ComTech DriveCore Operation Manual CT 475 CT 4150 CT 875 CT 8150 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.
CT Power Amplifiers Important Safety Instructions Wichtige Sicherheitsinstruktionen Importantes Instructions de Sécurité Instrucciones de Seguridad Importantes 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 accordance with the manufacturer’s instructions. 8.
CT Power Amplifiers DECLARATION of CONFORMITY ISSUED BY: Harman International 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A.
CT Power Amplifiers Table of Contents Important Safety Instructions ....................................... 2 13.1 Protection Systems.......................................... 14 Declaration of Conformity ............................................ 3 13.1.1 Thermal Indicator..................................... 14 1 Welcome .......................................... 5 13.1.2 Fault........................................................ 14 1.1 Features .............................................
CT Power Amplifiers 1 Welcome Crown ® ComTech DriveCore™ amplifiers provide state-of-the-art technology for installed sound applications. The ComTech amplifiers provide noiseless operation and small footprint with excellent quality and performance. ComTech DriveCore amplifiers offer: 1.1 Features Audiophile Sound • A signal-to-noise ratio of better than 110dB • Total harmonic distortion below 0.05% across the full audio bandwidth • Greater than 70dB crosstalk • Frequency response of ±0.
CT Power Amplifiers 4 Setup 4.1 Unpack Your Amplifier Please unpack and inspect your amplifier for any damage that may have occurred during transit. If damage is found, notify the transportation company immediately. Only you can initiate a claim for shipping damage. Crown will be happy to help as needed. Save the shipping carton as evidence of damage for the shipper’s inspection. We also recommend that you save all packing materials so you will have them if you ever need to transport the unit.
CT Power Amplifiers 4 Setup 4.4 Choose Input Wire and Connectors Crown recommends using pre-built or professionally wired balanced line (twoconductor plus shield). Balanced wiring provides better rejection of unwanted noise and hum but unbalanced line may also be used. For more information, refer to the Crown Amplifier Application Guide, available online at www. crownaudio.com. Use 3-pin Phoenix-type cable ends at the amp input connectors. Figure 4.4.
CT Power Amplifiers 4 Setup 4.6 Wire Your System Before you wire your system, you must be familiar with the capabilities of the input routing. The DriveCore amplifier can be configured in two ways: CHANNEL 2 CHANNEL 3 CHANNEL 4 DRIVECORE AMPLIFIER CHANNEL 1 CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 DRIVECORE AMPLIFIER 1. The input for a channel goes out the same channel. This option is the standard configuration. 2.
CT Power Amplifiers 4 Setup 5 Precautions 4.8 Startup Procedure Use the following procedure when first turning on your amplifier: 1. Turn down the level of your audio source. 2. Turn down the level controls of the amplifier (see Section 7.6). 3. Turn on the “Power” switch. The Power indicator should glow. 4. Turn up the level of your audio source to an optimum level. 5. Turn up the Level controls on the amplifier until the desired loudness or power level is achieved.
CT Power Amplifiers 6 Front Panel 1 2 1. Fault Indicator • Red LED • One per output channel • Flashes when the amplifier output channel has stopped operating. Usually this means that the amplifier must be serviced. (See Section 15 Troubleshooting) 2. Thermal Indicator • Red LED • One per output channel • If exceeds Thermal Limits, output channels will shut down in pairs until thermal levels are within tolerant ranges.
CT Power Amplifiers 7 Back Panel 1 2 3 4 5 1. AC Power Inlet • Standard IEC type 320 inlet for detachable connector • 100-240V 2. Reset Button/Breaker • Push button switch • Resets the circuit breaker that protects the power supply • A circuit breaker located near the IEC power inlet protects the amplifier from excessive AC current draw. 3. Auxiliary Connector • 3-pin Phoenix type connector • Allows for amp to be placed in DEEP SLEEP mode and monitoring of AMP STATUS (see Section 10.
CT Power Amplifiers 8 Amp Configuration 9 Operating Modes 8.1 70Hz HPF (High Pass Filter) On the back panel, one 2-position high-pass filter switch will only allow signals above 70Hz to be amplified. This is to prevent transformer saturation. The HPF, when turned on, is activated for all channels. The filter is a 2nd order 12 dB/occ t filter. DriveCore Amplifiers can work in a variety of power modes. 8.2 Limiter The limiter reduces amplifier gain to allow over drive without harsh clipping at output.
CT Power Amplifiers 10 Auxiliary Port 11 Input Routing 10.1 Deep Sleep In deep sleep mode, the amp consumes less than 1 watt of power. It is activated via the AUX port with a ground closure. This amplifier can route a single channel to the next numbered channel. To bring the amplifier out of deep sleep, remove the ground closure via the AUX port. 10.
CT Power Amplifiers 13 Advanced Features 13.1 Protection Systems Your Crown amplifier provides extensive protection and diagnostic capabilities, including thermal level control, fault indicators, high-pass filtering, DC protect, AC under/over voltage protection, inrush limiting, and a convection-cooled chassis. 13.1.1 Thermal Indicator If the amplifier becomes too hot for safe operation, the channel that is generating too much heat will be shut down until the temperature is reduced. 13.1.
CT Power Amplifiers 15 Troubleshooting FLASHING CONDITION: Thermal indicator is flashing 15.1 Power Indicator POSSIBLE REASON OFF • Amplifier has become too hot to operate. Allow amplifier to cool. Amplifier will not pass audio if amplifier has become too hot CONDITION: Power indicator is OFF. POSSIBLE REASON • • • • The amplifier has lost AC power. The amplifier’s Power switch is off. The amplifier is not plugged into the power receptacle.
CT Power Amplifiers 16 Specifications Performance Channels Sensitivity Rated Power Output Signal to Noise Ratio (below rated power 20Hz to 20kHz, A-Weighted) CT475 4 1.4V* 75W per channel into 8/4 ohms CT4150 4 1.4V* 125W per channel into 8/4 ohms CT875 8 1.4V* 75W per channel into 8/4 ohms CT8150 8 1.4V* 125W per channel into 8/4 ohms 110 dB 110 dB 110 dB 110 dB Total Harmonic Distortion (THD) (full rated power, 1kHz) < 0.05% < 0.05% < 0.05% < 0.
CT Power Amplifiers 17 AC Power Draw and Thermal Dissipation AC Power Draw and Thermal Disspation: Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120/240 VAC mains. Data based on all channels driven at 8 Ohms. ComTech DriveCore 475 120VAC Watts out 240VAC Watts Out Per 1A Line Current Watts Dissipated Thermal Dispation Watts Out Per 1A Line Current Watts Dissipated Load Watts in Idle (Deep Sleep) - 0.9 <0.1 1.00 0.90 1 3.
CT Power Amplifiers 17 AC Power Draw and Thermal Dissipation AC Power Draw and Thermal Disspation: Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120/240 VAC mains. Data based on all channels driven at 8 Ohms.
CT Power Amplifiers 17 AC Power Draw and Thermal Dissipation AC Power Draw and Thermal Disspation: Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120/240 VAC mains. Data based on all channels driven at 8 Ohms. ComTech DriveCore 875 120VAC Watts out 240VAC Watts Out Per 1A Line Current Watts Dissipated Thermal Dispation Watts Out Per 1A Line Current Watts Dissipated Load Watts in Idle (Deep Sleep) - 0.9 <0.1 1.00 0.90 <0.
CT Power Amplifiers 17 AC Power Draw and Thermal Dissipation AC Power Draw and Thermal Disspation: Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120/240 VAC mains. Data based on all channels driven at 8 Ohms. ComTech DriveCore 8150 120VAC Watts out 240VAC Watts Out Per 1A Line Current Watts Dissipated Thermal Dispation Watts Out Per 1A Line Current Watts Dissipated Load Watts in Idle (Deep Sleep) - 0.9 <0.1 1.00 1.00 <0.
CT Power Amplifiers 18 Service Crown amplifiers are quality units that rarely require servicing. Before returning your unit for service, please contact Crown Technical Support to verify the need for servicing. Remember to transport the unit in the original factory pack. A list of authorized service centers in your area can be obtained from Crown Factory Service, or online from http://www.crownaudio.com/support/servcent.htm.
CT Power Amplifiers 19 Warranty 18.1 UNITED STATES & CANADA SUMMARY OF WARRANTY 3 AR YE Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUBSEQUENT OWNER of each NEW Crown product, for a period of three (3) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown productis free of defects in materials and workmanship.
CT Power Amplifiers 19 Warranty 3 AR YE 18.2 WORLDWIDE EXCEPT USA & CANADA SUMMARY OF WARRANTY WHAT THE WARRANTOR WILL DO Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A.
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CT Power Amplifiers PRODUCT REGISTRATION Online registration is also available at http://crownweb.crownintl.com/webregistration. Crown Audio, Inc. 1718 W. Mishawaka Rd. Elkhart, IN 46517-9439 Phone: 574-294-8000 Fax: 574-294-8329 www.crownaudio.com Warranty is only valid within the country in which the product is purchased. When this form is used to register your product, it may be mailed or faxed. Crown Audio, Inc.
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CT Power Amplifiers Crown Audio Factory Service Information Shipping Address: Crown Audio Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517 PLEASE PRINT CLEARLY SRA #: __________________(If sending product to Crown factory service.