A B B A A B + + B B or A A or B A A A B AB A 1 3- 2+ + A A B B •• • • + + + A B B A A B + + A A or A A A A B AB A 1 3- 2+ + A A B B •• • • + + + A B B A 643-106 A B A A A or + Bridged/Mono Stereo Mod ...

  • Crest Audio CA12 - page 13

    Crest Audio CA Series Power Amplifiers Page 13 Models CA2, CA4, CA6, CA9, CA12, CA18 A A B AB A 1 3- 2+ + • • • • B A NL4FC B A A B A A B B B A A or B or B A + - + - Speaker + to PIN 1 + Speaker - to PIN 1 - 2+ 1- 2- 1+ A A B AB A 1 3- 2+ + • • • • B A NL4FC B A A B A A B B A A or A A + - + - Speaker + to PIN 1 + Speaker - to PIN 1 ...

  • Crest Audio CA12 - page 14

    T ourClass ® Pr otection Every model in the CA Series incorporates T ourClass protection features. Deri ved from Crest Audio’ s extensi v e experience with the w orld’ s largest sound rental companies, the T ourClass group of circuits sets the industry standard for assured protection of internal amplifier circuits and all connected loads. A CL ...

  • Crest Audio CA12 - page 15

    User Precautions Speaker Protection All loudspeakers ha ve electrical, thermal, and physical limits which must be observ ed to pre v ent damage or failure. Cone or compression dri v ers can be damaged (sometimes to the point of failure) from excessi v e po wer , lo w frequencies applied to high frequenc y dri vers, se v erely clipped wa v eforms, a ...

  • Crest Audio CA12 - page 16

    Maintenance A CA Series amplifier requires no routine maintenance other than occasional cleaning or replacement of the fan intake f ilters on the rear of the amplif ier . (This operation does not require any tools). Filters must be kept clear and clean to ensure proper v entilation through the unit. If the amplif ier is used in an extremely dusty o ...

  • Crest Audio CA12 - page 17

    Appendices ...

  • Crest Audio CA12 - page 18

    Appendix A Crest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 Appendix A - Amplifier Specifications 1kHz, 0.01% THD+N 8 Ω Stereo Power 4 Ω Stereo Power 2 Ω Stereo Power 8 Ω Bridged Mono Power 4 Ω Bridged Mono Power 20Hz-20kHz, 0.1% THD+N 8 Ω Stereo Power 4 Ω Stereo Power 2 Ω Stereo Power 8 Ω Bridged Mono ...

  • Crest Audio CA12 - page 19

    Crest Audio CA Series Power Amplifiers Appendix B Models CA2, CA4, CA6, CA9, CA12, CA18 Appendix B - CA Bloc k Diagram BRIDGED - P ARALLEL - STEREO SWITCH R T 2 3 1 2 3 1 R T 2 / 3 PIN 2 / 3 + JUMPER (REAR P ANEL SWITCH ON CA18) + - INVERTED NON-INVERTED PREAMP PREAMP A TTENUA TOR A TTENUA TOR AMP FRONT END AMP FRONT END OUTPUT ST AGE OUTPUT ST AGE ...

  • Crest Audio CA12 - page 20

    Appendix C Crest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 Stranded Cable Lgth. (m) 2 5 10 30 Wire Gauge (mm 2 ) 0.3 0.5 0.75 1.5 2.5 4 0.5 0.75 1.5 2.5 4 6 0.5 0.75 1.5 2.5 4 6 0.75 1.5 2.5 4 6 10 Power Loss (8 ohm load) 2.9% 1.74 1.16 0.58 0.35 0.22 4.3% 2.9 1.45 0.87 0.55 0.37 8.24% 5.6 2.9 1.74 1.09 0.73 15.5% 8.2 5 ...

  • Crest Audio CA12 - page 21

    Crest Audio CA Series Power Amplifiers Appendix C Models CA2, CA4, CA6, CA9, CA12, CA18 Stranded Cable Lgth. (ft.) 5 10 40 80 Wire Gauge (AWG) 18 16 14 12 10 18 16 14 12 10 18 16 14 12 10 8 18 16 14 12 10 8 Power Loss (8 ohm load) 0.81% 0.51 0.32 0.20 0.128 1.61% 1.02 0.64 0.40 0.25 6.2% 4.0 2.5 1.60 1.01 0.60 11.9% 7.7 5.0 3.2 2.0 1.20 Power Loss ...

  • Crest Audio CA12 - page 22

    Appendix D Crest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 A B B A + + + A A B B B A A B XLR Pin + 2 3 GAIN Ø dBu 40x 20x + 1 3- 2+ A A B AB A Input Connection Section Output Connection Section XLR Connector Polarity Indicator TRS Connector Polarity Indicator Mode Selection Switch - Bridged Mono Position Mode Selection ...

  • Crest Audio CA12 - page 23

    Crest Audio CA Series Power Amplifiers Appendix E Models CA2, CA4, CA6, CA9, CA12, CA18 Appendix E CA18 P ower Amplifier - Special Functions XLR Pin + GAIN Ø dBu 40x 20x A B + AB A A A B A A B B A B B A + + + Designed & manufactured in the USA by: Crest Audio Inc. 100 Eisenhower Dr. Paramus, New Jersey 07652 USA 2 3 1 3 2 XLR Pin + GAIN Ø dBu ...

  • Crest Audio CA12 - page 24

    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 Choice of touring pr of essionals. *B5000013* v. 2.9 11/25/97 © 1997 Crest Audio, Inc. ...

Manufacturer Crest Audio Category Musical Instrument Amplifier

Documents that we receive from a manufacturer of a Crest Audio CA12 can be divided into several groups. They are, among others:
- Crest Audio technical drawings
- CA12 manuals
- Crest Audio product data sheets
- information booklets
- or energy labels Crest Audio CA12
All of them are important, but the most important information from the point of view of use of the device are in the user manual Crest Audio CA12.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Crest Audio CA12, service manual, brief instructions and user manuals Crest Audio CA12. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Crest Audio CA12.

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A complete manual for the device Crest Audio CA12, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Crest Audio CA12 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Crest Audio CA12.

A complete Crest Audio manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Crest Audio CA12 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Crest Audio CA12, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Crest Audio CA12, that we can find in the current document
3. Tips how to use the basic functions of the device Crest Audio CA12 - which should help us in our first steps of using Crest Audio CA12
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Crest Audio CA12
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Crest Audio CA12 in a specific country, if it was not possible to solve the problem on our own.

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