Make the everyday extraordinary.

ZOTL10 designed by David Berning.


A new amp by David Berning, ZOTL inventor, the ZOTL10 is one of his finest works yet.  Showcasing a designer at his best, the ZOTL10 Power Amplifier provides two 10W outputs with accurate, uncolored sound with automatically protected circuitry.  Rapid response, detailed sound, and an absence of the tube bloom typical of other amplifiers, the ZOTL10 Power Amplifier delivers experience defining realism.

ZOTL10 Power Amplifier

Hand-built in Washington, DC, with premium components, the ZOTL10 is available through Urban Hifi as part of their carefully curated collection of premium products.  

Performing at the theoretically correct turns ratio, a previously unheard of achievement, Linear Tube Audio’s ZOTL10 delivers an unparalleled, enlightening and stunningly realistic experience wherever it's plugged in.  Considered the only significant advance in tube circuitry since the 1960’s, ZOTL technology delivers an unforgettably palpable and memorably poignant listening experience by eliminating the output transformer in order to remove the inherent distortion found in transformer-type amplifiers.  Urban HiFi is proud to spotlight the level of attention to detail and expertise Linear Tube Audio has leveraged in their pursuit of affordable, high-end audio experience by offering the ZOTL10 and ZOTL40 for purchase in our online collection.

Perfect for high efficiency speakers, the ZOTL10 produces a much lower hum than most tube amplifiers and requires no adjustments since tubes are auto-biased.  The ZOTL10 uses EL-84, 12AT7, 12AU7 Russian Tung-Sol tubes and has a universal autosensing 100-240VAC 50/60Hz power supply. With push-pull Class AB output stage, a second set of inputs and a power amp input via the Alps volume control for direct connection to high output sources, the ZOTL10 Power Amplifier delivers experience defining realism.


  • Designed by David Berning - one of the world’s premier amplifier designers
  • Hand-wound coils & impedance converters
  • 10 watts per channel with little or no hum
  • Transformer-less design eliminates intermodulation distortion inherent in all transformer designs
  • Impedance converters simulate correct theoretical output transformer turns ratio
  • Low impedance output easily matches a wide range of speakers and cannot be damaged with no load
  • No adjustments – tubes are auto-biased
  • Automatic protection circuitry
  • High voltage turn on delay to maximize tube life
  • 10 - 20 years tube life depending on use
  • Push-pull, Class AB output stage
  • No heavy power or audio transformers
  • Universal voltage power supply (autosensing 100-240VAC 50/60Hz)
  • Has one input through Alps volume control for direct connection to high output sources
  • Second set of inputs bypass volume control for direct input

Premium Components

  • TUNG-SOL Russian vacuum tubes
  • Silver-coated Teflon copper insulated wiring
  • Alps volume control
  • Hand-wound coils & impedance converters
  • Gold connectors throughout signal path
  • 5-way gold binding posts  
  • High quality metal film resistors  


Architecture by Lucegroup