I picked up a Red Box today while L&M has them on sale. I wanted a DI and a cab simulator. Once I got home and started messing with it, I discovered that: 1) it needs an line or speaker input. It doesn't like the output from a pedal. 2) there's a few ways to use this box guitar>pedal>AmPlug>Red Box>mixer guitar>pedal>AmPlug>mixer/L>line out>Red Box>mixer/R guitar>pedal>mixer>line out L to AmPlug>Red Box>mixer line in R guitar>pedal>mixer>line out L>Red Box>AmPlug>pedal>mixer line in R If I use the line out to line in I can only monitor via headphones in stereo and record to the PC in mono, OR I can use the headphone out on the mixer to the line in on the PC to record in stereo, then monitor through the PC. Here's a photo of my "studio"