Direct Boxes (DI’s) with Stereo to Mono Summing


In my article, The Stereo to Mono Summing Cable that No One Makes, I described how to build (or buy) a cable that will take a stereo unbalanced signal and sum it to mono for connection to a PA system (mixer, power amp, etc.). You can connect the output end of such a mono-summing cable directly to a regular line 1/4″ line input. If, however, you need a balanced signal for connection to an XLR mic input on a mixer, you’ll need to use a mono-summing cable in conjunction with a DI box. Since writing that article, there have been several DI boxes that have hit the market that do something similar to what the mono-summing-cable-plus-DI-box combo do, so I thought it might be good to provide a quick overview of some of them. I’ve decided to list these in the order of the selling price from least to greatest. (more…)