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MA Series Power Amplifiers Important Safety Instructions 1) Read these instructions. TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR BOTTOM COVERS. NO USER SERVICE- 2) Keep these instructions. ABLE PARTS INSIDE. REFER SERVICING TO 3) Heed all warnings. QUALIFIED SERVICE PERSONNEL. 4) Follow all instructions. 5) Do not use this apparatus near water. À PRÉVENIR LE CHOC ÉLECTRIQUE N’ENLEVEZ 6) Clean only with a dry cloth. PAS LES COUVERCLES. IL N’Y A PAS DES PAR- 7) Do not block any ventilation
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MA Series Power Amplifiers Crown International, Inc. TCF Technical Certificate No: P4300CRI1.IWS DECLARATION of CONFORMITY Technical Construction File Route Sue Whitfield Issued By: Crown International, Inc. 574-294-8289 1718 W. Mishawaka Road swhitfield@crownintl.com Elkhart, Indiana 46517 U.S.A. Competent Body’s Name and Address: European Representative's Name and Address: Technology International (Europe) Limited Nick Owen 41-42 Shriv
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MA Series Power Amplifiers 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
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MA Series Power Amplifiers • Patented ODEP (Output Device Emulatioin 1 Welcome 2 How to Use This *1 kHz **20 Hz–20 kHz Protection) circuitry compensates for Power Power MA-602 overheating and overload to keep the 2 ohm Dual (per ch.) 400W 335W Manual Congratulations on purchasing one of the amplifier working when others would fail. ® ® 4 ohm Dual (per ch.) 325W 300W renowned Crown Macro-Tech power This manual provides you with the necessary 8 ohm Dual (per ch.) 225W 210W amplifiers. They
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MA Series Power Amplifiers 4 Operation ® 4.2 Front Panel Controls and C. Signal/IOC Indicators They dim proportionally as energy reserves Indicators decrease. In the rare event that energy reserves These green multifunction indicators show sig- are depleted, the indicators turn off and ODEP The diagram below shows the controls and nal presence and distortion for each channel. proportionally limits output drive so the ampli- indicators on the front panel of the Macro-Tech As signal presence
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MA Series Power Amplifiers 4 Operation 4.3 Back Panel Controls, Indicators and Con- J. PIP Module L. Balanced XLR Inputs nectors The standard PIP2-FXQ is included with your amplifier. It The factory-installed PIP2-FXQ provides a three-pin G. Power Cord provides female three-pin XLR input connectors. A vari- female XLR connector for balanced input to each chan- ety of other PIP modules can be used in place of the nel. The XLR inputs are connected in parallel with the The power cord has an appr
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MA Series Power Amplifiers 4 Operation 4.4 Indicators The ODEP indicator for the affected channel will Under conditions where one of the amplifier's turn off if a high-voltage power supply is put in high-voltage power supplies is temporarily put The amber Enable indicator is provided to "standby" mode, a high-voltage power supply in standby mode, the Signal/IOC indicators will show that the amplifier has been turned on (or fuse (or breaker) blows, or a transformer acti- stay on with full b
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MA Series Power Amplifiers 5 Advanced Features and Options 5.1 Protection Systems An IQ-PIP module may also temporarily place 5.1.2 Standby Mode Macro-Tech amplifiers provide extensive pro- the amplfier in standby mode, typically for An important part of a Macro-Tech amplifier's power conservation. The standby mode status tection and diagnostics capabilities. Protection protection systems is standby mode. Standby can be triggered either manually or through systems include ODEP, "standby
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MA Series Power Amplifiers 5 Advanced Features and Options 5.1.4 Fuses and Circuit Breakers Here are some of their many features: • Full protection against shorted outputs, mismatched loads, input/output DC, The power supplies of the Macro-Tech 602 and • Crown's Grounded Bridge design deliv- general overheating, high-frequency 1202 are protected by fuses. The power sup- ers large voltage swings without using overloads and internal faults. plies of the Macro-Tech 2402 are protected by eas
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MA Series Power Amplifiers 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 error- driven compressor/limiters to IQ control. Your amplifier is a PIP2 amplifier, which means it can take advantage of the man
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MA Series Power Amplifiers 6 Troubleshooting Indicator Status Amplifier Condition The table in Figure 6.1 shows the possible states for the ODEP and Signal/IOC indica- There is no power to the amplifier and all indicators are off, including the Enable light. tors. It also describes the conditions that ODEP OFF Possible reasons: (1) The amplifier’s Enable switch is off. (2) The amplifier is not plugged into the power may be associated with the different indica- receptacle. (3) The AC circuit b
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MA Series Power Amplifiers 7 Theory of Operation 7.1 Overview The devices connected to the load are referred A thermal switch embedded in each transformer protects it from overheating. to as "high-side NPN and PNP" and the devices Your Macro-Tech amplifier incorporates several connected to ground are referred to as "low- advanced technological features including real- The low-voltage transformer output is rectified side NPN and PNP." Positive current is deliv- time computer simulation of out
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MA Series Power Amplifiers 7 Theory of Operation The bridge-balanced circuit (U104-B) receives a To further protect the output stages, the patented nal applied to the Channel 1 input jack and the load output stage of Channel 2. The Channel 2 balanced input, error amp, translators and LVAs are discon- signal from the output of the amplifier, and differ- ODEP circuitry is used. It produces an analog out- connected across the red (+) back panel 5-way ences it with the signal at the Vcc supply. Th
