Macro-Tech Series MA-24X6 Operation Manual MA-36X12 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.
Macro-Tech MA-24X6 & 36X12 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.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers DECLARATION of CONFORMITY Crown International, Inc. TCF Technical Certificate No: P4300CRI1.IWS Technical Construction File Route Issued By: Crown International, Inc. 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers Table of Contents Important Safety Instructions .....................................................................................2 4.1.4 Transformer Thermal Protection ............................................... 15 Declaration of Conformity ..........................................................................................3 4.1.5 Circuit Breakers ........................................................................ 15 1 Welcome .............
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 1 Welcome Congratulations on your purchase of a MacroTech ® dual level professional power amplifier. Your amplifier has a separate high-power and medium-power channel, making it ideal for biamplified systems. The Macro-Tech 24x6 combines one channel of a Macro-Tech 2400 with one channel of a Macro-Tech 600. The Macro-Tech 36x12 combines one channel of a Macro-Tech 3600VZ with one channel of a Macro-Tech 1200.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 2 Setup 2.2 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). 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.
Macro-Tech MA-24X6 & 36X12 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. Balanced Line Unbalanced Line NOTE: Custom wiring should only be performed by qualified personnel. Figure 2.3 Balanced Input Connector Wiring Operation Manual Figure 2.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 2 Setup 2.5 Choose Output Wire and Connectors Crown recommends using pre-built or professionally wired, high-quality, two-conductor, heavy gauge speaker wire and connectors. You may use banana connectors, terminal forks or bare wire for your output connectors (see Figure 2.5). To prevent the possibility of short-circuits, wrap or otherwise insulate exposed loudspeaker cable connectors.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 2 Setup 2.6 Wire Your System This section describes the most common way to install the Macro-Tech 24X6 and 36X12. Each model is designed for biamplified systems and includes both a high-power and a mediumpower channel. Because each channel produces a different power level, the Macro-Tech 24x6 and 36x12 are dedicated to two-channel operation. They do NOT offer mono operation.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 2 Setup 2.7 Connect to AC Mains Connect the AC power cordset of your amplifier to the AC mains power source (power outlet). 2.8 Startup Procedure Use the following procedure when first turning on your amplifier: NOTE: 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. 1. Turn down the level of your audio source. Amplifiers don’t create energy.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 3 Operation 3.1 Precautions Your Macro-Tech Series 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.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 3 Operation 3.2 Front Panel Controls and Indicators A. Dust Filter Removes large particles from the air at the air intake. The filter elements can be easily removed for cleaning by gently pulling them away from the front panel. B. Level Control Rotary detented level control, one per channel. C. Signal/IOC Indicator Green LED, one per channel. Dual-purpose indicator illuminates to indicate the presence of input signals; flashes brightly with a 0.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 3 Operation 3.3 Back Panel Controls and Connectors G. Power Cord 120 VAC, 60 Hz units have a 20-amp (12 AWG) line cord with a grounded NEMA 5-15P plug. See Section 8 for AC power usage. H. Reset Switches The reset switches are used to reset the breakers that safeguard each power supply from overload. I. PIP Module The standard P.I.P.-FX is included with your amplifier. It provides female XLR input connectors.
Macro-Tech MA-24X6 & 36X12 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 Systems Your Crown amplifier provides extensive protection and diagnostic capabilities, including ODEP, IOC., “standby” mode, fuses (or breakers), and special thermal protection for the unit’s transformers. 4.1.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 4 Advanced Features and Options 4.1.4 Transformer Thermal Protection All Macro-Tech amplifiers have transformer thermal protection. It protects the power supplies from damage under the rare conditions of transformer temperatures rising too high. A thermal switch embedded in each transformer removes power to the channel if there is excessive heat. The switch automatically resets when the transformer cools to a safe temperature.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 4 Advanced Features and Options 4.3 Options 4.3.1 PIP 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 error-driven compressor/limiters to IQ control. Visit the Crown website at www.crownaudio.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 5 Troubleshooting 5.1 Indicators The front panel has several helpful indicator LEDs (Figure 5.1). operation even when conditions are severe. (For a more detailed description of ODEP, see Section 4.1.1). The amber Enable indicator is provided to show 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 supplies.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 5 Troubleshooting Figure 5.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 6 Theory of Operation Each channel is powered by its own power transformer, T100 or T200. Both channels share TF-1, a low voltage transformer. The secondary outputs of each transformer are fullwave rectified by heavy duty bridge rectifiers and are filtered by large computer grade capacitors. A thermal switch embedded in each transformer protects them from overheating. The low voltage transformer TF-1 uses a separate fan motor winding.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 6 Theory of Operation +Vcc +Vcc TRANSLATOR A (ODEP) B (ODEP) LVA NPN HI OUTPUT STAGE NPN LOW OUTPUT STAGE +Vcc E XLR ODEP P.I.P. BALANCED INPUTS BALANCE INPUT STAGE VARIABLE GAIN STAGE A B C D OUTPUT CURRENT LIMIT BIAS ERROR AMP BIAS + PNP HI OUTPUT STAGE 1/4" PHONE TRANSLATOR PNP LOW OUTPUT STAGE BRIDGE BALANCE –Vcc LVA DISPLAY –Vcc C (ODEP) D (ODEP) –Vcc ONLY ONE CHANNEL SHOWN Figure 6.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 7 Specifications Minimum Guaranteed Power 120VAC, 60 Hz Units Macro-Tech 24X6 Macro-Tech 36X12 International Units Macro-Tech 24X6 Macro-Tech 36X12 Power in watts per channel,1 kHz, 0.1% THD Channel 1 2 ohms per ch. 4 ohms per ch. 8 ohms per ch. 1050W 800W 520W 1800W 1565W 1120W 875W 745W 510W 1460W 1300W 965W Channel 2 2 ohms per ch. 4 ohms per ch. 8 ohms per ch.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 7 Specifications Performance (continued) Output Impedance Load Impedance (Note: Safe with all types of loads) Macro-Tech 24X6 Macro-Tech 36X12 See Figure 7.3 See Figure 7.3 2, 4, 8, 16 ohms 2, 4, 8, 16 ohms Voltage Gain (8-ohm load, rated output at 1 kHz, maximum level setting) 83:1 ±6% or 38 dB ±0.5 dB 54:1 ±6% or 35 dB ±0.5 dB 20:1 ±6% or 26 dB ±0.5 dB 20:1 ±6% or 26 dB ±0.5 dB (Ch. 1, .775V sensitivity) (Ch. 2, .775V sensitivity) (Ch.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 7 Specifications +2 Figure 7.1 Typical Frequency Response Figure 7.4 Typical Phase Response +1 0 –1 –2 8 ohm 4 ohm –3 2 ohm 1 watt dB +45˚ –4 –5 0˚ –6 –7 10 100 1K 10 K 100 K –45˚ FREQUENCY (Hz) Figure 7.2 Typical Damping Factor 1400 100 1200 1K 10 K 20 K FREQUENCY (Hz) 1000 800 600 400 8 ohm 200 100 Figure 7.5 Typical Crosstalk 0 100 20 1K 10 K 20 K FREQUENCY (Hz) Figure 7.3 Typical Output Impedance 504.0 126.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 8 AC Power Draw and Thermal Dissipation This section provides detailed information about the amount of power and current drawn from the Macro-Tech 24X6 and 36X12 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.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 8 AC Power Draw and Thermal Dissipation Figure 8.1 Macro-Tech 24X6 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles Figure 8.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 9 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.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 10 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.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers 10 Warranty 3 AR YE WORLDWIDE EXCEPT USA & CANADA SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A.
Macro-Tech MA-24X6 & 36X12 Power Amplifiers Crown Factory Service Information Shipping Address: Crown Factory Service, 1718 W. Mishawaka Rd.
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Macro-Tech MA-24X6 & 36X12 Power Amplifiers page 32 Operation Manual
