Linear Tube Audio

Linear Tube Audio is an American hi-fi brand founded in 2015 by Mark Schneider, with roots in the long-running engineering work of David Berning and the ZOTL tube-amplifier technology the company builds around. It is based in Maryland and presents itself as a hand-built U.S. manufacturer focused on specialist two-channel audio rather than mass-market consumer electronics.

Its core product line centers on vacuum-tube amplifiers, especially integrated amps, headphone amps, and preamps; the brand is also associated with its ZOTL-based designs, which are a signature part of its identity. Linear Tube Audio is not known as a maker of speakers, turntables, DACs, or cables, and its catalog remains relatively focused compared with broader hi-fi brands.

In the market, Linear Tube Audio sits in the high-end boutique segment. It is best regarded as a niche enthusiast brand for buyers who value tube amplification, careful hand assembly, and technically distinctive design over mainstream scale or broad product breadth.