D Series 30 HEADPHONES CHANNEL 1 20 40 50 LEVEL 0 30 CHANNEL 2 OFF IOC SIGNAL ON 20 40 D-45 10 50 10 LEVEL 0 POWER Operation Manual D-75A 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.
D Series Power Amplifiers Important Safety Instructions 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) page 2 Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
D Series Power Amplifiers DECLARATION of CONFORMITY Crown International, Inc. Issued By: Crown International, Inc. 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A. Sue Whitfield 574-294-8289 swhitfield@crownintl.
D Series Power Amplifiers Table of Contents page 4 Important Safety Instructions .......................................................2 3.2 Controls, Indicators and Connectors ...............................11 Declaration of Conformity ...........................................................3 3.3 Indicators ........................................................................12 1 Welcome ..................................................... 5 3.4 Controls ....................................
D Series Power Amplifiers 30 50 HEADPHONES CHANNEL 1 20 40 0 IOC SIGNAL 1 Welcome Reliability is the first thing you get with your purchase of a Crown power amplifier. The D-45 and D-75A both deliver dependable operation with a wide variety of loads. Because of their exceptional reliability, these amplifiers have become the leading choice of professionals for use in recording studios, laboratories and public facilities. You can even find them on the road.
D Series Power Amplifiers 2 Setup 2.1 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.
D Series Power Amplifiers 2 Setup 2.4 Choose Input Wire and Connectors Figure 2.3 shows connector pin assignments for balanced wiring, and Figure 2.4 shows connector pin assignments for unbalanced wiring. NOTE: Custom wiring should only be performed by qualified personnel. Figure 2.3 Balanced Input Connector Wiring Figure 2.4 Unbalanced Input Connector Wiring 2.
D Series Power Amplifiers 2 Setup 2.6 Wire Your System 2.6.1 Dual Mode Typical input and output wiring is shown in Figure 2.6. INPUTS: Connect input wiring for each channel. OUTPUTS: Maintain proper polarity (+/-) on output connectors. Connect Channel 1 positive (+) speaker load to Channel 1 positive terminal of amp; repeat for negative (-). Repeat each channel wiring as for Channel 1. Refer to Section 2.5 for output connector pin assignments. Figure 2.6 System Wiring for Dual Mode 2.6.
D Series Power Amplifiers 2 Setup 2.7 Connect to AC Mains Connect your amplifier to the AC mains power source (power outlet) with the supplied AC power cordset. WARNING: The third prong of this connector (ground) is an important safety feature. Do not attempt to disable this ground connection by using an adapter or other methods. Amplifiers don’t create energy. The AC mains voltage and current must be sufficient to deliver the power you expect.
D Series Power Amplifiers 3 Operation 3.1 Precautions Your amplifier is protected from internal and external faults, but you should still take the following precautions for optimum performance and safety: 1. Before use, your amplifier first must be configured for proper operation, including input and output wiring hookup. Improper wiring can result in serious operating difficulties.
D Series Power Amplifiers 3 Operation 3.2 Controls, Indicators and Connectors Figure Figure 3.1 shows the controls, indicators and connectors on the front panel and back panel of the D-75A. The D-45 layout is similar. WARNING: HEADPHONE JACK SUPPLIES FULL OUTPUT POWER AND MAY DAMAGE HEADPHONES OR CAUSE HEARING DAMAGE. Figure 3.
D Series Power Amplifiers 3 Operation 3.3 Indicators Your amplifier has five front panel indicators. First, a power indicator behind the front panel becomes visible when the unit is turned on and has power. A signal indicator for each channel (Figure 3.2 ) flashes when there is output from the amplifier. The IOC (Input/Output Comparator) indicators work like sensitive distortion meters and flash when the amplifier causes any distortion of 0.05% or more.
D Series Power Amplifiers 4 Advanced Features and Options NOTE: For detailed information about these Crown amplifier features, please consult the Crown Amplifier Application Guide, available on the Crown website at www.crownaudio.com. 4.1 Protection Your amplifier is protected against all common hazards that plague high-power amplifiers, including shorted, open or mismatched loads; overloaded power supplies, chain destruction phenomena, input overload and high-frequency blowups.
D Series Power Amplifiers 5 Troubleshooting CONDITION: Power indicator is off. • The amplifier has lost AC power. CONDITION: No sound, even though the amp has power. Power LED is on and the amp is receiving an input signal. Signal indicator is flashing. • The amplifier’s Power switch is off. POSSIBLE REASON: • The amplifier is not plugged into the power receptacle. • Speakers not connected. • The amplifier output level is so high that the power supply fuse has blown.
D Series Power Amplifiers 6 Specifications Minimum Guaranteed Power D-45 D-75A 120V/60 Hz Units, Dual mode, per channel, both channels driven 1 kHz with 0.1% THD 4 ohms 8 ohms 16 ohms 35W 25W 20W 55W 40W 25W 70W 50W 110W 80W 120V/60 Hz Units, Bridge mono mode 1 kHz with 0.1% THD 8 ohms 16 ohms Performance Frequency Response (at 1 watt, 20Hz - 20 kHz) Phase Response (at 1 watt, 20Hz - 20 kHz) Signal to Noise Ratio (below rated power, 20 Hz to 20 kHz) D D-455 D- D-75AA ± 0.1 dB ± 0.
D Series Power Amplifiers 6 Specifications D-45 FTC Continuous Average Power at 0.1% THD (See note 1) Configuration and Load (ohms) 20Hz-20kHz Dual (both channels driven) Bridge-Mono (balanced output) 1 kHz 4 Max. Average Power at 0.1% THD (See note 2) Single-Cycle Tone Burst Watts at < 0.05% THD (See note 3) 40 mS Tone Burst Watts at < 0.
D Series Power Amplifiers 7 Service Crown amplifiers are quality units that rarely require servicing. Before returning your unit for servicing, please contact Crown Technical Support to verify the need for servicing. This unit has very sophisticated circuitry which should only be serviced by a fully trained technician. This is one reason why each unit bears the following label: CAUTION: To prevent electric shock, do not remove covers. No user serviceable parts inside.
D Series Power Amplifiers 8 Warranty 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 product is free of defects in materials and workmanship.
D Series Power Amplifiers 8 Warranty 3 AR YE WORLDWIDE EXCEPT USA & CANADA SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A.
D Series Power Amplifiers NOTES page 20 Operation Manual
D Series Power Amplifiers Crown Factory Service Information Shipping Address: Crown Factory Service, 1718 W. Mishawaka Rd.
D Series Power Amplifiers THIS PAGE INTENTIONALLY LEFT BLANK page 22 Operation Manual
D Series Power Amplifiers THIS PAGE INTENTIONALLY LEFT BLANK Operation Manual page 23