The Rolls MB15 ProMatch is an inexpensive line level audio device that converts consumer level stereo RCA signals to balanced XLR professional line level, and vice versa. The unit is useful for video duplication and audio recording studio applications; for example, connecting a consumer VCR to a professional video deck, or an off-the-shelf CD player to a professional mixing console or recorder.
The MB15 ProMatch has two XLR inputs and stereo RCA outputs on one side, labeled 1, and stereo RCA inputs and two XLR outputs on the other side, labeled 2. Each side has stereo level controls, and an LED indicates that power is applied to the unit.
Additionally, the MB15 ProMatch functions as a balanced XLR line level control. By adding a stereo pair of jumper cables between the four RCA jacks (connecting ins to outs), the two Level controls may be inserted into any balanced XLR line.