The Midas DL155-UL is a versatile digital stage box designed to serve as a remote I/O extension for compatible Midas digital mixing consoles, such as those in the M32 and DL Series. It functions by converting analog audio signals to digital and vice versa, facilitating the transmission of high-channel-count audio between the stage and the mixing position over a single Cat-5e/Cat-6 cable using the proprietary Midas DL protocol (based on AES50). This setup drastically reduces the need for long analog multicores, minimizing noise, simplifying cabling, and accelerating setup times. The unit is equipped with 8 of Midas's highly regarded microphone preamplifiers for critical source capture, alongside an additional 8 line-level analog inputs and a total of 16 analog outputs, providing a balanced and flexible I/O complement for small to medium-sized live sound applications.

A distinctive feature of the DL155 is its integrated AES3 digital audio interface. This provides two channels of bi-directional digital I/O (typically on XLR connectors), allowing the stage box to connect directly to other digital equipment such as recording interfaces, digital snakes, or processors without requiring an additional analog-to-digital conversion stage. This preserves digital audio integrity and expands system integration options. The stage box is built for the rigors of touring and installation, housed in a robust 2U metal rack chassis with durable Neutrik connectors. Its UL certification denotes compliance with specific safety standards, which is often necessary for professional use in various venues and for certain installation permits.

Operation is fully integrated with the connected console; parameters for the remote preamps—including gain, phantom power, and phase—are controlled directly from the mixer's surface. The DL155 can be used as a standalone stage box or daisy-chained with other DL Series units to expand the system's total input and output capacity. By combining quality Midas preamps, flexible analog I/O, a useful AES3 digital interface, and the efficiency of a digital snake system, the DL155-UL provides live sound engineers and system integrators with a reliable and professional-grade solution for building clean, scalable, and high-performance audio systems.