Prima Donnas: 2x56 Here

These tubes are notoriously "microphonic." If you tap the chassis of the amplifier—or even walk too heavily across a hardwood floor—you might hear a "ping" through your speakers.

Owning a piece of gear like this isn't "set it and forget it." To keep your Prima Donnas singing: Prima Donnas: 2x56

Much like a difficult opera singer, the 56 tube requires a perfect environment to perform. But when the bias is right and the shielding is perfect, the vocal reproduction is unparalleled. The Technical Specs These tubes are notoriously "microphonic

There is a specific golden-age warmth that makes digital recordings sound more "human" and analog. Maintenance and Care The Technical Specs There is a specific golden-age

In audiophile circles, this specific 2x56 setup (meaning two Type 56 tubes acting as the heart of the preamp or driver stage) is called a Prima Donna for three reasons:

The most coveted versions are "mesh plate" tubes, where the internal structure is a fine wire grid rather than a solid piece of metal. This is widely believed to provide a more detailed, airy soundstage. Why "Prima Donna"?

Use tube dampers or high-mass isolation platforms to combat microphonics.