DESIGN & CONSTRUCTION OF A 200W WIRELESS PUBLIC ADDRESS SYSTEM

ABSTRACT This project focuses on the design and construction of a 200W wireless public address (PA) system aimed at overcoming the limitations of traditional wired systems. Conventional wired PA systems often suffer restricted mobility, complex installation, and cable vulnerability, making them unsuitable for dynamic environments. To address these challenges, the system was developed using radio frequency (RF) technology to enable wireless transmission of audio signals, ensuring greater flexibility, portability, and user convenience. The system comprises key components including a microphone and preamplifier, FM transmitter and receiver modules, a 200W power amplifier, and a high-power loudspeaker. The design methodology covered circuit implementation, construction, and testing, with emphasis on audio clarity, signal stability, coverage range, and energy efficiency. Performance evaluation demonstrated the system’s ability to deliver clear sound over a range of up to 100 meters, with sufficient power output to address medium- to large-scale audiences in indoor and outdoor environments. Although the physical construction was limited by challenges in achieving stable frequency synchronization between the transmitter and receiver, the project provides a practical framework for developing cost-effective, scalable, and portable wireless PA systems. The outcomes highlight the potential of modern RF and amplification technologies in enhancing public communication, particularly in schools, religious gatherings, emergency response, and outdoor events.