Check the listing for details. Radial Engineering ProRMP 1-channel Passive Re-Amping Device. Condition: New. Listed at 129.99 USD. The Radial ProRMP is a passive box that allows for re-amping of the signal. Re-amping has been the 'secret weapon' for countless recordings by the biggest names in the business and the process is often used on guitars, bass, keyboards, percussion and even voice to create new textures! The ProRMP is a 100% passive re-amplifier that lets you to take a pre-recorded track and re-amplify it through a guitar amp or effects pedals to create new and exciting tones. Dive into the creative possibilities of re-amping with the ProRMP. Reamping for every studio The Radial ProRMP is a 100% passive Reamper. This means it does not require any external powering. The magic behind the ProRMP's great tone is a custom wound transformer that at once converts the balanced line level source to a hi-z output for your amp while also acting as an electrical isolator to eliminate troublesome ground loops that can often cause buzz and hum in the sound. Plug and play easy to use, the ProRMP connects from the recorder to your amp and effects units and does all the impedance matching for you. Just adjust the level to suit!