Crown CTs 1200 Operation Manual

Crown CTs 1200 Operation Manual

Cts 2-channel series
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Operation Manual

Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.
Trademark Notice: Com-Tech, BCA, Crown, Crown Audio, Amcron and Multi-Mode are registered trademarks of Crown International.
PIP and PIP2 are trademarks of Crown International. Other trademarks are the property of their respective owners.
CTs 2-Channel Series
Some models may be exported under the name Amcron.
®
©2004 by Crown Audio
, Inc. P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 574-294-8000
CTs 600
CTs 1200
CTs 2000
CTs 3000
®
134433-5
7/04

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Table of Contents
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Summary of Contents for Crown CTs 1200

  • Page 1: Operation Manual

    To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com. Trademark Notice: Com-Tech, BCA, Crown, Crown Audio, Amcron and Multi-Mode are registered trademarks of Crown International. PIP and PIP2 are trademarks of Crown International. Other trademarks are the property of their respective owners.
  • Page 2: Important Safety Instructions

    CTs 2-Channel Power Amplifiers Important Safety Instructions Read these instructions. TO PREVENT ELECTRIC SHOCK DO NOT REMOVE Keep these instructions. TOP OR BOTTOM COVERS. NO USER SERVICE- Heed all warnings. ABLE PARTS INSIDE. REFER SERVICING TO Follow all instructions. QUALIFIED SERVICE PERSONNEL. Do not use this apparatus near water.
  • Page 3: Declaration Of Conformity

    Equipment Type: Commercial Audio Power Amplifiers Family Name: CTs Model Names: CTs 3000, CTs 2000, CTs 1200, CTs 600 EMC Standards: EN 55103-1:1995 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions EN 55103-1:1995 Magnetic Field Emissions-Annex A @ 10 cm and 1 M EN 61000-3-2:1995+A14:2000 Limits for Harmonic Current Emissions (equipment input current ≤16A per phase)
  • Page 4: Table Of Contents

    CTs 2-Channel Power Amplifiers Table of Contents Important Safety Instructions ............2 5.1.3 Fault ................15 Declaration of Conformity .............. 3 5.1.4 High-Pass Filters ............15 5.1.5 Low-Pass Filters ............15 1 Welcome ............5 5.1.6 AC Under/Over Voltage Protection ......15 1.1 Features ................5 5.1.7 Circuit Breaker ............15 2 How to Use This Manual ........
  • Page 5: Welcome

    They must be 20 Hz–20 kHz 1500W 2-ohm Dual (per ch.) CTs 1200 only when necessary. treated with respect and correctly installed if Power 1500W 4-ohm Dual (per ch.) they are to provide the many years of reliable •...
  • Page 6: How To Use This Manual

    CTs 2-Channel Power Amplifiers 1 Welcome ® 2 How to Use This Features (continued from page 4) • Legendary Crown class I (BCA ) and ® class AB+B (Multi-Mode ) output topol- Manual ogies offer the best in amplifier reliability. •...
  • Page 7: Setup

    CTs 2-Channel Power Amplifiers 3 Setup 3.1 Unpack Your Amplifier 3.2 Install Your Amplifier 3.3 Ensure Proper Cooling Please unpack and inspect your amplifier for CAUTION: Before you begin, make sure When using an equipment rack, mount units any damage that may have occurred during your amplifier is disconnected from the directly on top of each other.
  • Page 8: Choose Input Wire And Connectors

    CTs 2-Channel Power Amplifiers 3 Setup 3.4 Choose Input Wire and Connectors Figure 3.3 shows connector pin assignments for balanced wiring, and Figure 3.4 shows connec- Figure 3.3 tor pin assignments for unbalanced wiring. Balanced Input Connector Wiring NOTE: Custom wiring should only be per- formed by qualified personnel.
  • Page 9: Wire Your System

    CTs 2-Channel Power Amplifiers 3 Setup 3.6 Wire Your System 3.6.1 Dual 8/4/2 Mode Typical input and output wiring, along with Attenuator and Mode Switch settings are shown in Figures 3.6 and 3.7. Make sure the Mode switch is set to the “Dual” posi- tion when operating in Dual mode.
  • Page 10: Dual 70V/100V Mode

    CTs 2-Channel Power Amplifiers 3 Setup 3.6.3 Dual 70V/100V Mode Typical input and output wiring, along with Atten- uator and Mode Switch settings are shown in Fig- ures 3.10 and 3.11. Make sure the Mode switch is set to the “Dual” position when operating in Dual mode.
  • Page 11: Dual Mode With "Y" Input

    CTs 2-Channel Power Amplifiers 3 Setup 3.6.5 Dual Mode with “Y” Input See Figure 3.14. This configuration feeds a mono signal to both Channel 1 and Channel 2. In the example in Figure 3.14, Channel 1 is driving a low- impedance loudspeaker and Channel 2 is driving a loudspeaker with a 70V transformer.
  • Page 12: Connect To Ac Mains

    CTs 2-Channel Power Amplifiers 3 Setup 4 Operation 3.7 Connect to AC Mains On the back panel, check whether your amplifier is labeled for 120V or 220-240V AC mains. Connect your amplifier 4.1 Precautions to the corresponding AC mains power source (power out- Your amplifier is protected from internal and external let) with the supplied AC power cordset.
  • Page 13: Front Panel Controls And Indicators

    CTs 2-Channel Power Amplifiers 4 Operation Power Indicator 4.2 Front Panel Controls Signal Indicators Blue LED indicates AC power has been and Indicators Three green LEDS per channel indicate the applied and is within the safe operating amplifier’s input and output signal levels. range of the power supply.
  • Page 14: Back Panel Controls And Connectors

    CTs 2-Channel Power Amplifiers 4 Operation The “Y” Input Switch also can be used to 4.3 Back Panel Controls Sensitivity Switches Behind the input panel are the Input Sensi- daisy-chain the signal to another amplifier. and Connectors. tivity Switches. One 3-position switch per See Section 3.6.5 for details.
  • Page 15: Advanced Features And Options

    CTs 2-Channel Power Amplifiers 5 Advanced Features and Options NOTE: For detailed information about 5.1.3 Fault 5.1.9 Inrush Limiting these Crown amplifier features, please The amplifier will light the Fault LED if the A soft-start circuit in the power supply mini- consult the Crown Amplifier Application mizes the amplifier’s current draw during amplifier output stage stops operating.
  • Page 16: Input Sensitivity Switches

    CTs 2-Channel Power Amplifiers 5 Advanced Features and Options 5.2.4 Input Sensitivity Switches 5.3 Options T-170V: See Figure 5.3. This is an autoformer that To access the Input Sensitivity Switches, turn off the amplifier and remove the allows 100V output from the CTs 600/1200, and PIP2-BBY Input Panel.
  • Page 17: Nominal Attenuation Settings

    CTs 2-Channel Power Amplifiers 5 Advanced Features and Options 5.3.1 Nominal Attenuation Settings The signal level for each input can be attenuated accurately by adjusting the 21-step Level Control (see Section 4.3). Figure 5.5 shows the attenuation in dB for each detent. The setting of the input-sensitivity switch varies the actual attenation as shown.
  • Page 18: Troubleshooting

    CTs 2-Channel Power Amplifiers 6 Troubleshooting CONDITION: Power indicator is CONDITION: Fault indicator is off. flashing. POSSIBLE REASON POSSIBLE REASON: • The amplifier has lost AC power. • The amplifier channel has stopped operat- • The amplifier’s Power switch is off. ing.
  • Page 19 CTs 2-Channel Power Amplifiers 6 Troubleshooting CONDITION: Data indicator not flash- ing, even though PIP module is CONDITION: No sound, even though installed and host computer IQ soft- the amp has power. Power LED is on with- ware is active. out flashing and the amp is receiving an input sig- POSSIBLE REASON: nal.
  • Page 20: Specifications

    CTs 2-Channel Power Amplifiers 7 Specifications Minimum Guaranteed Power CTs 600 CTs 1200 CTs 2000 CTs 3000 (20 Hz - 20 kHz) Power at 0.1% THD Power at 0.1% THD Power at 0.35% THD Power at 0.35% THD 2-ohm Dual (per ch.)
  • Page 21 CTs 2-Channel Power Amplifiers 7 Specifications Performance CTs 600 CTs 1200 CTs 2000 CTs 3000 Maximum Input Level Before input compression +20 dBu +20 dBu +20 dBu +20 dBu Absolute maximum + 32 dBu + 32 dBu + 32 dBu...
  • Page 22 CTs 2-Channel Power Amplifiers 7 Specifications Figure 7.2 CTs 600/1200 Typical Crosstalk vs. Frequency Figure 7.1 CTs 600/1200 Typical Frequency Response (1 W, 8 ohms) Figure 7.3 CTs 600/1200 Typical Damping Factor vs. Frequency page 22 Operation Manual...
  • Page 23 CTs 2-Channel Power Amplifiers 7 Specifications Figure 7.4 CTs 2000/3000 Typical Frequency Response (1W) Figure 7.5 CTs 2000/3000 Typical Crosstalk vs. Frequency Figure 7.6 CTs 2000/3000 Typical Damping Factor vs. Frequency Operation Manual page 23...
  • Page 24: Ac Power Draw And Thermal Dissipation

    CTs 2-Channel Power Amplifiers 8 AC Power Draw and Thermal Dissipation AC Power Draw and Thermal Dissipation: Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120VAC mains. Line current figures for 230VAC units derived by multiplying 120VAC figures by 0.5. Data based on all channels driven.
  • Page 25 Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120VAC mains. Line current figures for 230VAC units derived by multiplying 120VAC figures by 0.5. Data based on all channels driven. CTs 1200 Rated Line Current Line Current...
  • Page 26 CTs 2-Channel Power Amplifiers 8 AC Power Draw and Thermal Dissipation AC Power Draw and Thermal Dissipation: Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120VAC mains. Data based on all channels driven. Line current figures for 230VAC units derived by multiplying 120VAC figures by 0.5.
  • Page 27 CTs 2-Channel Power Amplifiers 8 AC Power Draw and Thermal Dissipation AC Power Draw and Thermal Dissipation: Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120VAC mains. Data based on all channels driven. Line current figures for 230VAC units derived by multiplying 120VAC figures by 0.5.
  • Page 28: Service

    CTs 2-Channel Power Amplifiers 9 Service Crown amplifiers are quality units that rarely require 9.2.2 Factory Service vice at the number listed below. For non-war- servicing. Before returning your unit for servicing, ranty service, you may also provide your own To obtain factory service, fill out the service please contact Crown Technical Support to verify shipping pack, however we still recommend...
  • Page 29: Warranty

    CTs 2-Channel Power Amplifiers 10 Warranty UNITED STATES & CANADA ing interest, insurance, closing costs, and other FROM ANY DEFECT IN THE NEW CROWN SUMMARY OF WARRANTY finance charges less a reasonable depreciation PRODUCT. THIS INCLUDES ANY DAMAGE TO Crown International, 1718 West Mishawaka on the product from the date of original pur- ANOTHER PRODUCT OR PRODUCTS RESULT- Road, Elkhart, Indiana 46517-4095 U.S.A.
  • Page 30 CTs 2-Channel Power Amplifiers 10 Warranty WORLDWIDE EXCEPT USA & CANADA SUMMARY OF WARRANTY WHAT THE WARRANTOR WILL DO DISCLAIMER OF CONSEQUENTIAL AND INCIDENTAL DAMAGES Crown International, 1718 West Mishawaka Road, We will remedy any defect, regardless of the rea- Elkhart, Indiana 46517-4095 U.S.A.
  • Page 31 CTs 2-Channel Power Amplifiers Crown Factory Service Information Shipping Address: Crown Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517 Phone: 1-800-342-6939 or 1-574-294-8200 Fax: 1-574-294-8124 Owner’s Name : ________________________________________________________________________________________________________________________________________________________________ Shipping Address: ______________________________________________________________________________________________________________________________________________________________ Phone Number: ________________________________Fax Number: ________________________________ Email ________________________________________________________________________________ Model: __________________________________________________________________________________ Serial Number: ________________________________________________________________________ Purchase Date : ________________________________________________________________________________________________________________________________________________________________ NATURE OF PROBLEM...

This manual is also suitable for:

Cts 600Cts 2000Cts 30001200Cts series

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