Crown Com-Tech CT-1600 Reference Manual
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Crown Com-Tech CT-1600 Reference Manual

Crown com-tech ct-1600: reference guide
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COM-TECH
Com-Tech 200, 400, 800 & 1600
Some models may be exported under the name Amcron .
Copyright ©1995 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A.
Telephone: 219-294-8000. Com-Tech amplifiers are produced by the Professional Audio Division of
Crown International, Inc. Trademark Notice: SmartAmp ,
bridge
are trademarks and Amcron ,
™
and TEF
®
are registered trademarks of Crown International, Inc. Other trademarks are the property of
their respective owners.
120 VAC
Approved for
North
THX Theatre
American
Systems
(CT-400 & 800)
Units:
ODEP
IOC
SPI
CH1
CH2
ODEP
IOC
SPI
CH1
CH2
ODEP
IOC
SPI
CH1
CH2
ODEP
IOC
SPI
CH1
CH2
Models:
™
MPX-6 ,
™
Crown ,
Techron ,
Com-Tech ,
®
®
®
Commercial
Audio
E106377
®
®
ENABLE
P OW E R
OFF
ENABLE
P OW E R
OFF
ENABLE
P OW E R
OFF
ENABLE
P OW E R
OFF
®
SMX-6 ,
™
AMB-5
™
and Grounded
IOC ,
ODEP ,
IQ System ,
P.I.P.
®
®
®
®
Fire Protective
Signaling
S5206
®
®
Commercial
®
Audio
LL 32521C
K80636-2
3/95

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Summary of Contents for Crown Com-Tech CT-1600

  • Page 1 Com-Tech 200, 400, 800 & 1600 Some models may be exported under the name Amcron . Copyright ©1995 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 219-294-8000. Com-Tech amplifiers are produced by the Professional Audio Division of Crown International, Inc.

  • Page 2: North America

    Warranty. ITEMS EXCLUDED FROM THIS CROWN WARRANTY This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product which has been damaged because of any intentional misuse, accident, negligence, or loss which is covered under any of your insurance contracts.

  • Page 3: Fire Protective Signaling

    Nor does it cover every possible situation which may arise during installation, operation or maintenance. If your unit bears the name “Amcron, ” please substitute it for the name “Crown” in this manual. If you need special assistance beyond the scope of this manual, please contact our Technical Support Group.

  • Page 4: Table Of Contents

    1 Welcome ... 7 1.1 Unpacking ... 7 1.2 Features ... 7 2 Facilities ... 8 3 Installation ... 10 3.1 Mounting ... 10 3.2 Cooling ... 10 3.2.1 Cooling for Units without Internal Fans ... 11 3.2.2 Additional Cooling for Units with Internal Fans 11 3.3 Wiring ...
  • Page 5 Com-Tech 200/400/800/1600 Power Amplifiers Com-Tech Amplifiers (120 VAC, 60 Hz Units) ... 6 Front Facilities ... 8 Rear Facilities ... 9 Mounting Dimensions ... 10 Top View of a Rack-Mounted Unit ... 11 Extra Cooling with a Rack-Mounted Blower ... 12 Wiring for Dual 8/4 Ohm Mode ...

  • Page 6: Com-Tech Amplifiers (120 Vac, 60 Hz Units)

    Page 6 Fig. 1.1 Com-Tech Amplifiers (120 VAC, 60 Hz Units) ODEP ENABLE P OW E R ODEP ENABLE P OW E R ODEP ENABLE P OW E R ODEP ENABLE P OW E R...

  • Page 7: Welcome

    Only you, the consignee, may initiate a claim for shipping damage. Crown will be happy to cooper- ate fully as needed. Save the shipping carton as evi- dence of damage for the shipper’s inspection.

  • Page 8: Facilities

    In addition, turn-on occurs at zero crossing of the AC waveform, so Com-Tech amplifiers rarely need a power sequencer. (To change the turn-on delay time, contact Crown’s Technical Support Group.) See Section 4.4. H. Power Cord...

  • Page 9: Rear Facilities

    Com-Tech 200/400/800/1600 Power Amplifiers REG. U.S. PAT. OFF. PUSH TO RESET 4,330,809 4,611,180 MODEL: COM-TECH 200 MODEL: COM-TECH 400 SERIES AC VOLTS: 120 AMPS: 3.5 60 Hz AC VOLTS: 120 AMPS: 5.5 60 Hz INTERNATIONAL, INC. ® ELECTRONIC EQUIPMENT RATED OUTPUT: 150 W/CH INTO 4 OHMS MAXIMUM OUTPUT: 200 W/CH INTO 4 ELKHART, IN 46517 AT 1 KHz WITH 0.1% OR LESS THD.

  • Page 10: Installation

    3 Installation This section covers basic Com-Tech installation pro- cedures. If your amplifier will be used in a Fire Protec- tive Signaling application, refer to Section 9 as well. 3.1 Mounting Com-Tech amplifiers are designed for standard 19 inch (48.3 cm) rack mounting or stacking without a cabinet.

  • Page 11: Cooling For Units Without Internal Fans

    The most effective method is to install an internal fan which is available from Crown as an accessory (see Sec- tion 8.2). If you know in advance that an internal fan is...

  • Page 12: Wiring

    Please use care when making connections, selecting signal sources and controlling the output level. The load you save may be your own! Crown assumes no liability for damaged loads resulting from careless amplifier use or deliberate overpowering.

  • Page 13: Wiring For Dual 8/4 Ohm Mode

    Crown’s constant voltage computer (see Section 8.3). Dual mode lets each amplifier channel work indepen- dently like a “dual mono” or stereo amplifier. And if you...

  • Page 14: Wiring For Dual 70 Volt Mode

    140 volt output, you may need to cross-refer- ence the ratings of the step-down transformer taps with Crown’s constant voltage computer (see Section 8.3). If you need a single channel with higher power to drive a 70 volt line, use Parallel-Mono mode.

  • Page 15: Wiring For Bridge-Mono 70 Volt Mode (140 Volt Output)

    Com-Tech 200/400/800/1600 Power Amplifiers minals (see Figure 3.6 and the middle illustration in Figure 3.7). The positive lead from the load connects to the positive channel 1 terminal, and the negative (or ground) lead from the load connects to the positive channel 2 terminal.

  • Page 16: Wiring For Parallel-Mono 70 Volt, Bridge-Mono 8/4 Ohm And Parallel-Mono 8/4 Ohm Modes

    MIXER PUSH TO RESET Com-Tech Amplifier PARALLEL-MONO 70 VOLT MODE PARALLEL MONO MIXER Com-Tech Amplifier BRIDGE-MONO 8/4 OHM MODE MIXER Com-Tech Amplifier PARALLEL-MONO 8/4 OHM MODE Fig. 3.7 Wiring for Parallel-Mono 70 Volt, Bridge-Mono 8/4 Ohm and Parallel-Mono 8/4 Ohm Modes Page 16 CHANNEL 1 VOLT...

  • Page 17: Input Connection

    Com-Tech 200/400/800/1600 Power Amplifiers tween the positive (+) terminals of both channels. CAUTION: When Parallel-Mono wiring is installed, do not attempt to operate in Dual or Bridge-Mono mode until the wiring is removed (especially the jumper wire). Failure to do so will result in high distortion and exces- sive heating.

  • Page 18: Output Connection

    AC devices. 3.3.3 Output Connection Consider the power handling capacity of your load be- fore connecting it to the amplifier. Crown is not liable for damage incurred at any time due to overpowering. Fusing loudspeaker lines is highly recommended (see Section 3.3.4).

  • Page 19: Wire Size Nomograph

    (Under these circumstances, Crown’s IQ System is often used so amplifiers can be eas- ily monitored and controlled when they are located very near the loudspeakers.) In recording studios and home hi-fi, a damping factor of 500 or more is very desirable.

  • Page 20: Additional Load Protection

    damping factor is the value on the “Annealed Copper Wire” line. Note: Wire size increases as the AWG gets smaller . 7. If the size of the cable exceeds what you want to use, (1) find a way to use shorter cables, like using the IQ System , (2) settle for a lower damping factor, or (3) use more than one cable for each line.

  • Page 21: Ac Mains Power

    Com-Tech 200/400/800/1600 Power Amplifiers mechanical damage from large transient voltages. In both cases, special fuses may be used to protect your loudspeakers, or you may opt for the convenience of a P.I.P. module that provides loudspeaker protection. Two different types of fuses are required for thermal protection and voltage protection.

  • Page 22: Operation

    11. Tampering with the circuitry by unqualified person- nel, or making unauthorized circuit changes may be hazardous and invalidates all agency listings. Remember: Crown is not liable for damage that results from overdriving other system components. Page 22 Com-Tech 200/400/800/1600 Power Amplifiers 4.2 Indicators...

  • Page 23: Protection Systems

    To do this, Crown established a rigorous program to measure the safe operating area (SOA) of each output device before installing it in an amplifier. Next, Crown designed intelligent circuitry to simulate the instanta- neous operating conditions of the output devices.

  • Page 24: Standby Mode

    SOA. Limiting is proportional and kept to an absolute minimum—only what is re- quired to prevent output device damage. This level of protection enables Crown to increase out- put efficiency to never-before-achieved levels while greatly increasing amplifier reliability.

  • Page 25: Controls

    Crown’s Technical Support Group. A three-position input sensitivity switch is located in- side the amplifier’s P.I.P. compartment. It is set at the factory to a sensitivity of 0.775 volts (8/4 ohm mode).

  • Page 26: Technical Information

    5 Technical Information 5.1 Overview Com-Tech amplifiers incorporate several new techno- logical advancements including real-time computer simulation, low-stress output stages, an advanced heat sink embodiment and the Programmable Input Processor ( P.I.P. ) expansion system. Custom circuitry is incorporated to limit temperature and current to safe levels making it highly reliable and tolerant of faults.

  • Page 27: Circuit Block Diagram

    Com-Tech 200/400/800/1600 Power Amplifiers Fig. 5.1 Circuit Block Diagram Page 27...

  • Page 28: Bridge-Mono Operation

    (+) output terminals on the back panel, twice the voltage can be output. The channel 1 output feeds the channel 2 error amp U204-A. Because there is a net inversion, the channel 2 output is out of polarity with channel 1. This produces twice as much voltage across the load.

  • Page 29: Specifications

    Approved for North THX Theatre American Systems (CT-400 & 800) Units: 6 Specifications The following specifications apply to all models in Dual mode with 8 ohm loads and an input sensitivity of 26 dB unless otherwise specified. In Fire Protective Signaling Applica- tions, the specifications in Section 9 supersede several of the specifications that follow.
  • Page 30 Parallel-Mono mode: 440 watts into 2 ohms. 440 watts into 4 ohms. 455 watts with 70 volt output. Com-Tech 800 Dual mode (with both channels driven): 490 watts into 4 ohms. 305 watts into 8 ohms. 460 watts with 70 volt output. Bridge-Mono mode: 975 watts into 8 ohms.
  • Page 31 Turn-on occurs at zero crossing of the AC waveform, so power sequencers are rarely needed with multiple units. Note: The turn-on delay time may be changed. Contact Crown’s Techni- cal Support Group for details. Circuit Breaker: Circuit breaker current ratings vary based on the Com-Tech model and AC mains voltage.

  • Page 32: Com-Tech 200 Minimum Power Matrix

    When measuring power, 0.1% THD appears to be the industry standard for distortion. Two of the maximum average power specifications shown in each minimum power matrix are measured at 0.1% THD so you can easily compare Crown specifica- tions to those of other manufacturers. But this high level of distortion actually allows for some clipping which is undesirable.

  • Page 33: Com-Tech 400 Minimum Power Matrix

    Com-Tech 200/400/800/1600 Power Amplifiers Com-Tech 400 – Dual/Mono Mode Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono Minimum Guaranteed Power (Watts) Maximum Average At 0.1% THD At 0.1% THD At 0.05% THD (See note 1)

  • Page 34: Com-Tech 800 Minimum Power Matrix

    Com-Tech 800 – Dual/Mono Mode Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono Page 34 Minimum Guaranteed Power (Watts) Maximum Average At 0.1% THD At 0.1% THD At 0.05% THD (See note 1)

  • Page 35: Com-Tech 1600 Minimum Power Matrix

    Com-Tech 200/400/800/1600 Power Amplifiers Com-Tech 1600 – Dual/Mono Mode Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono Minimum Guaranteed Power (Watts) Maximum Average At 0.1% THD At 0.1% THD At 0.05% THD (See note 1)

  • Page 36: Com-Tech 200 Maximum Power Matrix

    Maximum Power Specifications Crown’s maximum power specifications represent the largest amount of output power you can expect from your amplifier when it is driven to full output under the given conditions. These specifications can be used to prevent loudspeaker and hearing damage.

  • Page 37: Com-Tech 400 Maximum Power Matrix

    Com-Tech 200/400/800/1600 Power Amplifiers Dual/Mono Mode Dual (both channels driven) 25 (70V) Bridge-Mono (balanced output) 50 (140V) Parallel-Mono 12.5 (70V) Dual (both channels driven) 25 (70V) Bridge-Mono (balanced output) 50 (140V) Parallel-Mono 12.5 (70V) Dual (both channels driven) 25 (70V) Bridge-Mono (balanced output) 50 (140V)

  • Page 38: Com-Tech 800 Maximum Power Matrix

    Dual/Mono Mode Dual (both channels driven) 12.5 (70V) Bridge-Mono (balanced output) 25 (140V) Parallel-Mono 6.25 (70V) Dual (both channels driven) 12.5 (70V) Bridge-Mono (balanced output) 25 (140V) Parallel-Mono 6.25 (70V) Dual (both channels driven) 12.5 (70V) Bridge-Mono (balanced output) 25 (140V) Parallel-Mono 6.25 (70V) Page 38...

  • Page 39: Com-Tech 1600 Maximum Power Matrix

    Com-Tech 200/400/800/1600 Power Amplifiers Dual/Mono Mode Dual (both channels driven) 6.25 (70V) Bridge-Mono (balanced output) 12.5 (140V) Parallel-Mono 3.13 (70V) Dual (both channels driven) 6.25 (70V) Bridge-Mono (balanced output) 12.5 (140V) Parallel-Mono 3.13 (70V) Dual (both channels driven) 6.25 (70V) Bridge-Mono (balanced output) 12.5 (140V)

  • Page 40: Typical Frequency Response

    –1 –2 –3 –4 –5 –6 –7 1400 1200 1000 504.0 126.8 MILLIOHMS 31.8 Page 40 Com-Tech 200/400/800/1600 Power Amplifiers FREQUENCY (Hz) Fig. 6.9 Typical Frequency Response FREQUENCY (Hz) Fig. 6.10 Typical Damping Factor FREQUENCY (Hz) Fig. 6.11 Typical Output Impedance 8 ohm 1 watt 4 ohm...

  • Page 41: Typical Phase Response

    Com-Tech 200/400/800/1600 Power Amplifiers +45˚ 0˚ –45˚ –66 –72 –78 –84 –90 –96 –102 TECHRON TEF ® FREQUENCY (Hz) Fig. 6.12 Typical Phase Response TECHRON TEF ® FREQUENCY (Hz) Fig. 6.13 Typical Crosstalk ® Measurement 10 K 20 K ® Measurement 10 K 20 K...

  • Page 42: Ac Power Draw And Thermal Dissipation

    7 AC Power Draw and Thermal Dissipation This section provides detailed information about the amount of power and current drawn from the AC mains by Com-Tech amplifiers and the amount of heat produced under various conditions. The calculations presented here are intended to provide a realistic and reliable depiction of the amplifiers.

  • Page 43: Com-Tech 400 Power Draw, Current Draw And Thermal Dissipation At Various Duty Cycles

    Com-Tech 200/400/800/1600 Power Amplifiers 8 Ohm Dual / 16 Ohm Bridge-Mono / 4 Ohm Parallel-Mono AC Mains Current Draw (Amps) Thermal Dissipation Power Duty Draw Cycle 100-120 V 220-240 V btu/hr (Watts) Fig. 7.2 Com-Tech 400 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles 8 Ohm Dual / 16 Ohm Bridge-Mono / 4 Ohm Parallel-Mono AC Mains Current Draw (Amps)

  • Page 44: Accessories

    P.I.P. DATA OUT CROWN Programmable Input Processor IQ-P.I.P. v1.3 integrates the amplifier into Crown’s pat- ented IQ System . ® computer control of 1 to 2,000 amplifiers. Each ampli- fier channel can be monitored and controlled from an inexpensive personal computer. Any combination of...
  • Page 45 RFI suppression. Input isola- tion transformers are optional. For more information on these or other P.I.P.s under development, contact your local dealer or Crown’s Tech- nical Support Group. – –...

  • Page 46: Cooling Fan Option (120 Vac, 60 Hz Only)

    100 or 140 volts). Other scales include line loss, paral- lel resistance, dB-SPL vs. distance and dB-SPL vs. power. To get your own constant voltage computer, call Crown’s Technical Support Group and ask for lit- erature. F11106-6 or D 8439-8 A10110-70605 SUB–CHASSIS...

  • Page 47: Fire Protective Signaling

    Com-Tech 1600 is rated for 350 watts per channel. All models have a power bandwidth for this specification of 800 to 2,800 Hz. Crown guaran- tees these specification in accordance with the el- evated operating temperature and strenuous condi- tions associated with emergency operation.

  • Page 48: Service

    UPS ground. Please contact us if other arrangements are required. Factory Service Shipping Instructions: 1. When sending a Crown product to the factory for service, be sure to fill out the service information form that follows and enclose it inside your unit’s shipping pack.
  • Page 49 Com-Tech 200/400/800/1600 Power Amplifiers Crown Factory Service Information Shipping Address: Crown International, Inc., Factory Service, 57620 C.R. 105, Elkhart, Indiana 46517 Phone: 1-800-342-6939 or 1-219-294-8200 Fax: 1-219-294-8301 Owner’s Name: _________________________________________________________________________ Shipping Address: ______________________________________________________________________ Phone Number: ________________________________________________________________________ Model: ________________________ Serial Number: ______________ Purchase Date: ___________ (Be sure to describe the conditions that existed when the problem occurred and what attempts were made to correct it.)

This manual is also suitable for:

Com-tech ct-400Com-tech ct-200Com-tech ct-800Com-tech 200Com-tech 400Com-tech 800 ... Show all

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