
Do you have a question about the Harman Infinity REFERENCE 4555A and is the answer not in the manual?
Basic guidelines for product safety, installation, and operation.
Precautions regarding plugs, cords, and electrical hazards.
FCC, IC, and antenna grounding compliance information.
Warnings for electric shock, laser, and battery hazards.
Techniques to prevent static damage to sensitive electronic components.
General advice on following safety precautions and component replacement.
Procedure for checking leakage current for electrical safety.
Key features of the Infinity Reference amplifiers, including connectivity and sonic solutions.
Detailed technical data for REF-551a, REF-704a, and REF-4555a models.
List of accessories and items provided with the amplifier.
Overview of the amplifier's internal architecture and signal flow.
Schematics for power delivery and protection systems.
Detailed schematics of power output transistors and related circuitry.
Schematics for signal input and pre-amplification stages.
Circuit diagrams for handling the ADAS input signal.
Schematics for crossover and equalization pre-amp stages.
Detailed diagrams of the front/rear amplifier output stages.
Schematics for subwoofer input, volume, and phase control.
Circuit diagram of the subwoofer amplifier output.
Component placement on the main PCB's top side.
Component placement on the pre-amp PCB's bottom side.
Component placement on the pre-amp PCB's top side.
Exploded view showing part breakdown and assembly.
Visual guide to product packaging and spare parts.
Comprehensive list of part numbers and descriptions for replacement.












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