Electro-Voice MA-50 is a power amplifier designed for professional audio applications. The MA-50 is a versatile amplifier that can be used in a variety of applications, including live sound reinforcement, recording, and broadcast. The amplifier features a high-pass filter to protect driver loudspeakers from excessive low-frequency power demands, and a two-section high-pass filter to protect driver loudspeakers from excessive low-frequency power demands. The MA-50 also has a balanced XLR input and an unbalanced RCA input, making it compatible with a wide range of audio sources.