The Radial proRMP passive dreaming 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 prompt sounds natural and great. The magic behind its 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 electrically isolating the amp thus eliminating troublesome ground loops that can often cause buzz or hum. A level control allows you to easily adjust the source level to match the guitar level that the amp would normally see resulting in a natural sound as if you were playing the guitar into the amp. Like all Radial products the pro RMP is built tough with a 14 gauge steel housing and a unique book-end design that protects connectors and switches from damage. A welded i-beam frame prevents PC board stress while a full-bottom rubber pad prevents slipping around and offers electrical isolation from amp chassis bolts etc.