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Black flat boundary microphone with three capsules and USB cable, low-profile metal body sits on table

MXL MXLAC404 USB Boundary Condenser Conferencing Microphone - Black

SKU CH-SMB9-V0Q0T MPN MXLAC404

USB boundary condenser microphone with three capsules, 180-degree pickup, 25-foot range and built-in monitoring jack for clear conferencing audio

  • Additional FeaturesStand
  • PowerUSB
  • ConnectionsUSB
  • Weight0.2 kilograms
  • Outstanding sound quality in noisy environments from three boundary capsules
  • 180-degree pickup with 25-foot range covers the whole room
  • Plug-and-play USB connection works instantly on any computer
  • Built-in headphone jack enables real-time monitoring while recording
  • Durable all-metal construction stands up to daily use

Boundary USB Microphone

The MXL AC-404 is a USB boundary condenser microphone built for conferencing, court reporting and houses of worship. Three capsules in a surface-mount design give a 180 degree pickup pattern with a 25 foot range. It draws power and carries audio over a single USB connection and includes a built-in headphone or speaker monitoring jack. The all-metal body weighs .2 kilograms and rests discreetly on any flat surface.

Upgrade from built-in audio

Laptop microphones and basic headsets often pick up room noise and lack reach across a table. This boundary design captures speech clearly from a distance of 25 feet while rejecting off-axis sound. The jump is worth it when meetings involve multiple participants around a single device or when recording in reverberant spaces such as courtrooms and classrooms. Plug-and-play USB removes driver hassles on Windows and macOS.

Capacity and headroom

The 180 degree pattern comfortably handles a full conference table or podium without repositioning. At 25 feet the signal remains intelligible for web conferencing platforms such as Zoom. In very large halls or highly noisy environments the fixed gain and single USB bus power may limit headroom, so users needing wider coverage or independent gain control should consider a multi-microphone system.

Highlights

  • Outstanding sound quality in noisy environments from three boundary capsules
  • 180-degree pickup with 25-foot range covers the whole room
  • Plug-and-play USB connection works instantly on any computer
  • Built-in headphone jack enables real-time monitoring while recording
  • Durable all-metal construction stands up to daily use

Specifications

BrandMXL
ModelMXLAC404
Part NumberMXLAC404
Additional FeaturesStand
PowerUSB
ConnectionsUSB
Weight0.2 kilograms

Questions about this item

Does the MXLAC404 need any brackets or stands to sit on a conference table?

It is a boundary microphone designed to rest directly on any flat surface, and the supplied stand is the only mounting hardware required.

What is the correct way to connect the MXLAC404 and the monitoring headphones so audio routes properly?

Plug the USB cable into the host computer first, then connect headphones or speakers to the built-in monitoring jack; the operating system will then recognise both input and output paths.

Which parts of the MXLAC404 are most likely to need replacement after heavy daily use?

The USB cable and the monitoring jack are the only user-accessible connections that can wear with repeated plugging and unplugging.

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