Sure, the heaters glow as bright as light bulbs, but that’s all part of the charm. Speaking of charm, we just love the amp these tubes went into. Built in 1920s breadboard-style, the features ...

If you were building a tube amplifier in the early 1990s, you were a significant outlier. The warm glow of a tube amplifier lends credibility to an audiophile set-up. Hannes Grobe / CC BY-SA 4.0 ...

and its glowing orange tubes can be seen tucked back within the chassis. But the flagship feature the brand has become known for (that McIntosh fans may find familiar) is the amplifiers glowing ...

two selectable amps: solid state or tube. The latter of which is the more interesting. That’s right, the Nunchaku houses a pair of Raytheon JAN6418 tubes — which you see glowing through its ...