The Behringer Multicom Pro-XL MDX4600 is a versatile 4-channel rack mount compressor/limiter/gate unit designed for audio applications. With a frequency range of 20-20k Hz, this analogue unit offers compression and limiting capabilities in a quad channel setup. It features various input/output ports including TRS 1/4 and XLR, allowing for flexible connectivity options. The compact design, with a rack unit height of 1U, makes it easy to install in a studio setup. Perfect for professional audio production, the Behringer MDX4600 offers reliable and effective compression and limiting effects.