The Shure MX400DP is a professional desktop base and preamplifier unit designed for use with select Shure Micro-Flex boundary microphones. Its primary function is to provide a stable, low-profile platform for the boundary microphone capsule while also housing an internal, high-quality preamplifier. This combination elevates the microphone's signal to line level, allowing it to be connected directly to a mixing console, recording interface, or other professional audio system without requiring an external phantom-powered mic preamp. The unit is engineered for clarity and convenience in fixed installation applications such as conference rooms, boardrooms, courtrooms, and houses of worship, where discreet, reliable tabletop audio capture is essential.

The design of the MX400DP emphasizes both functionality and aesthetics. Its weighted, non-slip base ensures the microphone remains securely in place and minimizes transmission of surface vibrations. The internal preamplifier is powered by +48V phantom power supplied from the connected mixer via the attached microphone cable, simplifying setup by eliminating the need for a separate power supply. The unit features a low-cut filter switch to reduce low-frequency rumble and handling noise, and an output level attenuator (-15 dB pad) to prevent clipping from loud sources or close-mic'd speech. A front-panel LED indicator provides a clear visual confirmation of power and signal status.

As part of the Micro-Flex ecosystem, the MX400DP transforms a boundary microphone into a complete, self-contained pickup system ideal for capturing clear, natural audio from meetings, lectures, and discussions. By integrating the preamplifier directly into the base, Shure provides a clean, all-in-one solution that reduces cable clutter and setup complexity on conference tables. It delivers the consistent, high-quality audio reproduction that Shure is known for, making it a reliable and professional choice for any environment where intelligible audio reinforcement or recording from a table surface is required.