Radial ProRMP Passive Reamp Box with Custom Transformer

Professional recording engineers have long relied on reamping as their go-to technique for achieving exceptional tones across guitars, bass, keyboards, drums and vocals. This process allows musicians to focus entirely on capturing the perfect performance with a clean recording, then later send that signal back through amplifiers and effects to craft the ideal sound. The beauty of reamping lies in its flexibility — no more endless takes for guitarists, no rushed sessions due to tight schedules, and crucially, no need to commit to a particular tone during the initial recording phase.

The Radial ProRMP stands out as a completely passive reamping solution that requires no external power source. At its heart sits a custom-wound transformer that simultaneously converts balanced line-level signals to high-impedance output suitable for amplifiers while providing electrical isolation to eliminate ground loops and associated noise issues. This plug-and-play device handles all impedance matching automatically, connecting seamlessly between your recorder and amplifier setup with simple level adjustment.

Built to withstand the rigours of professional use, the ProRMP features robust 14-gauge steel construction with Radial’s distinctive book-end™ design and reinforced I-beam frame. This engineering approach protects the internal components and prevents stress on the PC board and solder joints. The full-bottom non-slip pad serves dual purposes — keeping the unit securely positioned while preventing electrical contact with amplifier chassis bolts that could introduce unwanted ground loops.