If you’ve ever worked with vacuum tubes, you’ll probably have ... as [Albert van Dalen] demonstrates with his tube preamplifier running from only 3.3 V. If your first thought is that he ...

The C2800 Vacuum Tube Preamplifier features methodically designed ... including turntables via adjustable phono inputs. The amps also include premium-grade DAC technology for digital audio conversion.

At only $64.99 each, the Apos Ray 6SN7 Select vacuum tubes may deliver the dynamics and authentic sound you’ve been seeking. Few tubes have as storied a history as the 6SN7GT originally announced in ...

We more often see these amps using the cheaper integrated triode-pentode tubes which makes them especially easy to build, so the separate preamp is a little different. We’re not sure we’d have ...