Radial R800 2025 HDI Active Studio Instrument Preamp

The Radial HDI is built for recording engineers and touring professionals who demand sonic flexibility without complexity. Whether tracking guitars, keyboards, or bass in the studio or running live sound on the road, the HDI combines active signal conditioning with premium Jensen transformers to deliver clean, articulate tone or warm, saturated character—all from a single compact unit.

The Color control circuit is the heart of the HDI: slide between ultra-clean impedance matching and transformer-driven harmonic saturation, giving you infinite tonal possibilities. Pair this with Level and Presence controls, an optional opto compressor for transparent peak control, and a high-pass filter to manage low-end buildup, and you have a complete tone-shaping solution that integrates seamlessly into any mixing workflow.

Dual balanced outputs—mic and line level—eliminate the need for additional gain staging or external preamps. A responsive output meter provides instant visual feedback, while external powering via included supply or 48V phantom power ensures reliability in any environment.