Crown Audio MA-2402 operation manual Fuses and Circuit Breakers, Advanced Features

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MA 2402 Power Amplifier

5 Advanced Features and Options

5.1.4 Fuses and Circuit Breakers

The power supplies of the Macro-Tech 2402 are protected by circuit breakers. With rated loads and output levels, the circuit breakers should only shut down the amplifier in the rare instance of a catastrophic failure. Other protec- tion systems like ODEP keep the amplifier operational under most other severe condi- tions. The circuit breakers can also shut down the amplifier in cases where extremely low- impedance loads and high output levels result in current draw that exceeds their rating. Again, this should only be possible when operating outside rated conditions, such as when the amplifier is used to drive a 1-ohm load in Ste- reo mode, or when a signal overloads the input and is clipped severely.

The Macro-Tech 2402 has a separate fuse for the low-voltage power supply and breakers for the high-voltage power supplies.

The Macro-Tech 2402 does not blow its fuse or trip its breakers unless something is wrong. In the rare event that an internal fuse blows, please refer the unit to a qualified technician. If a breaker trips, try to identify and correct the problem before resetting the breakers with the back panel Reset switches. If the problem per- sists, refer the unit to a qualified technician.

5.2 Advanced Features

The Macro-Tech 2402 uses cutting edge tech- nology to deliver the ultimate in power and value for its size, weight and price. It offers numerous advantages over conventional designs and provide benefits you can't get in amplifiers from any other manufacturer.

Here are some of its many features:

Crown's Grounded Bridge design deliv- ers large voltage swings without using easily stressed output-transistor config- urations like conventional amplifiers. The results are lower distortion and superior reliability.

Patented ODEP (Output Device Emulation Protection) circuitry compensates for overheating and overload to keep the amplifier working when others would fail.

IOC (Input/Output Comparator) circuitry immediately alerts of any distortion exceeding 0.05%, providing dynamic proof of distortion-free performance.

PIP (Programmable Input Processor) connector accepts accessories that tailor the amplifier to suit specific applications.

Enhanced PIP2 (Programmable Input Processor) connector accepts new accessory modules that further tailor the amplifier to suit specific applications, including wideband load current moni- toring.

Two mono modes (Bridge-Mono and Parallel-Mono) for driving a wide range of load impedances.

Very low harmonic and intermodulation distortion result in the best dynamic transfer function in the industry.

High damping factor provides superior control over low- frequency drivers for a clean, accurate low end.

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 reli- ability—each channel is virtually a sepa- rate amplifier.

Balanced inputs with internal three-posi- tion sensitivity switch and adjustable front-panel level controls.

Full protection from shorted, open and mismatched loads, general overheating, DC, high-frequency overloads, and full internal fault protection are provided by our latest protection scheme: “Quad- Mute.”

Efficient heat sinks and a self-contained forced-air cooling system dissipate heat quickly and evenly for extra amplifier protection and greater power output.

Extra rugged, extruded aluminum front panel with ODEP and signal presence/ IOC indicators for each channel, and an Enable indicator.

Mounts in a standard 19-inch (48.3-cm) equipment rack (units can also be stacked).

Three-Year, No-Fault, Fully Transferable warranty completely protects your investment and guarantees its specifica- tions.

Operation Manual

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Contents Some models may be exported under the name Amcron Macro-TechImportantes Instructions de Sécurité Important Safety InstructionsCompetent Body’s Name and Address Safety StandardCrown Audio, Inc TCF Technical Certificate No P4300CRI1.IWSTable of Contents How to Use This Manual FeaturesWelcome 48.3 cm SetupUnpack Your Amplifier Install Your Amplifier You may also stack amps without using a cabinetChoose Output Wire and Con- nectors Choose Input Wire ConnectorsBridge-Mono Mode Wire Your SystemStereo Mode See .6. Set the back panel stereo/mono switch to StereoParallel-Mono Mode Set Input Sensitivity Startup ProcedurePrecautions OperationEnable Indicator Front Panel Controls and IndicatorsSignal/IOC Indicators Odep IndicatorsInput Sensitivity Switch not shown Back Panel Controls, Indicators and Connec Tors Power CordStereo/Mono Switch Reset SwitchesIndicators IndicatorsOdep Advanced Features OptionsStandby Mode Protection SystemsAdvanced Features Here are some of its many featuresFuses and Circuit Breakers PIP2 Adapter Connection Options PIP and PIP2 ModulesLevel Control Shaft Lock Cooling Fan OptionsTroubleshooting Circuit Theory Please refer to the block diagram in FigureTheory of Operation OverviewParallel-Mono Operation Bridge-Mono OperationSpecifications 120 VAC, 60 Hz Units, Bridge mono mode120 VAC, 60 Hz Units, Parallel mono mode Shipping Weight Power Draw at IdleDimensions Width Weight Net WeightMacro-Tech 2402 Maximum Power Matrix Maximum Power NotesMacro-Tech 2402 Minimum Power Matrix Minimum Power NotesConstant 0.35 is inefficiency 1.00-0.65 AC Power Draw and Thermal DissipationAC Power Draw Thermal Dissipation Service United States & Canada Warranty12/01 Reason for failure, except as excluded in this WarrantyMA 2402 Power Amplifier Crown Audio, Inc FaxMishawaka Rd Elkhart This page Intentionally Left Blank ‰ Personal/Consumer ‰ Business/Corporate ModelMA 2402 Power Amplifier MA 2402 Power Amplifier