The HMB115 converts consumer level stereo RCA signals to balanced XLR professional line level, and back. One side of the unit, labeled 1, has two XLR inputs and stereo RCA outputs.
The other side labeled 2, has stereo RCA inputs and two XLR outputs. Each side has stereo level controls. An additional benefit of the MHMB115 is that it will act as a balanced XLR line level control.
The HMB115 was also designed to mount into a Rolls RMS270 rack tray, as shown below --RMS270 Compatibility Image--. This is a professional option for mounting two HMB115’s into a single space rack.