The BOSE's POWERMATCH PM4500 programmable professional power amplifier delivers concert-quality sound with a high level of scalability and configurability. Network configuration, control, and monitoring are all possible with Ethernet-equipped models, and an expansion slot accepts input from optional digital audio accessory cards. PowerMatch amplifiers combine a variety of Bose technologies to provide an unrivalled mix of performance, efficiency, and ease of installation—all in a dependable, unique design.