Almost 20 years after the release of the mythical preamplifier Nagra PL-P in 1998, Nagra releases one of the most ambitious projects in its history, the HD PREAMP. A perfect companion to the HD AMP, the HD PREAMP features a unique patented technology for volume control based on high-quality in-house made transformers. Powered by an external bank of super-caps, dual-mono, tube signal-path without feedback. The Nagra R&D Department, served by ten skilled and specialized audio engineers, worked on this project for three years with the goal of creating the most revealing and engaging preamplifier in the world.The Nagra R&D Department, served by ten skilled and specialized audio engineers, worked on this project for three years with the goal of creating the most revealing and engaging preamplifier in the world.