I didn't know I needed this until I bought it. Now I'm runnign through it on almost all my tracks. Radial is a solid company from Canada making some of the most useful gear out there. This JDI is a classic. It's passive, so no power needed, it's built to last years, the sound it produces is warm and smooth, and the features on it are super useful. I just ran it from the output of my pedal board to the guitar amp and it sounds better with it in the chain then without. Also great for recording. Just tried a drum machine through it directly into DAW. Sounds great. I like this DI.