Great for Slaving Guitar Amps with your digital rig.
Before I had this box, I was having a hard time getting the tone I made in the studio (all software based amp sims etc.). I tried to go out of my interface into my amp and I kept getting a loud noise and it was very annoying. Later realized I wasn't doing this correctly, I had to change impedances and I needed a DI going in and a ReAmp box going out. ProRMP was a great inexpensive way to get my studio tone live. Not only does it do it's job, but it does it LOUD. I run this guy into my Effects Loop Return to slave the power amp on my 2x12 combo and it sounds MIGHTY. Best investment ever, hands down.