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General| Frequency Response | 20 Hz - 20 kHz |
|---|---|
| Total Harmonic Distortion (THD) | <0.5% |
| Input Sensitivity | 1.4V |
| Signal to Noise Ratio | > 100 dB |
| Input Impedance | 20 kOhm balanced, 10 kOhm unbalanced |
| Cooling | Forced air |
| Voltage | 120V |
Introduces the Crown Macro-Tech Series audio amplifiers, models MA-24X6 and MA-36X12, and the purpose of the operation manual.
Critical safety warnings and guidelines for operating the amplifier to prevent electric shock, damage, and ensure user safety.
Warning about potential interference with sensitive audio equipment due to the amplifier's magnetic field.
Explanation of the warning symbols used in the manual to alert users to potential hazards or important information.
Information regarding the device's compliance with FCC rules, including conditions for operation and measures to mitigate interference.
Lists the specific Electromagnetic Compatibility (EMC) standards the product adheres to for professional audio equipment.
Details the safety standard compliance for audio video and similar electronic apparatus as required by directives.
Highlights key features like Grounded Bridge design, ODEP, IOC, PIP compatibility, and high damping factor for enhanced performance.
Provides instructions on how to use the manual effectively, emphasizing safety, registration, and seeking further information.
Guides users on inspecting the amplifier for shipping damage, saving packaging, and listing necessary setup items.
Provides installation guidelines for racks or stacking, ensuring proper ventilation and cooling to prevent overheating.
Explains balanced and unbalanced input wiring with connector pin assignments, advising professional help for custom wiring.
Recommends high-quality wire and connectors, provides wire size guidelines based on distance, and warns against using shielded cable.
Details common system wiring for biamplified setups, emphasizing two-channel operation and correct loudspeaker polarity.
Instructions for connecting the amplifier to the AC power source, emphasizing the importance of the ground prong and proper voltage.
Step-by-step procedure for safely turning on the amplifier, including setting audio source and amplifier levels.
Outlines essential precautions for optimal performance and safety, including proper wiring, signal source selection, and avoiding signal clipping.
Details the function of front panel elements like Dust Filter, Level Control, Signal/IOC Indicator, ODEP Indicator, Enable Indicator, and Enable Switch.
Explains back panel components including Power Cord, Reset Switches, PIP Module, Input Sensitivity Switch, Balanced Phone Jack Inputs, Ground Lift Switch, XLR Inputs, and Output Jacks.
Overview of the amplifier's protection and diagnostic capabilities, including ODEP, IOC, standby mode, fuses, and thermal protection.
Explanation of Crown's ODEP technology for simulating output transistor conditions to prevent damage and ensure continuous operation.
Description of the IOC circuit that compares input and output signals to detect distortion, input overload, or muting/shutdown conditions.
Details how standby mode protects the amplifier and loads by removing power from high-voltage supplies due to subsonic frequencies, DC, or fault conditions.
Explains the thermal protection system for transformers, which removes power if temperatures rise too high, resetting automatically when cooled.
Describes the circuit breakers protecting power supplies, intended to shut down the amplifier only in cases of catastrophic failure or extreme overload.
Introduces the amplifier's internal circuit designs, focusing on Grounded Bridge topology and Variable Impedance (VZ) technology.
Explains Crown's unique Grounded Bridge topology, delivering large voltage swings without stressing output transistors for higher efficiency and reliability.
Details Crown's patented VZ technology for dynamic power supply adaptation, providing optimal power matching to various loads with low distortion.
Explains the function of versatile PIP modules that plug into the amplifier to add features like compressor/limiters, IQ control, and DSP.
Describes the adapter enabling the amplifier to accept the IQ-PIP-USP2 module for remote control, monitoring, and digital signal processing capabilities.
Details the location and function of the input sensitivity switch, allowing adjustment of input voltage sensitivity for different gain settings.
Explains the function of the rear-panel Input Ground Lift switch, which isolates phone jack signal grounds from AC ground to prevent hum from ground loops.
Explains the front panel indicator LEDs (Enable, ODEP, Signal/IOC) and their meanings related to amplifier status and potential issues.
Explains how power is supplied to each channel, signal processing through gain stages, and protection mechanisms affecting the signal path.
Details how protection mechanisms like current limiters, ODEP, and DC protection safeguard the amplifier under various adverse conditions.
Lists the minimum guaranteed power output in watts per channel at 1 kHz with 0.1% THD for different load impedances.
Details performance metrics like frequency response, phase response, signal-to-noise ratio, and distortion levels under specified conditions.
Specifies the input impedance of the amplifier and the output impedance for various load conditions.
States safe load impedance ranges and provides voltage gain figures for different sensitivity settings and channels.
Lists available AC mains voltage options and specifies the amplifier's power consumption when idle.
Details construction aspects like cooling, rack-mount standards, physical dimensions, and weight for handling and installation.
Presents graphical data illustrating frequency response, damping factor, output impedance, phase response, and crosstalk characteristics of the amplifiers.
Explains the equations used to calculate AC mains power draw in watts and current draw in amperes, considering power factor and duty cycle.
Details the equations for calculating thermal dissipation in btu/hr and kcal, factoring in amplifier efficiency and quiescent power.
Presents tables showing power draw, current draw, and thermal dissipation for various duty cycles and load impedances for both Macro-Tech 24x6 and 36x12 models.
Outlines how to obtain service worldwide through authorized centers, requiring proof of purchase and original packaging.
Explains service options in the US and Canada, including using authorized service centers or returning the unit to the factory.
Details procedures for factory service, including obtaining return authorization, filling out forms, and proper shipping instructions to prevent damage.
Provides a summary of the warranty coverage, duration, and lists items and conditions excluded from the warranty.
Instructs users on how to obtain warranty service, including notification requirements, shipping, and repair timelines.
Covers legal aspects like disclaimers for damages, warranty alterations, design changes, and purchaser's legal remedies.
