1. Manuals
  2. Brands
  3. Crown Manuals
  4. Amplifier
  5. Com-Tech CT-210
  6. Reference manual

Crown Com-Tech CT-210 Reference Manual

Crown com-tech ct-210: reference guide
Hide thumbs Also See for Com-Tech CT-210:
Table of Contents

Advertisement

Quick Links

COM-TECH®
© 2001 by Crown Audio, Inc., P.O. Box 1000, Elkhart, IN 46515-1000 U.S.A. Telephone: 219-294-8000. Fax: 219-294-8329. Trademark
Notice: Amcron
®
, BCA
®
and Crown
respective owners.
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 219-294-8200.
Note:
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.
Models:
Com-Tech 210, 410, 810 & 1610
Some models may be exported under the name Amcron .
®
are registered trademarks of Crown International, Inc. Other trademarks are the property of their
Applies to
CT-410 and CT-810
Crown and Amcron
models
®
101969-6
3/01

Advertisement

Table of Contents
loading

Related Manuals for Crown Com-Tech CT-210

Summary of Contents for Crown Com-Tech CT-210

  • Page 1 Crown International, Inc. Other trademarks are the property of their respective owners. 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 219-294-8200. Note: The information provided in this manual was deemed accurate as of the publication date.
  • Page 2 Com-Tech Power Amplifiers This page intentionally left blank Page 2 Reference Manual...

  • Page 3: Important Safety Instructions

    Com-Tech Power Amplifiers Important Safety Instructions 1) Read these instructions. 2) Keep these instructions. 3) Heed all warnings. 4) Follow all instructions. 5) Do not use this apparatus near water. 6) Clean only with a dry cloth. 7) Do not block any ventilation openings. Install in ac- 8) Do not install near any heat sources such as radia- 9) Do not defeat the safety purpose of the polarized or 10) Protect the power cord from being walked on or...

  • Page 4: 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 5: Magnetic Field

    Nor does it cover every possible situation which may arise during installation, operation or mainte- nance. 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 6: Table Of Contents

    1 Welcome ... 9 1.1 Unpacking ... 9 1.2 Features ... 9 2 Facilities ... 10 3 Installation ... 12 3.1 Mounting ... 12 3.2 Cooling ... 12 3.2.1 Cooling for Units without Internal Fans ... 13 3.2.2 Additional Cooling for Units with Internal Fans . 13 3.3 Wiring ...
  • Page 7 Com-Tech Power Amplifiers Com-Tech Amplifiers (120 VAC, 60 Hz Units) ... 8 Front Facilities ... 10 Rear Facilities ... 11 Mounting Dimensions ... 12 Top View of a Rack-Mounted Unit ... 13 Extra Cooling with a Rack-Mounted Blower ... 14 Wiring for Dual 8/4 Ohm Mode ...

  • Page 8: Com-Tech Amplifiers (120 Vac, 60 Hz Units)

    Com-Tech Power Amplifiers Fig. 1.1 Com-Tech Amplifiers (120 VAC, 60 Hz Units) Page 8 Reference Manual...

  • Page 9: Welcome

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

  • Page 10: Facilities

    “randomness”. Turn-on inrush is lim- ited by Soft-Start circuitry, so Com-Tech amplifiers never need a power sequencer. (To change the turn-on delay time, contact Crown’s Technical Support Group.) H. Power Cord All 120 VAC, 60 Hz North American units have a NEMA 5-15P plug with an integral voltage presence lamp.

  • Page 11: Rear Facilities

    Com-Tech Power Amplifiers J. Dual/Mono Switch For 8- and 4-ohm operation, remove the cover plate, if so equipped, then slide this switch to the center for Dual (two-channel) mode, to the left for Parallel-Mono mode or to the right for Bridge-Mono mode. WARNING: Do not change this switch unless the amplifier is turned off.

  • Page 12: Installation

    3 Installation This section covers basic Com-Tech installation proce- dures. All Com-Tech amplifiers are intended for rack mount installations using a commercial 19-inch (48.3-cm) EIA rack standard metal cabinet wired with a commercial grade electrical outlet box and recep- tacles. All Com-Tech Amplifiers utilize a convenient 3-foot long (0.9-m) power cord for such installations.

  • Page 13: Cooling For Units Without Internal Fans

    There are at least three ways to provide extra cooling for an amplifier that does not have an internal fan. The most effective method is to install an internal fan which is available from Crown as an accessory (refer to sub- RACK CABINET section 8.3).

  • Page 14: 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 15: Wiring For Dual 8/4 Ohm Mode

    Crown’s constant voltage computer (see Section 8.3). WARNING: The output mode switches must be set the same (8/4-ohm or 70-volt mode) when operating in Bridge-Mono or Parallel-Mono mode.

  • Page 16: Wiring For Dual 70 Volt Mode

    140-volt output, you may need to cross-reference 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 17: Wiring For Bridge-Mono 70 Volt Mode (140 Volt Output)

    Com-Tech Power Amplifiers WARNING: Both channels must be configured for the same output mode (8/4-ohm or 70-volt) before switching to Bridge-Mono mode. Bridge-Mono wiring is very different from the other modes and requires special attention. First, turn the amplifier off. Then select Bridge-Mono mode by sliding the dual/mono switch to the BRIDGE MONO (right) po- sition.

  • Page 18: 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 18 CHANNEL 1 VOLT REMOTE...

  • Page 19: Audio Input Connection

    Com-Tech Power Amplifiers To select Parallel-Mono mode, turn off the amplifier and slide the dual/mono switch to the PARALLEL MONO (left) position. Connect the input signal to Channel 1 only. The Channel 2 input jack and Input Attenuation control are bypassed in this mode, so they should not be used.

  • Page 20: Infrasonic Filter Capacitor Values

    4. Turn the entire system off before changing connections. Turn level controls down before powering the system back up. Crown is not liable for damage incurred when any trans- ducer or component is overdriven.

  • Page 21: Rsvp Input Connections

    Com-Tech Power Amplifiers Use Good Connectors 1. To prevent possible short circuits, do not expose the loudspeaker cable connectors. 2. Do not use connectors that might acciden- tally tie two channels together when making or breaking connections (for example, a standard three-wire stereo phone plug).

  • Page 22: Wire Size Nomograph

    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. Fus- ing loudspeaker lines is highly recommended (see Sec- tion 3.3.5). Also, please pay close attention to Section 4.1, Precautions .

  • Page 23: Additional Load Protection

    Com-Tech Power Amplifiers 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 24: Ac Power Requirements

    Example: Z = 8 ohms. Peak Power = 75 W Answer: Fuse = 1.5 A Fig. 3.16 Loudspeaker Fuse Nomograph fuses and high-frequency drivers are protected by high- speed instrument fuses. Depending on the application, you may want to use a PIP module to protect your loudspeakers.

  • Page 25: Operation

    11. Tampering with the circuitry by unqualified personnel, or making unauthorized circuit changes may be hazard- ous and invalidates all agency listings. Remember: Crown is not liable for damage that results from overdriving other system components. 4.2 Indicators The front panel of a Com-Tech amplifier has several helpful indicators.

  • Page 26: Protection Systems

    Page 26 Com-Tech Power Amplifiers 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 27: Standby Mode

    SOA. Limiting is proportional and kept to an absolute minimum—only what is required to pre- vent 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 28: Controls

    If it trips again or the unit fails to operate properly, contact an authorized service center or Crown’s Technical Support Group. A three-position input sensitivity switch is located in- side the amplifier’s PIP compartment. It is set at the fac- tory to a sensitivity of 0.775-volts (8/4-ohm mode).

  • Page 29: Energy Savings Circuit Application

    Com-Tech Power Amplifiers 4.5 Energy Saving Circuit Application The new CT-10 Series amplifiers incorporate a new feature to significantly decrease the use of energy when the amplifier is idle. The Energy Saving circuit allows the amplifier to cut back its energy consumption based on the signal level offered to the inputs.

  • Page 30: Circuit Theory

    From the error amp, the voltage translator stage chan- nels the signal to the Last Voltage Amplifiers (LVAs), de- pending on the signal polarity. The +LVA and the –LVA, with their push-pull effect through the bias servo, and drive the fully complementary output stage.

  • Page 31: Bridge-Mono Operation

    (+) output terminals on the back panel, twice the volt- age can be output. Reference Manual The Channel 1 output feeds the Channel 2 error amp. 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 32: Specifications

    6 Specifications The following specifications apply to all models in Dual mode with 8-ohm loads and an input sensitivity of 26 dB un- less otherwise specified. MAP at 1 kHz: This term refers to maximum average power in watts at 1 kHz with 0.1% THD. Full Bandwidth Power: This term refers to maximum aver- age power in watts from 20 Hz to 20 kHz with 0.1% THD.
  • Page 33 “Soft-start” circuitry provides low inrush so power sequencers are rarely needed with multiple units. Note: The turn-on delay time may be changed. Contact Crown’s Technical Support Group for details. Circuit Breaker: Circuit breaker current ratings vary based on the Com-Tech model and AC mains voltage.
  • Page 34 ments. Com-Tech 210 amplifiers are 3.5 inch (8.9 cm) high. North American models of Com-Tech 410 amplifi- ers are also 3.5 inch (8.9 cm) high. 50-Hz models of Com-Tech 410 amplifiers are 5.25 inch (13.3 cm) high. Com-Tech 810 amplifiers are 5.25 (13.3 cm) high. Com-Tech 1610 amplifiers are 7 inch (17.8 cm) high.

  • Page 35: Com-Tech 210 Minimum Power Matrix

    When measuring power, 0.1% THD appears to be the industry standard for distortion. Two of the maximum average power specifica- tions shown in each minimum power matrix are measured at 0.1% THD so you can easily compare Crown specifications to those of other manufacturers.

  • Page 36: Com-Tech 410 Minimum Power Matrix

    Com-Tech 410 – Minimum Guaranteed Power (Watts) 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 36 Maximum Average At 0.1% THD At 0.1% THD At 0.05% THD (See note 1)

  • Page 37: Com-Tech 810 Minimum Power Matrix

    Com-Tech Power Amplifiers Com-Tech 810 – Minimum Guaranteed Power (Watts) 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 Reference Manual Maximum Average At 0.1% THD At 0.1% THD At 0.05% THD...

  • Page 38: Com-Tech 1610 Minimum Power Matrix

    Com-Tech 1610 – Minimum Guaranteed Power (Watts) 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 38 Maximum Average At 0.1% THD At 0.1% THD At 0.05% THD (See note 1)

  • Page 39: Com-Tech 210 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 40: Com-Tech 410 Maximum Power Matrix

    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) Parallel-Mono 12.5 (70V) Page 40...

  • Page 41: Com-Tech 810 Maximum Power Matrix

    Com-Tech Power Amplifiers 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...

  • Page 42: Com-Tech 1610 Maximum Power Matrix

    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) Parallel-Mono 3.13 (70V) Fig.

  • Page 43: Typical Frequency Response

    Com-Tech Power Amplifiers –1 –2 –3 –4 –5 –6 –7 1400 1200 1000 504.0 126.8 MILLIOHMS 31.8 Reference Manual 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 44: Typical Phase Response

    +45˚ 0˚ –45˚ –66 –72 –78 –84 –90 –96 –102 Page 44 TECHRON TEF ® FREQUENCY (Hz) Fig. 6.12 Typical Phase Response TECHRON TEF ® FREQUENCY (Hz) Fig. 6.13 Typical Crosstalk Com-Tech Power Amplifiers ® Measurement 10 K 20 K ®...

  • Page 45: Ac Power Draw And Thermal Dissipation

    Com-Tech Power Amplifiers 7 AC Power Draw and Thermal Dissipation “ “ “ “ “ Soft-Start” inrush current limiting, protects the house circuit breaker when several amps are turned on simul- taneously. 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 pro- duced under various conditions.

  • Page 46: Com-Tech 410 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) Thermal Dissipation Power Duty Draw Cycle 100-120 V 220-240 V btu/hr (Watts) Fig. 7.2 Com-Tech 410 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 47: Accessories

    Processor with DSP (Digital Signal Processing) for PIP- compatible amplifiers. As a component of the IQ System, it connects the amplifier to the Crown Bus so the amplifier can be controlled and monitored. Its DSP capabilities enable it to be programmed with a variety of functions,...
  • Page 48 IQ-PIP-USP2 is an IQ2 -series component. This means it supports Crown’s UCODE protocol and requires an IQ System with an IQ2-compatible IQ interface. UCODE (universal code) enables users and third parties to develop custom software objects to control and monitor IQ2-compatible components like the IQ-PIP-USP2.

  • Page 49: Rsvp Module

    We recommend the kit if you will be operating a Com- Tech 210 at high levels, in high temperatures for long periods, or with high duty cycle input signal, (see Sec- tion 3.2.1). Contact an authorized Crown servicer for installation of the optional fan kit. 8.4 Constant Voltage Computer Crown’s constant voltage computer is a easy-to-use...

  • Page 50: Service

    Ac- cessories are not needed—do not send the product documentation, cables and other hard- ware. If you have any questions, please call or write the Crown Technical Support Group. Crown Customer Service Technical Support / Factory Service Plant 2 SW, 1718 W.
  • Page 51 Crown Factory Service Information Shipping Address: Crown Audio, Inc., Factory Service, Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, IN 46517 Phone: 1-800-342-6939 or 1-219-294-8200 Fax: 1-219-294-8124 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-810Com-tech ct-410Com-tech ct-1610

Table of Contents