The Radial ProRMP passive reamping box allows you to take a previously recorded track right off your recorder or mixer and 're-amplify' it through a guitar amp or effects chain to create new and exciting tones. The ProRMP sounds natural and great. The magic behind it's superior tone is a specially designed custom wound transformer that at once converts the balanced low impedance source to a high-Z signal for your amp while electricaly isolating the amp thus eliminating troublesome ground loops t