The PM4100 is a multi-functional stereo preamplifier controlled via the network or RS-232 connection. The PM4100 is equipped with four stereo inputs, 4 GPIO, and one stereo output. It integrates easily with a variety of control systems and the USB input enables direct audio connection and volume control from a computer. The PM4100 can be powered by either PoE or 12V DC. It’s audio performance, ease-of-use, and versatile feature set makes the PM4100 ideal for a variety of professional audio applications.