5 Advanced Features
and Options
5.1.4 Fuses and Circuit Breakers
The power supplies of the Macro-Tech 602 and 1202 are protected by fuses. The power sup- plies of the Macro-Tech 2402 are protected by circuit breakers. With rated loads and output levels, the fuses (or 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 fuses (or circuit breakers) can also shut down the amplifier in cases where extremely low-impedance loads and high out- put 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 Stereo mode, or when a signal over- loads the input and is clipped severely.
All 120 VAC, 60 Hz units and all Macro-Tech 2402s have a separate fuse for the low-voltage power supply. All units have separate fuses or breakers for the high-voltage power supplies.
Macro-Tech amplifiers do not blow their fuses or trip their breakers unless something is wrong. In the rare event that an internal fuse blows, please refer the unit to a qualified tech- nician. If a breaker in a Macro-Tech 2402 trips, try to identify and correct the problem before resetting the breakers with the back panel Reset switches. If the problem persists, refer the unit to a qualified technician.
5.2 Advanced Features
Macro-Tech amplifiers use cutting edge tech- nology to deliver the ultimate in power and value for their size, weight and price. They offer numerous advantages over conventional designs and provide benefits you can't get in amplifiers from any other manufacturer.
Here are some of their 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.
