The best tech products announced this week include Bang & Olufsen's portable speaker and Leica's special-edition camera.

Like Folkvangr, the Schiit Valhalla 3 operates as a OTL/OCL design—no output transformers, no capacitors in the signal path.

This process simulates nearly every tube, preamp, and transformer, creating a fully digital “twin” made up of ones and zeros. In both cases, the goal is to take an instrument’s signal ...

So often when we read of a modification on a classic piece of tube electronics we prepare ... to allow its use as a stand-alone microphone preamplifier he also performs an extremely sympathetic ...