The MX56c, an upgrade to the Rolls MX56s, features four inputs including a mono 1/4" line input, a stereo 1/8" (3.5mm) line input, a balanced XLR microphone input with jumperable phantom power, and a stereo RCA line input. A variety of outputs have also been included on the MX56c. In addition to rear panel stereo RCA outputs, the MX56c offers a front panel stereo 1/8" (3.5mm) headphone/earphone output, and a 1/4" Tip-Ring-Sleeve balanced mic out. A power switch is located on the front panel, and the unit operates on a 9V alkaline battery or the included Rolls PS27 12VDC adapter.

This unit is ideal for the audio/video application where a microphone needs to be mixed with a stereo source such as a CD/MP3/DVD player, or wireless microphone to a video camera or sound system for presentations.