When most people think of tube circuits, the first thing that comes to mind is often the use of high-voltage power supplies. It wasn’t a given for tube circuits, though, as a range of low-voltage ...

Nagra’s $24,500 PREAMP II-S is considered one of the company’s more affordable preamps. That alone tells you exactly who this is for—and who it isn’t. That it also likely sounds superb is almost ...