Micro-Tech Series Operation Manual Micro-Tech 600, 1200, & 2400 Micro-Tech 601, 1201, & 2401 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.
Micro-Tech 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.
Micro-Tech Series Power Amplifiers Table of Contents Important Safety Instructions ........................... 2 5 Advanced Features and Options ...................................... 13 1 Welcome .......................................................... 4 5.1 Protection Systems ........................................................ 13 1.1 Features ...................................................... 4 5.1.1 Odep ..................................................................... 13 1.
Micro-Tech Series Power Amplifiers 1 Welcome Crown's Micro-Tech 600, 1200 and 2400 are the original industry standards for touring amplifiers. Micro-Tech amplifiers are known around the world as the benchmark for highdensity, ultra-pure power in a compact, lightweight package. In addition, each model gives you Crown's legendary ODEP® protection to keep the show going long after other amplifiers would fail. Models MT-601, 1201 and 2401(for Japan) are identical to corresponding models MT-600, 1200 and 2400.
Micro-Tech Series Power Amplifiers 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 YOU WILL NEED (not supplied): • Input wiring cables • Output wiring cables Rack for mounting amplifier (or a stable surface for stacking) Use a standard 19-inch (48.3 cm) equipment rack. See Figure 3.
Micro-Tech Series Power Amplifiers 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. Depending upon which amplifier input you choose, you should use either 3-pin male XLR connectors, TRS phone connectors, or terminal forks at the amplifier inputs. Unbalanced lines may also be used but may result in noise over long cable runs.
Micro-Tech Series Power Amplifiers 3 Setup 3.5 Choose Output Wire and Connectors Crown recommends using pre-built or professionally wired, high-quality, two-conductor, heavy gauge speaker wire and connectors. Use banana plugs, spade lugs or bare wire for your output connectors (Figure 3.5). To prevent short circuits, wrap or otherwise insulate exposed loudspeaker cable connectors. Using the guidelines below, select the appropriate size of wire based on the distance from amplifier to speaker.
Micro-Tech Series Power Amplifiers 3 Setup 3.6 Wire Your System 3.6.1 Stereo Mode Typical input and output wiring is shown in Figure 3.6. Turn off the amplifier, and set the Stereo/Mono mode switch on the back to Stereo. INPUTS: Connect input wiring for both channels. OUTPUTS: Maintain proper polarity (+/-) on output connectors. 3.6.3 Parallel-Mono Mode Typical input and output wiring is shown in Figure 3.6. Turn off the amplifier, and set the Stereo/Mono mode switch on the back to Parallel Mono.
Micro-Tech Series Power Amplifiers 3 Setup 3.7 Set Input Sensitivity The three-position input sensitivity switch is located inside the amplifier behind the MT-XLR module (Figure 4.2 letter “I”). The switch is set at the factory to a sensitivity of 0.775 volt for standard 1 kHz power into 8 ohms. (Factory setting for International versions is 1.4 V.) If desired, the sensitivity can be switched to 1.4 volts for standard 1 kHz power into 8 ohms, or a voltage gain of 26 dB.
Micro-Tech Series Power Amplifiers 4 Operation 4.1 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 and Stereo/Mono-switch setting. Improper wiring can result in serious operating difficulties.
Micro-Tech Series Power Amplifiers 4 Operation 4.2 Controls, Indicators and Connectors 4.2.1 Front Panel Facilities A. Filter Grille Supports and protects the dust filter (B). To clean the dust filter, detach the grille by removing the three screws that hold it in place. B. Dust Filter Removes large particles from the air drawn by the cooling fan. Check the filter regularly to prevent clogging. The filter can be cleaned by soaking in a mild detergent (e.g. dishwashing liquid). D. Enable Indicator C.
Micro-Tech Series Power Amplifiers 4 Operation balanced (tip, ring and sleeve) or unbalanced (tip and sleeve) lines (refer to Figure 3.5). Balanced XLR ijnputs for each channel are provided with the MT-XLR module. Barrier-block input connectors are available with the MT-BB accessory (see Section 5.2.2). Caution: Do not use the Channel-2 input in either mono mode. I. MT-XLR Module 4.2.2 Rear Panel Facilities This module provides two balanced XLR inputs.
Micro-Tech Series Power Amplifiers 5 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. 5.1 Protection Systems Your Crown amplifier provides extensive protection and diagnostic capabilities, including ODEP, ultrasonic/RF protection, drive protection, and power supply fuses or breakers. 5.1.
Micro-Tech Series Power Amplifiers 5 Advanced Features and Options 5.2 Accessories 5.2.1 Cooling Fan Options Every Micro-Tech amplifier has a built-in highvelocity fan that provides optimum cooling. Two optional replacement fan blades are available for special cooling requirments. Crown part C 6594-3 is a quieter, low-velocity fan blade that in many cases can provide adequate cooling.
Micro-Tech Series Power Amplifiers 6 Principles of Operation 6.1 Overview Micro-Tech amplifiers incorporate several technological advancements including real-time computer simulation of output transistor stress, low-stress output stages and an advanced heat sink embodiment. Custom circuitry is incorporated to limit temperature and current to safe levels making it highly reliable and tolerant of faults. Unlike many lesser amplifiers, it can operate at its voltage and current limits without self-destructing.
Micro-Tech Series Power Amplifiers 6 Principles of Operation 6.2.1 Stereo Operation For simplicity, the discussion of Stereo operation will refer to one channel only. Mono operation will be discussed later. For specific circuit references, see the block diagram in Figure 6.1. The signal at the ¼-inch phone jack input passes directly to the balanced gain stage (U104-A and U104-B). The balanced gain stage causes balanced to single-ended conversion using a difference amplifier.
Micro-Tech Series Power Amplifiers 6 Principles of Operation To further protect the output stages, the patented ODEP circuitry is used. It produces an analog output proportional to the always changing die temperature of the output transistor. This output controls the translator stage previously mentioned, removing any further drive that may exceed the safe operating area of the output stage.
Micro-Tech Series Power Amplifiers 7 Troubleshooting CONDITION: Normal operation. The Enable (Power) LED is on, and the ODEP LEDs are on or flickering. ODEP LEDs on indicates a high energy reserve. An ODEP LED flickering means that the energy reserve for the affected channel is dipping. OTHER POSSIBLE CONDITIONS TO BE AWARE OF: CONDITION: Normal LED display but distorted sound. POSSIBLE REASON: • Load is wired incorrectly or Stereo/Mono mode switch is set incorrectly. Check both.
Micro-Tech Series Power Amplifiers 8 Specifications Minimum Guaranteed Power MT-600 MT-1200 MT-2400 400 W 325 W 220 W 675 W 480 W 310 W 1,050 W 800 W 520 W 750 W 655 W 450 W 1,300 970 W 620 W 2,070 W 1,585 W 1,035 W 700 W 665 W 450 W 1,300 W 965 W 620 W 2,080 W 1, 605 W 1, 035 W Performance MT-600 MT-1200 MT-2400 Frequency Response (at 1 watt, 20Hz - 20 kHz) ± 0.1 dB ± 0.1 dB ± 0.1 dB ±10° ±10° ±10° >100 dB >105 dB >100 dB >105 dB >100 dB >105 dB 0.1% 0.1% 0.1% < 0.05% < 0.
Micro-Tech Series Power Amplifiers 8 Specifications Performance Voltage Gain (at maximum level setting, ± 0.5 dB) 26dB sensitivitiy 0.775V sensitivity 1.4V sensitivity Required AC Mains Power Draw at Idle MT-600 MT-1200 MT-2400 26 dB 35.0 dB 30.0 dB 26 dB 36.0 dB 31.0 dB 26 dB 38.0 dB 33.0 dB 50/60 Hz, 100 - 240 VAC (±10%) 50/60 Hz, 100 - 240 VAC (±10%) 50/60 Hz, 100 - 240 VAC (±10%) 90 watts 90 watts 90 watts Flow-through ventilation from front to side panels.
Micro-Tech Series Power Amplifiers 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 Micro-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. The following assumptions or approximations were made: Here are the equations used to calculate the data presented in Figures 9.1, 9.
Micro-Tech Series Power Amplifiers 9 AC Power Draw and Thermal Dissipation Figure 9.1 Micro-Tech 600 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Figure 9.2 Micro-Tech 1200 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Figure 9.
Micro-Tech Series Power Amplifiers 10 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.
Micro-Tech Series Power Amplifiers 11 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.
Micro-Tech Series Power Amplifiers 11 Warranty 3 AR YE WORLDWIDE EXCEPT USA & CANADA SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A.
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Micro-Tech Series Power Amplifiers Crown Factory Service Information Shipping Address: Crown Factory Service, 1718 W. Mishawaka Rd.