Macro-Tech 2402 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.
MA 2402 Power Amplifier Important Safety Instructions Wichtige Sicherheitsinstruktionen Importantes Instructions de Sécurité Instrucciones de Seguridad Importantes 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 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.
MA 2402 Power Amplifier DECLARATION of CONFORMITY Crown Audio, Inc. TCF Technical Certificate No: P4300CRI1.IWS Technical Construction File Route Issued By: Crown Audio, Inc. 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A.
MA 2402 Power Amplifier Table of Contents Important Safety Instructions .......................... 2 5.1.2 Standby Mode ..........................................14 Declaration of Conformity ................................ 3 5.1.3 Transformer Thermal Protection ...............14 1 Welcome ................................................... 5 5.1.4 Fuses and Circuit Breakers.......................15 1.1 Features .............................................. 5 5.2 Advanced Features .................
MA 2402 Power Amplifier MA-2402 *1 kHz **20 Hz–20 kHz Power Power 2 ohm Dual (per ch.) 1,050W 850W 800W 750W 520W 505W 4 ohm Dual (per ch.) 8 ohm Dual (per ch.) 4 ohm Bridge-Mono 2,070W 1,670W 8 ohm Bridge-Mono 1,585W 1,485W *1 kHz Power: refers to maximum average power in watts at 1 kHz with 0.1% THD. **20 Hz–20 kHz Power: refers to maximum average power in watts from 20 Hz to 20 kHz with 0.1% THD. 1 Welcome Congratulations on purchasing the renowned Crown® Macro-Tech® 2402 power amplifier.
MA 2402 Power Amplifier 3 Setup 3.2 Install Your Amplifier CAUTION: Before you begin, make sure your amplifier is disconnected from the power source, with power switch in the “off” position and all level controls turned completely down (counterclockwise). 3.1 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.
MA 2402 Power Amplifier 3 Setup 3.4 Choose Input Wire and Connectors Crown recommends using pre-built or professionally wired, balanced line (two-conductor plus shield), 22-24 gauge cables and connectors.The factory-installed PIP2-FXQ input module accepts 3-pin male XLR connectors or TRS phone connectors. Other PIP modules accept XLR, phone or Phoenix connectors, or bare wires. Regarding the PIP2-FXQ, Figure 3.3 shows connector pin assignments for balanced wiring, and Figure 3.
MA 2402 Power Amplifier 3 Setup 3.6 Wire Your System Turn down the Level controls (fully counterclockwise) and turn off the amplifier before wiring it as described below. 3.6.1 Stereo Mode See Figure 3.6. Set the back panel stereo/mono switch to Stereo. Figure 3.6 Stereo Wiring INPUTS: Connect input wiring to both channels. OUTPUTS: Maintain proper polarity (+/-) on output connectors. Connect Channel 1 positive (+) speaker load to Channel 1 positive terminal of amp; repeat for negative (-).
MA 2402 Power Amplifier 3 Setup 3.6.3 Parallel-Mono Mode See Figure 3.8. Set the back panel stereo/mono switch to Parallel-Mono. INPUTS: Connect input wiring to Channel 1 only. OUTPUTS: Add a 14 gauge (or larger) jumper between the red(+) Channel 1 and Channel 2 binding posts. Connect the speaker positive (+) lead to the Channel 1 red (+) terminal. Connect the speaker negative (-) lead to the Channel 1 black (-) terminal.
MA 2402 Power Amplifier 3 Setup 3.7 Set Input Sensitivity The input sensitivity switch inside the amplifier is set to 0.775 volt RMS at the factory. (Factory setting for international models is 1.4V). It can be changed to 1.4 volts or a voltage gain of 26 dB. The 26 dB gain setting is equivalent to a sensitivity of 3.1 volts for the Macro-Tech 2402. To change the input sensitivity: 1. Turn off and unplug the amplifier from the AC source. 2. Remove the input module on the back panel. 3.
MA 2402 Power Amplifier 4 Operation 4.2 Front Panel Controls and Indicators The diagram below shows the controls and indicators on the front panel of the Macro-Tech 2402. A. Dust Filters The dust filters remove large particles from the air drawn in by the cooling fan. Check the filters regularly to prevent clogging. The filter elements can be easily removed for cleaning by gently pulling them away from the front panel. B.
MA 2402 Power Amplifier 4 Operation 4.3 Back Panel Controls, Indicators and Connectors G. Power Cord The power cord has an appropriate plug for the required voltage. 120 VAC, 60 Hz North American Macro-Tech 2402s have 12 AWG line cords and NEMA 5-20P plugs. International units are shipped with an appropriate line cord and plug. See Section 7 for AC power usage. H. Stereo/Mono Switch The three operating modes of a Macro-Tech amplifier are controlled by this switch.
MA 2402 Power Amplifier 4 Operation 4.4 Indicators The amber Enable indicator is provided to show that the amplifier has been turned on (or enabled), and that its low-voltage power supply and forced-air cooling system are working. It does not indicate the status of the high-voltage power supplies. For example, the Enable indicator will remain lit during unusual conditions that would cause the amplifier's protection systems to put a high-voltage power supply in "standby" mode (see Section 5.1.2).
MA 2402 Power Amplifier 5 Advanced Features and Options 5.1 Protection Systems Macro-Tech amplifiers provide extensive protection and diagnostics capabilities. Protection systems include ODEP, "standby" mode, fuses (or breakers), and special thermal protection for the unit's transformers. 5.1.1 ODEP Crown invented ODEP to solve two long-standing problems in amplifier design: to prevent amplifier shutdown during demanding operation and to increase the efficiency of the output circuitry.
MA 2402 Power Amplifier 5 Advanced Features and Options Full protection against shorted outputs, mismatched loads, input/output DC, general overheating, high-frequency overloads and internal faults. • Dedicated power supply transformers isolate channels in Stereo mode for superb crosstalk characteristics and reliability—each channel is virtually a separate amplifier. • Balanced inputs with internal three-position sensitivity switch and adjustable front-panel level controls.
MA 2402 Power Amplifier 5 Advanced Features and Options 5.3 Options 5.3.1 PIP and PIP2 Modules Versatile PIP (Programmable Input Processor) modules provide flexible expansion features that can be added to customize the amplifier. PIP modules plug into the connector inside the back panel of the amplifier. PIP modules are available with a features ranging from errordriven compressor/limiters to remote control and monitoring via IQwic or System Architect.
MA 2402 Power Amplifier 5 Advanced Features and Options 5.3.2 Cooling Fan Options Every Macro-Tech amplifier has a built-in highvelocity fan that provides optimum cooling. Two optional replacement fan blades are available for special cooling requirements. Crown part C 6594-3 is a quieter, low-velocity fan blade that in many cases can provide adequate cooling.
MA 2402 Power Amplifier 6 Troubleshooting Indicator Status The table in Figure 6.1 shows the possible states for the ODEP and Signal/IOC indicators. It also describes the conditions that may be associated with the different indicator states. The Enable indicator will be off with the first indicator state, "There is no power to the amplifier." All other conditions in the table will occur with the Enable indicator turned on.
MA 2402 Power Amplifier 7 Theory of Operation 7.1 Overview Your Macro-Tech amplifier incorporates several advanced technological features including realtime computer simulation of output transistor stress, low-stress output stages, an advanced heat sink embodiment and the PIP2 (Programmable Input Processor) expansion system. Custom circuitry is incorporated to limit temperature and current to safe levels, making it highly reliable and tolerant of faults.
MA 2402 Power Amplifier 7 Theory of Operation The bridge-balanced circuit (U104-B) receives a signal from the output of the amplifier, and differences it with the signal at the Vcc supply. The bridge-balanced circuit then develops a voltage to drive the bridge-balanced output stage. This results in the Vcc supply having exactly one half of the output voltage added to their quiescent voltage. D309, D310, D311 and a trimmer resistor set the quiescent current point for the bridge-balanced output stage.
MA 2402 Power Amplifier 8 Specifications Minimum Guaranteed Power Macro-Tech 2402 120 VAC, 60 Hz Units, Stereo mode, per channel, both channels driven 1 kHz with 0.1% THD Stereo, 2 ohms per ch. Stereo, 4 ohms per ch. Stereo, 8 ohms per ch. 1,050 W 800 W 520 W 120 VAC, 60 Hz Units, Bridge mono mode 1 kHz with 0.1% THD 4 ohms 8 ohms 16 ohms 2,070 W 1,585 W 1,035 W 120 VAC, 60 Hz Units, Parallel mono mode 1 kHz with 0.
MA 2402 Power Amplifier 8 Specifications Performance (continued) Load Impedance (Note: Safe with all types of loads) Stereo Bridge Mono Parallel Mono Voltage Gain (at maximum level setting, ± 6%) 0.775V sensitivity 1.4V sensitivity 26 dB gain Required AC Mains Power Draw at Idle Ventilation Cooling Dimensions Width Height Depth Weight Net Weight Shipping Weight page 22 Macro-Tech 2402 2-8 ohms 4-16 ohms 1-4 ohms 38 dB ± 0.5 dB 33 dB ± 0.
MA 2402 Power Amplifier 8 Specifications Maximum Power Notes: All maximum power specifications are based on 0.1% regulated AC mains and an ambient room temperature of 70°F (21°C). International units with multi-tap transformers are specified for the best-case transformer tap (normally 240 VAC, 60 Hz). Although it is an unusual condition, your amplifier can function well with AC mains voltages up to 10% over the specified line voltage.
MA 2402 Power Amplifier 8 Specifications Minimum Power Notes: All minimum power specifications are based on 0.1% regulated AC mains and an ambient room temperature of 70°F (21°C). International units with multi-tap transformers are specified for the worst-case transformer tap (normally 100 VAC, 50 Hz). The standard EIA power measurement (RS-490) is not identified here because it is identical to the FTC Continuous Average Power specification. 1.
MA 2402 Power Amplifier 9 AC Power Draw and Thermal Dissipation This section provides detailed information about the amount of power and current drawn from the AC mains by the Macro-Tech 2402 amplifier and the amount of heat produced under various conditions. The calculations presented here are intended to provide a realistic and reliable depiction of the amplifier. The following assumptions or approximations were made: • The amplifier’s available channels are loaded, and full power is being delivered.
MA 2402 Power Amplifier 9 AC Power Draw and Thermal Dissipation Figure 9.
MA 2402 Power Amplifier 10 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. 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.
MA 2402 Power Amplifier 11 Warranty UNITED STATES & CANADA SUMMARY OF WARRANTY 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.
MA 2402 Power Amplifier 11 Warranty 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.
MA 2402 Power Amplifier NOTES page 30 Operation Manual
MA 2402 Power Amplifier PRODUCT REGISTRATION Crown Audio, Inc. 1718 W. Mishawaka Rd. Elkhart, IN 46517-9439 Phone: 574-294-8000 Fax: 574-294-8329 www.crownaudio.com Online registration is also available at http://crownweb.crownintl.com/webregistration. 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.
THIS PAGE INTENTIONALLY LEFT BLANK
MA 2402 Power Amplifier Crown Factory Service Information Shipping Address: Crown Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517 PLEASE PRINT CLEARLY SRA #: __________________(If sending product to Crown factory service.
MA 2402 Power Amplifier THIS PAGE INTENTIONALLY LEFT BLANK page 34 Operation Manual
MA 2402 Power Amplifier THIS PAGE INTENTIONALLY LEFT BLANK Operation Manual page 35
